TDK Network Card iQM Series User Manual

TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Supereta™ iQM Series DC/DC Power Modules  
48V Input, 1.5V / 70A Output  
Quarter Brick  
The Supereta™ Series offers an industry  
standard quarter brick high current power  
module with true useable output power. Its  
82% full load efficiency (85% at 75% of full  
load) and superior thermal performance  
make the Supereta™ Series of power  
modules ideally suited for tight space and  
power-hungry applications in demanding  
thermal environments. This rugged building  
block is designed to serve as the core of  
your high reliability system. A wide output  
voltage trim range, -20 to +10%, and remote  
sensing are standard features enhancing  
versatility.  
Standard Features:  
Standard Quarter Brick Pinout  
Size: 2.28” × 1.45” × 0.5”  
(57.9mm × 36.8mm × 12.7mm)  
Up to 70A of output current  
Power density – 63.5W / in3  
Efficiency – up to 88%  
Full load typical efficiency – 82%  
Output power – up to 105W  
Metal board design with high usable power  
46A at 65°C and 200LFM (1m/s)  
44A at 70°C and 200LFM (1m/s)  
Wide output voltage trim range  
Basic insulation – 1500Vdc  
Positive remote on/off logic  
Industry standard output voltage trim  
Remote sense  
Latched output over-voltage protection  
Auto-recovery full protections:  
o Input under and over voltage  
o Output over-current  
o Output short circuit  
o Thermal limit  
EMI: CISPR 22 A or B with external filter  
Multiple patents pending  
ISO Certified manufacturing facilities  
Optional Features:  
Negative remote on/off logic  
Short Thru-hole pins 2.79 mm (0.110”)  
Long Thru-hole pins 5.08 mm (0.200”)  
Non-latching output over-voltage  
protection  
Constant switching frequency  
UL 60950 (US and Canada), VDE 0805,  
CB scheme (IEC950)  
CE Mark (EN60950)  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
1/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Mechanical Specification:  
Dimensions are in mm [in]. Unless otherwise specified tolerances are: x.x 0.5 [0.02], x.xx and x.xxx 0.25 [0.010].  
1.02 [.040] DIA  
6 pins  
1.52 [.060] DIA  
2 pins  
M3 X .5 threaded  
inserts, 2 places  
8
7
6
5
4
1
2
3
3.40 [0.134] max Dia  
2 places  
Recommended hole pattern (top view)  
Pin Assignment:  
PIN  
FUNCTION  
PIN  
FUNCTION  
Vo(-)  
1
2
3
Vin(+)  
On/Off  
Vin(-)  
4
5
6
7
8
Sense(-)  
Trim  
Sense(+)  
Vo(+)  
Pin base material is copper or brass with matte tin or tin/lead plating; the maximum module weight is 60g (2.1 oz).  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
3/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Absolute Maximum Ratings:  
Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device.  
Characteristic  
Min  
-0.5  
---  
Max  
80  
Unit  
Vdc  
Notes & Conditions  
Continuous Input Voltage  
Transient Input Voltage  
100  
Vdc  
100mS max.  
Isolation Voltage  
Input to Output  
---  
---  
---  
1500  
1500  
500  
Vdc  
Vdc  
Vdc  
Basic Insulation  
Basic Insulation  
Operational Insulation  
Input to Base-plate  
Output to Base-plate  
Storage Temperature  
-55  
125  
˚C  
Measured at the location specified in the thermal  
measurement figure. Maximum temperature varies  
with model number, output current, and module  
orientation – see curve in thermal performance  
section of the data sheet.  
Operating Temperature Range (Tc)  
-40  
120  
˚C  
Input Characteristics:  
Unless otherwise specified, specifications apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.  
Characteristic  
Min  
36  
Typ  
48  
Max  
75  
Unit  
Vdc  
A
Notes & Conditions  
Operating Input Voltage  
Maximum Input Current  
60A output  
70A output  
---  
---  
3.4  
4.2  
---  
Vin = 0 to Vin,max  
Vin = 0 to Vin,max  
---  
---  
Turn-on Voltage  
Turn-off Voltage  
Hysteresis  
---  
34.7  
32.3  
2.4  
12  
Vdc  
Vdc  
Vdc  
mS  
31*  
1.5  
---  
---  
---  
Startup Delay Time from application of input  
voltage  
---  
Vo = 0 to 0.1*Vo,nom; on/off =on,  
Io=Io,max, Tc=25˚C  
Startup Delay Time from on/off  
---  
10  
---  
mS  
Vo = 0 to 0.1*Vo,nom; Vin = Vi,nom,  
Io=Io,max,Tc=25˚C  
Output Voltage Rise Time  
Inrush Transient  
---  
---  
---  
15  
---  
12  
---  
0.1  
---  
mS  
A2s  
Io=Io,max,Tc=25˚C, Vo=0.1 to 0.9*Vo,nom  
Exclude external input capacitors  
Input Reflected Ripple  
mApp  
See input/output ripple and noise  
measurements figure; BW = 20 MHz  
Input Ripple Rejection  
* Engineering Estimate  
---  
57  
---  
dB  
@120Hz  
Caution: The power modules are not internally fused. An external input line normal blow fuse with a maximum value of 10A is required; see the  
Safety Considerations section of the data sheet.  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
4/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Electrical Data:  
iQM48070A015V-000 through -009: 1.5V, 70A Output  
Characteristic  
Min  
Typ  
Max  
Unit  
Notes & Conditions  
Output Voltage Initial Setpoint  
1.47  
1.5  
1.53  
Vdc  
Vin=Vin,nom; Io=Io,max; Tc = 25˚C  
Over all rated input voltage, load, and  
temperature conditions to end of life  
Output Voltage Tolerance  
1.45  
1.5  
1.55  
Vdc  
Efficiency  
---  
---  
---  
---  
82  
1
---  
%
Vin=Vin,nom; Io=Io,max; Tc = 25˚C  
Vin=Vin,min to Vin,max, Io and Tc fixed  
Io=Io,min to Io,max, Vin and Tc fixed  
Tc=Tc,min to Tc,max, Vin and Io fixed  
Line Regulation  
Load Regulation  
Temperature Regulation  
5.0*  
7.0*  
50*  
mV  
mV  
mV  
1
10  
At loads less than Io,min the module will  
continue to regulate the output voltage, but  
the output ripple may increase  
Output Current  
7
---  
70  
A
Output Current Limiting Threshold  
Short Circuit Current  
---  
---  
75  
2
---  
---  
A
A
Vo = 0.9*Vo,nom, Tc<Tc,max  
Vo = 0.25V, Tc = 25  
mVpp  
Vin=48V, IoIo,min, Tc=25˚C. Measured  
across one 0.1uF, one 1.0 uF, and one  
47uF ceramic capacitors located 2 inches  
away – see input/output ripple  
---  
---  
60  
10  
100*  
---  
Output Ripple and Noise Voltage  
mVrms  
measurement figure; BW = 20MHz  
Output Voltage Adjustment Range  
Output Voltage Sense Range  
80  
---  
---  
---  
110  
10  
%Vo,nom  
%Vo,nom  
Dynamic Response:  
di/dt = 0.1A/uS, Vin=Vin,nom; load step  
from 50% to 75% of Io,max, Tc=25˚C with at  
least one 1.0 uF and one 47uF ceramic  
capacitors across the output terminals  
Recovery Time to 10% of Peak Deviation  
Transient Voltage  
---  
---  
250  
100  
---  
---  
µS  
mV  
Output Voltage Overshoot during startup  
Switching Frequency  
0
---  
0
---  
---  
mV  
kHz  
V
Vin=Vin,nom; Io=Io,max,Tc=25˚C  
140  
1.83  
---  
Fixed  
Output Over Voltage Protection  
External Load Capacitance  
1.80*  
48  
2.10*  
uF  
Minimum ESR > 2.5 mΩ  
50,000 †  
Isolation Capacitance  
Isolation Resistance  
Vref  
---  
1000  
---  
---  
---  
pF  
M  
V
10  
1.225  
Required for trim calculation  
* Engineering Estimate  
Contact TDK Innoveta for applications that require additional capacitance or very low ESR  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
5/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Electrical Characteristics:  
iQM48070A015V-000 through -009: 1.5V, 70A Output  
25  
20  
15  
10  
5
90  
88  
86  
84  
82  
80  
78  
0
10  
15  
20 25  
30  
35  
40 45  
50  
55  
60 65  
70  
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
60  
65  
70  
Output Current (A)  
Output Current (A)  
Vin = 36V  
Vin = 48V  
Vin = 75V  
Vin = 36V  
Vin = 48V  
Vin = 75V  
Efficiency vs. Input Voltage at Ta=25C, No Heat Sink  
Power Dissipation vs. Input Voltage at Ta=25C, No  
Heat Sink  
5
4
3
2
1
0
30  
35  
40  
45  
50  
55  
60  
65  
70  
75  
Input Voltage (V)  
Io_min = 7A  
Io_mid = 35A  
Io_max = 70.7A  
Series4  
Start-up from on/off Switch, 48Vin, Full Load, Cext,min.  
Ch. 1: Vo Ch. 2: ON/OFF Ch. 3: Vin Ch. 4: Io  
Typical Input Current vs. Input Voltage Characteristics  
Start-up from Nominal Vin, Full Load, and Cext, min.  
Load Transient Response. Load Step from 50% to 75%  
of Full Load with di/dt= 0.1A/uS. Ch. 1: Vo Ch. 4: Io  
Ch. 1: Vo  
Ch. 2: ON/OFF Ch. 3: Vin Ch. 4: Io  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
6/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Electrical Characteristics (continued): iQM48070A015V-000 through -009: 1.5V, 70A Output  
2
1.5  
1
0.5  
0
0
10  
20  
30  
40  
50  
60  
70  
80  
90  
Output Current (A)  
Vin = 36V  
Vin = 48V  
Vin = 75V  
Output Current Limit Characteristics vs. Input Voltage at  
Ta=25C.  
Typical Output Ripple at 48V Input and Full Load at  
Ta=25C  
Ch. 1: Vo  
1.505  
1.5045  
1.504  
1.506  
1.5055  
1.505  
1.5045  
1.504  
1.5035  
1.503  
1.5035  
1.503  
36  
5
10 15 20 25 30 35 40 45 50 55 60 65 70  
Output Current (A)  
41  
46  
51  
56  
61  
66  
71  
76  
Input Voltage (V)  
Vin = 36V  
Vin = 48V  
Vin = 75V  
Io_min = 7A  
Io_mid = 35A  
Io_max = 70.7A  
Typical Output Voltage vs. Load Current at Ta=25C.  
Typical Output Voltage vs. Input Voltage at Ta=25C.  
Trim  
Down  
Resistor  
(Ohm)  
%
Change  
of Vout  
%
Change  
of Vout  
Trim Up  
Resistor  
(Ohm)  
-10  
-20  
40.9K  
15.3K  
+5  
19.0K  
7.51K  
+10  
e.g. trim up 5%  
5.11x1.5(100 + 5) 511  
Rup = [  
10.22]K  
1.225x5  
5
Start-up with Back-biased Voltage (1.4V) and 3A Load.  
Ch. 1: Vo Ch. 4: Io  
Calculated Resistor Values for Output Voltage Adjustment  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
7/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Thermal Performance:  
iQM48070A015V-000 through -009: 1.5V, 70A Output  
65  
60  
55  
50  
45  
40  
35  
30  
25  
20  
15  
65  
60  
55  
50  
45  
40  
35  
30  
25  
20  
15  
40  
50  
60  
70  
80  
90  
100  
110  
120  
130  
40  
50  
60  
70  
80  
90  
100  
110  
120  
Ambient Temperature (C)  
Temperature (C)  
0.3m/s (60LFM)  
3.0m/s (600LFM)  
0.5m/s (100LFM)  
Max IMS < 1m/s  
1.0m/s (200LFM)  
Max IMS > 1m/s  
1.5m/s (300LFM)  
2.0m/s (400LFM)  
0.3m/s (60LFM)  
3.0m/s (600LFM)  
0.5m/s (100LFM)  
Max IMS < 1m/s  
1.0m/s (200LFM)  
Max IMS > 1m/s  
1.5m/s (300LFM)  
2.0m/s (400LFM)  
Maximum output current vs. ambient temperature at nominal  
input voltage for airflow rates natural convection (0.3m/s) to  
3.0m/s with airflow from pin 3 to pin 1 (best orientation).  
Maximum output current vs. ambient temperature at nominal  
input voltage for airflow rates natural convection (0.3m/s) to  
3.0m/s with airflow from pin 1 to pin 3.  
I
O
u
t
p
u
t
n
p
u
t
Thermal  
best  
measurement  
location  
orientation  
airflow  
Thermal measurement location – top view  
The thermal curves provided are based upon measurements made in TDK Innoveta’s experimental test setup that is  
described in the Thermal Management section. Due to the large number of variables in system design, TDK Innoveta  
recommends that the user verify the module’s thermal performance in the end application. The critical component should  
be thermo- coupled and monitored, and should not exceed the temperature limit specified in the derating curve above. It  
is critical that the thermocouple be mounted in a manner that gives direct thermal contact otherwise significant  
measurement errors may result.  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
8/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
The cross section of the airflow passage is  
Thermal Management:  
rectangular with the spacing between the  
top of the module and a parallel facing PCB  
kept at a constant (0.5 in). The power  
module’s orientation with respect to the  
airflow direction can have a significant  
impact on the unit’s thermal performance.  
An important part of the overall system  
design process is thermal management;  
thermal design must be considered at all  
levels to ensure good reliability and lifetime  
of the final system. Superior thermal design  
and the ability to operate in severe  
Thermal Derating: For proper application of  
the power module in a given thermal  
environment, output current derating curves  
are provided as a design guideline in the  
application environments are key elements  
of a robust, reliable power module.  
A finite amount of heat must be dissipated  
from the power module to the surrounding  
environment. This heat is transferred by the  
three modes of heat transfer: convection,  
conduction and radiation. While all three  
modes of heat transfer are present in every  
application, convection is the dominant  
mode of heat transfer in most applications.  
However, to ensure adequate cooling and  
proper operation, all three modes should be  
considered in a final system configuration.  
Adjacent PCB  
Module  
Centerline  
A
I
R
F
L
O
W
12.7  
(0.50)  
The open frame design of the power module  
provides an air path to individual  
components. This air path improves  
convection cooling to the surrounding  
environment, which reduces areas of heat  
concentration and resulting hot spots.  
76 (3.0)  
AIRFLOW  
Test Setup: The thermal performance data  
of the power module is based upon  
measurements obtained from a wind tunnel  
test with the setup shown in the wind tunnel  
figure. This thermal test setup replicates the  
typical thermal environments encountered in  
most modern electronic systems with  
Air Velocity and Ambient  
Temperature  
Measurement Location  
Air Passage  
Centerline  
distributed power architectures. The  
electronic equipment in networking, telecom,  
wireless, and advanced computer systems  
operates in similar environments and utilizes  
vertically mounted printed circuit boards  
(PCBs) or circuit cards in cabinet racks.  
Wind Tunnel Test Setup Figure  
Dimensions are in millimeters and (inches).  
Thermal Performance section for the power  
module of interest. The module temperature  
should be measured in the final system  
configuration to ensure proper thermal  
management of the power module. For  
thermal performance verification, the module  
temperature should be measured at the  
component indicated in the thermal  
The power module is mounted on a 0.062  
inch thick, 6 layer, 2oz/layer PCB and is  
vertically oriented within the wind tunnel.  
Power is routed on the internal layers of the  
PCB. The outer copper layers are thermally  
decoupled from the converter to better  
simulate the customer’s application. This  
also results in a more conservative derating.  
measurement location figure on the thermal  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
9/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
performance page for the power module of  
interest. In all conditions, the power module  
should be operated below the maximum  
operating temperature shown on  
the derating curve. For improved design  
margins and enhanced system reliability, the  
power module may be operated at  
(longitudinal – perpendicular to the direction  
of the pins and transverse – parallel to the  
direction of the pins). The heatsink kit  
contains four M3 x 0.5 steel mounting  
screws and a precut thermal interface pad  
for improved thermal resistance between the  
power module and the heatsink. The  
screws should be installed using a torque-  
limiting driver set between 0.35-0.55 Nm (3-  
5 in-lbs).  
temperatures below the maximum rated  
operating temperature.  
Heat transfer by convection can be  
The system designer must use an accurate  
estimate or actual measure of the internal  
airflow rate and temperature when doing the  
heatsink thermal analysis. For each  
application, a review of the heatsink fin  
orientation should be completed to verify  
proper fin alignment with airflow direction to  
maximize the heatsink effectiveness. For  
TDK Innoveta standard heatsinks, contact  
TDK Innoveta Inc. for latest performance  
data.  
enhanced by increasing the airflow rate that  
the power module experiences. The  
maximum output current of the power  
module is a function of ambient temperature  
(TAMB) and airflow rate as shown in the  
thermal performance figures on the thermal  
performance page for the power module of  
interest. The curves in the figures are  
shown for natural convection through 2 m/s  
(400 ft/min). The data for the natural  
convection condition has been collected at  
0.3 m/s (60 ft/min) of airflow, which is the  
typical airflow generated by other heat  
dissipating components in many of the  
systems that these types of modules are  
used in. In the final system configurations,  
the airflow rate for the natural convection  
condition can vary due to temperature  
gradients from other heat dissipating  
components.  
Heatsink Usage: For applications with  
demanding environmental requirements,  
such as higher ambient temperatures or  
higher power dissipation, the thermal  
performance of the power module can be  
improved by attaching a heatsink or cold  
plate. The iQM platform is designed with a  
base plate with two M3 X 0.5 through-  
threaded mounting fillings for attaching a  
Heatsink or cold plate. The addition of a  
heatsink can reduce the airflow requirement;  
ensure consistent operation and extended  
reliability of the system. With improved  
thermal performance, more power can be  
delivered at a given environmental condition.  
Standard heatsink kits are available from  
Innoveta Technologies for vertical module  
mounting in two different orientations  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
10/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Operating Information:  
Over-Current Protection: The power  
modules have current limit protection to  
protect the module during output overload  
and short circuit conditions. During overload  
conditions, the power modules may protect  
themselves by entering a hiccup current limit  
mode. The modules will operate normally  
once the output current returns to the  
specified operating range. There is a  
roughly 2ms delay from the time an overload  
condition appears at the module output until  
the hiccup mode will occur.  
the power module at the on/off terminal is  
15V. The maximum allowable leakage  
current of the switch is 50uA. The switch  
must be capable of maintaining a low signal  
Von/off < 1.2V while sinking 1mA.  
The standard on/off logic is positive logic.  
The power module will turn on if pin 2 is left  
open and will be off if pin 2 is connected to  
pin 3. If the positive logic circuit is not being  
used, terminal 2 should be left open.  
An optional negative logic is available. The  
module will turn on if pin 2 is connected to  
pin 3, and it will be off if pin 2 is left open. If  
the negative logic feature is not being used,  
pin 2 should be shorted to pin 3.  
Output Over-Voltage Protection: The  
power modules have a control circuit,  
independent of the main control loop, that  
reduces the risk of over voltage appearing at  
the output of the power module during a  
fault condition. If there is a fault in the main  
regulation loop, the over voltage protection  
circuitry will latch the power module off once  
it detects the output voltage condition as  
specified on the Electrical Data page. To  
remove the module from the latched  
condition, either cycle the input power or  
toggle the remote ON/OFF pin providing that  
over-voltage conditions have been removed.  
The reset time of the ON/OFF pin should be  
500ms or longer.  
The iQM Supereta family also offers an  
optional feature to allow non-latching 1-  
second hiccup mode over-voltage  
protection. Consult the TDK Innoveta  
technical support for details.  
Thermal Protection: When the power  
modules exceed the maximum operating  
temperature, the modules will turn-off to  
safeguard the units against thermal damage.  
The module will auto restart as the unit is  
cooled below the over temperature  
threshold.  
Remote On/Off: - The power modules have  
an internal remote on/off circuit. The user  
must supply an open-collector or compatible  
switch between the Vin(-) pin and the on/off  
pin. The maximum voltage generated by  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
11/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Vout(+)  
Vin (+)  
On/ Off  
Sense(+)  
Trim  
Rdown  
Sense(-)  
Vout(-)  
Vin(-)  
Circuit to decrease output voltage  
On/Off Circuit for positive or negative logic  
Output Voltage Adjustment: The output  
voltage of the module may be adjusted by  
using an external resistor connected  
between the trim pin 6 and either the Sense  
(+) or Sense (-) pin. If the voltage trim  
feature is not used, pin 6 should be left  
open. Care should be taken to avoid  
injecting noise into the module’s trim pin. A  
small 0.01uF capacitor between the power  
module’s trim pin and Sense (-) pin may  
help to avoid this.  
10000  
1000  
100  
With a resistor between the trim pin and  
Sense (-) pin, the output voltage is adjusted  
down. To adjust the output voltage down a  
percentage of Vout (%) from Vo,nom, the  
trim resistor should be chosen according to  
the following equation:  
10  
0
2
4
6
8
10 12 14 16 18 20  
% Decrease in Output Voltage, (%)  
With a resistor between the trim pin and  
sense (+) pin, the output voltage is adjusted  
up. To adjust the output voltage up a  
percentage of Vout (%) from Vo,nom the  
trim resistor (in k) should be chosen  
according to the following equation:  
100  
Rdown = 5.11× (  
2)  
(k)  
%  
Where  
%=100×(Vo,nom - Vdesired) / Vo_nom  
V0,nom × (100 + ∆%)  
100  
Rup = 5.11× (  
2)  
Vref × ∆%  
%  
The current limit set point does not increase  
as the module is trimmed down, so the  
available output power is reduced.  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
12/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Remote Sense: The power modules feature  
remote sense to compensate for the effect  
of output distribution drops. The output  
voltage sense range defines the maximum  
voltage allowed between the output power  
terminals and output sense terminals, and it  
is found on the electrical data page for the  
power module of interest. If the remote  
sense feature is not being used, the  
Vout(+)  
Sense(+)  
Rup  
Trim  
Sense(+) pin should be connected to the  
Vo(+) pin and the Sense (-) pin should be  
connected to the Vo(-) pin.  
Sense(-)  
Vout(-)  
The output voltage at the Vo(+) and Vo(-)  
terminals can be increased by either the  
remote sense or the output voltage  
Circuit to increase output voltage  
adjustment feature. The maximum voltage  
increase allowed is the larger of the remote  
sense range or the output voltage  
1000  
100  
10  
adjustment range; it is not the sum of both.  
As the output voltage increases due to the  
use of the remote sense, the maximum load  
current must be decreased for the module to  
remain below its maximum power rating.  
EMC Considerations: TDK Innoveta power  
modules are designed for use in a wide  
variety of systems and applications. With  
the help of external EMI filters and careful  
layout, it is possible to meet CISPR 22 class  
A or B requirement. For assistance with  
designing for EMC compliance, please  
contact TDK Innoveta technical support.  
1
0
2
4
6
8
10  
% Increase in Output Voltage, (%)  
Input Impedance: The source impedance  
of the power feeding the DC/DC converter  
module will interact with the DC/DC  
converter. To minimize the interaction, one  
or more 33-100uF/100V input electrolytic  
capacitors should be present if the source  
inductance is greater than 4uH.  
The value of Vref can be found in the  
Electrical Data section of this data sheet.  
The maximum power available from the  
power module is fixed. As the output  
voltage is trimmed up, the maximum output  
current must be decreased to maintain the  
maximum rated power of the module. It is  
also desirable to slightly increase the input  
voltage while trimming up the output with  
heavy load current.  
Reliability:  
The power modules are designed using TDK  
Innoveta’s stringent design guidelines for  
component derating, product qualification,  
and design reviews. Early failures are  
screened out by both burn-in and an  
As the output voltage is trimmed up, the  
output over-voltage protection set point is  
not adjusted. Trimming the output voltage  
too high may cause the output over voltage  
protection circuit to be triggered.  
automated final test. The MTBF is  
calculated to be greater than 2.64M hours at  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
13/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
nominal input, full load, and Ta = 40˚C using  
the Telcordia TR-332 issue 6 calculation  
method.  
Quality:  
TDK Innoveta’s product development  
process incorporates advanced quality  
planning tools such as FMEA and Cpk  
analysis to ensure designs are robust and  
reliable. All products are assembled at ISO  
certified assembly plants.  
Improper handling or cleaning processes  
can adversely affect the appearance,  
testability, and reliability of the power  
modules. Contact TDK Innoveta technical  
support for guidance regarding proper  
handling, cleaning, and soldering of TDK  
Innoveta’s power modules.  
Input/Output Ripple and Noise Measurements:  
Lin  
+
+
Vs  
C1  
Cext  
C0  
RLoad  
Vout  
-
Vin  
-
GroundPlane  
The input reflected ripple is measured with a current probe and oscilloscope. The ripple current is the current through a  
12µH differential mode inductor, Lin, with esr 10 m, feeding a capacitor, C1, esr 700 m@ 100kHz, across the  
module input voltage pins. The capacitor C1 across the input shall be at least 100µF/100V. A 220µF/100V capacitor is  
recommended. A 220µF/100V capacitor for C0 is also recommended.  
The output ripple measurement is made approximately 7 cm (2.75 in.) from the power module using an oscilloscope and  
BNC socket. The capacitor Cext is located about 5 cm (2 in.) from the power module; its value varies from code to code  
and is found on the electrical data page for the power module of interest under the ripple & noise voltage specification in  
the Notes & Conditions column.  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
14/15  
 
TM  
Data Sheet: Supereta iQM Series –Single Output Quarter Brick  
Safety Considerations:  
For safety agency approval of the system in  
which the DC-DC power module is installed,  
the power module must be installed in  
compliance with the creepage and clearance  
requirements of the safety agency. The  
isolation is basic insulation. For  
applications requiring basic insulation, care  
must be taken to maintain minimum  
creepage and clearance distances when  
routing traces near the power module.  
1) The input source is isolated from the  
ac mains by reinforced insulation.  
2) The input terminal pins are not  
accessible.  
3) One pole of the input and one pole of  
the output are grounded or both are  
kept floating.  
4) Single fault testing is performed on the  
end system to ensure that under a  
single fault, hazardous voltages do not  
appear at the module output.  
As part of the production process, the power  
modules are hi-pot tested from primary and  
secondary at a test voltage of 1500Vdc.  
Warranty:  
To preserve maximum flexibility, the power  
modules are not internally fused. An  
external input line normal blow fuse with a  
maximum value of 10A is required by safety  
agencies. A lower value fuse can be  
selected based upon the maximum dc input  
current and maximum inrush energy of the  
power module.  
TDK Innoveta’s comprehensive line of  
power solutions includes efficient, high-  
density DC-DC converters. TDK Innoveta  
offers a three-year limited warranty.  
Complete warranty information is listed on  
our web site or is available upon request  
from TDK Innoveta.  
When the supply to the DC-DC converter is  
less than 60Vdc, the power module meets  
all of the requirements for SELV. If the  
input voltage is a hazardous voltage that  
exceeds 60Vdc, the output can be  
considered SELV only if the following  
conditions are met:  
TDK Innoveta, Inc.  
3320 Matrix Drive, Suite 100  
Richardson, Texas 75082  
Phone (877) 498-0099 Toll Free  
(469) 916-4747  
Information furnished by TDK Innoveta is believed to be accurate and reliable. However, TDK Innoveta assumes no responsibility  
for its use, nor for any infringement of patents or other rights of third parties, which may result from its use. No license is granted  
by implication or otherwise under any patent or patent rights of TDK Innoveta. TDK Innoveta components are not designed to be  
used in applications, such as life support systems, wherein failure or malfunction could result in injury or death. All sales are  
subject to TDK Innoveta’s Terms and Conditions of Sale, which are available upon request. Specifications are subject to change  
Fax  
(877) 498-0143 Toll Free  
(214) 239-3101  
(877) 498-0099  
©2004-2006 TDK Innoveta Inc.  
iQM 1.5V/70A Datasheet 8/4/2006  
15/15  
 

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