SQE48T20120-PGAK [BEL]
DC-DC Regulated Power Supply Module, 1 Output, 240W, Hybrid, ONE-EIGHTH BRICK PACKAGE-5;
| 型号： | SQE48T20120-PGAK |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 240W, Hybrid, ONE-EIGHTH BRICK PACKAGE-5 |
| 文件： | 总13页 (文件大小：434K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Features
RoHS lead-free solder and lead-solder-exempted
products are available
Industry-standard quarter-brick pinout
Delivers 240W at 94.5% efficiency
Withstands 100V input transient for 100ms
Fixed-frequency operation
On-board input differential LC-filter
Start-up into pre-biased load
No minimum load required
Meets Basic Insulation requirements
Fully protected (OTP, OCP, OVP, UVLO)
Positive or negative logic ON/OFF option
Low height of 0.44” (11.18mm)
Weight: 33.3g
Applications
Intermediate Bus Architectures
Data communications/processing
LAN/WAN
High reliability: MTBF = 14.3 million hours,
calculated per Telcordia SR-332, Method I Case 1
Servers, Workstations
Approved to the following Safety Standards:
UL/CSA60950-1, EN60950-1, and IEC60950-1
(In process)
Benefits
High efficiency – no heat sink required 1
Designed to meet Class B conducted emissions per
FCC and EN55022 when used with external filter
Industry-standard 1/8th brick footprint: 0.896” x
2.30” (2.06 in2) - 38% smaller than conventional
quarter-bricks
All materials meet UL94, V-0 flammability rating
Description
The new high performance 20A SQE48T20120 DC-DC converter provides a high efficiency single output, in a 1/8th
brick package that is only 62% the size of the industry-standard quarter-brick. Specifically designed for operation
in systems that have limited airflow and increased ambient temperatures, the SQE48T20120 converter utilizes the
same pinout and Input/Output functionality of the industry-standard quarter-bricks. In addition, a heat spreader
feature is available (-xGxBx suffix) that provides an effective thermal interface for coldplate and heat sinking
options.
The SQE48T20120 converter thermal performance is accomplished through the use of patented/patent-pending
circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management,
and a low-body profile.
Low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling
for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced
electronic circuits and thermal design, results in a product with extremely high reliability.
Operating from a wide-range 36-75V input, the SQE48T20120 converter provides a fully regulated 12V output
voltage. Employing a standard power pinout, the SQE48T20120 converter is an ideal drop-in replacement for
existing high current quarter-brick designs. Inclusion of this converter in a new design can result in significant
board space and cost savings. The designer can expect reliability improvement over other available converters
because of the SQE48T20120’s optimized thermal efficiency.
1
Baseplate/heat spreader option (suffix ‘-xGxBx’) facilitates heatsink mounting to further enhance the unit’s thermal capability.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 1 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Electrical Specifications
Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=100 µF, unless otherwise specified.
Parameter
Notes
Min
Typ
Max Units
Absolute Maximum Ratings
Input Voltage
Continuous
Transient (100ms)
-0.3
80
100
85
VDC
VDC
°C
Operating Temperature
-40
-40
-40
-55
Ambient (TA)
(Note: 1) Component (TC)
Baseplate (TB)
125
105
°C
°C
(See Derating Curves)
Storage Temperature
125
°C
Isolation Characteristics
I/O Isolation
2,250
10
VDC
pF
w/o In/Out capacitor (suffix ‘-xDx0x’)
Isolation Capacitance
Isolation Resistance
200
MΩ
I/O Isolation
1,500
10
VDC
pF
with In/Out capacitor (suffix ‘-xDxKx’)
Isolation Capacitance
Isolation Resistance
1,200
1,500
MΩ
Input to Baseplate
Output to Baseplate
1,500
1,500
VDC
VDC
w/o In/Out capacitor (suffix ‘-xGxBx’)
Feature Characteristics
Switching Frequency
450
n/a
kHz
%
Output Voltage Trim Range 2
Remote Sense Compensation 2
Output Overvoltage Protection (Non-latching)
n/a
%
110
120
130
300
130
%
(Note: 1) Component (TC)
Over Temperature Shutdown
(Non-latching)
°C
ms
Auto-Restart Period
Applies to all protection features
Turn-On Time from Vin
Time from UVLO to Vo=90%VOUT(NOM)
Resistive load
Time from ON to Vo=90%VOUT(NOM)
Resistive load
Time from UVLO to Vo=90%VOUT(NOM)
Resistive load, CEXT=10,000µF load
Time from ON to Vo=90%VOUT(NOM)
10
10
12
12
ms
ms
ms
ms
Turn-On Time from ON/OFF Control
Turn-On Time from Vin
(w/ Co max.)
Turn-On Time from ON/OFF Control
(w/ Co max.) Resistive load, CEXT=10,000µF load
ON/OFF Control (Positive Logic)
Converter Off (logic low)
Converter On (logic high)
Converter Off (logic low)
Converter On (logic high)
-20
2.4
2.4
-20
0.8
20
VDC
VDC
VDC
VDC
ON/OFF Control (Negative Logic)
20
0.8
Additional Notes:
1
Reference Figure E for component (TC and TB) locations.
This functionality not provided, however the unit is fully regulated.
2
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 2 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Electrical Specifications (continued)
Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=100 µF, unless otherwise specified.
Parameter
Input Characteristics
Notes
Min
Typ
Max Units
Operating Input Voltage Range
Input Undervoltage Lockout
Turn-on Threshold
36
48
75
VDC
33
31
34.5
33
35.5
34.5
VDC
VDC
VDC
ADC
mA
Turn-off Threshold
Lockout Hysteresis Voltage
Maximum Input Current
Input Standby Current
1.0
2.0
Po = 240W @ 36VDC In
7.1
20
Vin = 48V, converter disabled
14
Input No Load Current (No load on the output)
Vin = 48V, converter enabled
100
250
mA
400
130
25
550 mAPK-PK
Input Reflected-Ripple Current, ic
250
50
mARMS
mAPK-PK
mARMS
dB
Vin = 48V, 25 MHz bandwidth,
Po=240W (Fig. 10)
Input Reflected-Ripple Current, iS
10
20
Input Voltage Ripple Rejection
120 Hz
45
Output Characteristics
Output Voltage Setpoint
Output Regulation
Over Line
11.76
11.64
12.00 12.24
VDC
VIN=48V, IOUT=0Amps, TA=25°C
±12
±6
±24
±12
mV
mV
IOUT=20Amps, TA=25°C
VIN=48V, , TA=25°C
Over Load
Output Voltage Range
Over line, load and temperature
12.36
VDC
50
25
100 mVPK-PK
I
OUT=20Amps,
Output Ripple and Noise – 25 MHz bandwidth
Admissible External Load Capacitance
CEXT =10 µF tantalum + 1 µF ceramic
50
VRMS
I
OUT=20Amps (resistive)
CEXT
ESR
0 1
1
10,000
µF
mOhm
Output Current Range
Current Limit Inception
RMS Short-Circuit Current
0
20
28
ADC
ADC
ARMS
Non-latching
20.5
25
10
Non-latching Short = 10 mΩ
12.5
Dynamic Response
Load Change 50%-75%-50% of IOUT Max
75
30
140
50
mV
µs
CEXT = 10µF tantalum + 1µF ceramic
(di/dt = 0.1 A/μs)
Settling Time to 1% of VOUT
Efficiency
%
%
@ 100% Load
94.5
95
48VIN, TA=25°C, 300LFM
@ 50% Load
Additional Notes:
1
See “Input Output Impedance”, Page 4.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 3 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Environment and Mechanical Specifications
Environmental
Operating Humidity
Storage Humidity
Mechanical
Weight
Non-condensing
Non-condensing
95
95
%
%
33.3
Vibration
GR-63-CORE, Sect. 5.4.2
Half Sinewave, 3-axis
1
g
g
Shocks
50
Reliability
Telcordia SR-332, Method I Case 1
50% electrical stress, 40°C components
MTBF
14.3
MHrs
EMI and Regulatory Compliance
Conducted Emissions
CISPR 22 B with external EMI filter network
Operations
Input and Output Impedance
These power converters have been designed to be
stable with no external capacitors when used in low
inductance input and output circuits.
However, in some applications, the inductance
associated with the distribution from the power
source to the input of the converter can affect the
stability of the converter. A 100 µF tantalum
capacitor with an ESR < 0.150 Ω across the input is
recommended to ensure stability of the converter
over all operating conditions.
Fig. A: Typ. Circuit configuration for ON/OFF function.
The positive logic version turns on when the ON/OFF
pin is at a logic high and turns off when at a logic
low. The converter is on when the ON/OFF pin is left
open. See the Electrical Specifications for logic
high/low definitions.
In many end applications, a high capacitance value
is applied to the converter’s output via distributed
decoupling capacitors. The power converter will
exhibit stable operation with external load
capacitance up to 10,000 µF.
The negative logic version turns on when the pin is
at a logic low and turns off when the pin is at a logic
high. The ON/OFF pin can be hard wired directly to
Vin(-) to enable automatic power up of the converter
without the need of an external control signal.
ON/OFF (Pin 2)
The ON/OFF pin is used to turn the power converter
on or off remotely via a system signal. There are two
remote control options available, positive and
negative logic, with both referenced to Vin(-). A
typical connection is shown in Figure A.
The ON/OFF pin is internally pulled up to 5V through
a resistor. A properly de-bounced mechanical switch,
open-collector transistor, or FET can be used to
drive the input of the ON/OFF pin. The device must
be capable of sinking up to 0.2 mA at a low level
voltage of 0.8 V. An external voltage source (±20 V
maximum) may be connected directly to the ON/OFF
input, in which case it must be capable of sourcing or
sinking up to 1 mA depending on the signal polarity.
See the Startup Information section for system timing
waveforms associated with use of the ON/OFF pin.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 4 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Safety Requirements
Protection Features
The
converters
are
safety
approved
to
Input Undervoltage Lockout (UVLO)
UL/CSA60950-1, EN60950-1, and IEC60950-1.
Basic Insulation is provided between input and
output.
Input undervoltage lockout is standard with this
converter. The converter will shut down when the
input voltage drops below a pre-determined voltage.
The converters have no internal fuse. If required, the
external fuse needs to be provided to protect the
converter from catastrophic failure. Refer to the
“Input Fuse Selection for DC/DC converters”
application note on www.power-one-com for proper
selection of the input fuse. Both input traces and the
chassis ground trace (if applicable) must be capable
of conducting a current of 1.5 times the value of the
fuse without opening. The fuse must not be placed
in the grounded input line.
The input voltage must be typically 35V for the
converter to turn on. Once the converter has been
turned on, it will shut off when the input voltage
drops typically below 33V. This feature is beneficial
in preventing deep discharging of batteries used in
telecom applications.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent or
short circuit conditions. Upon sensing an overcurrent
condition, the converter will shut down.
Abnormal and component failure tests were
conducted with the input protected by a 10A fuse. If
a fuse rated greater than 10A is used, additional
testing may be required. To protect a group of
converters with a single fuse, the rating can be
increased from the recommended value above.
Once this occurs, it will enter hiccup mode and
attempt to restart approximately every 300 ms with
an approximate duty cycle of 5%. The attempted
restart will continue indefinitely until the overload or
short circuit condition is removed.
Once the output current is brought back into its
specified range, the converter automatically exits the
hiccup mode and resumes normal operation
Electromagnetic Compatibility (EMC)
EMC requirements must be met at the end-product
system level, as no specific standards dedicated to
EMC characteristics of board mounted component
dc-dc converters exist. However, Power-One tests its
converters to several system level standards,
primary of which is the more stringent EN55022,
Output Overvoltage Protection (OVP)
The converter will shut down if the output voltage
across Vout(+) and Vout(-) exceeds the threshold of
the OVP circuitry. The OVP circuitry contains its own
reference, independent of the output voltage
regulation loop. Once the converter has shut down, it
will attempt to restart every 300 ms until the OVP
condition is removed.
Information
technology
equipment
-
Radio
disturbance characteristics - Limits and methods of
measurement.
An effective internal LC differential filter significantly
reduces input reflected ripple current, and improves
EMC.
Overtemperature Protection (OTP)
The converter will shut down under an
overtemperature condition to protect itself from
overheating caused by operation outside the thermal
derating curves, or operation in abnormal conditions
such as system fan failure. The converter will
automatically restart after it has cooled to a safe
operating temperature.
With the addition of a simple external filter, the
SQE48T20120 converter will pass the requirements
of Class B conducted emissions per EN55022 and
FCC requirements. Refer to Figures 14 – 15 for
typical performance with external filter.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 5 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Startup Information (using negative ON/OFF)
VIN
Scenario #1: Initial Startup From Bulk Supply
ON/OFF function enabled, converter started via application
of VIN. See Figure E.
ON/OFF
STATE
OFF
Time
t0
Comments
ON/OFF pin is ON; system front-end power is
toggled on, VIN to converter begins to rise.
VIN crosses undervoltage Lockout protection
circuit threshold; converter enabled.
Converter begins to respond to turn-on
command (converter turn-on delay).
t1
t2
t3
ON
VOUT
Converter VOUT reaches 100% of nominal value.
For this example, the total converter startup time (t3- t1) is
typically 12 ms.
t
t0
t1 t2
t3
Fig. B: Startup scenario #1.
Scenario #2: Initial Startup Using ON/OFF Pin
With VIN previously powered, converter started via
ON/OFF pin. See Figure F.
VIN
Time
t0
t1
Comments
VINPUT at nominal value.
Arbitrary time when ON/OFF pin is enabled
(converter enabled).
t2
t3
End of converter turn-on delay.
Converter VOUT reaches 100% of nominal value.
ON/OFF
STATE
OFF
For this example, the total converter startup time (t3- t1) is
typically 12 ms.
ON
VOUT
Scenario #3: Turn-off and Restart Using ON/OFF Pin
With VIN previously powered, converter is disabled and
then enabled via ON/OFF pin. See Figure G.
Time
t0
Comments
t
VIN and VOUT are at nominal values; ON/OFF pin
ON.
t0
t1 t2
t3
t1
ON/OFF pin arbitrarily disabled; converter
output falls to zero; turn-on inhibit delay period
(300 ms typical) is initiated, and ON/OFF pin
action is internally inhibited.
Fig. C: Startup scenario #2.
t2
ON/OFF pin is externally re-enabled.
If (t2- t1) ≤ 300 ms, external action of
ON/OFF pin is locked out by startup inhibit
timer.
If (t2- t1) > 300 ms, ON/OFF pin action is
internally enabled.
t3
Turn-on inhibit delay period ends. If ON/OFF pin
is ON, converter begins turn-on; if off, converter
awaits ON/OFF pin ON signal; see Figure F.
End of converter turn-on delay.
t4
t5
Converter VOUT reaches 100% of nominal value.
For the condition, (t2- t1) ≤ 300 ms, the total converter
startup time (t5- t1) is typically 312ms. For (t2- t1) > 300 ms,
startup will be typically 125ms after release of ON/OFF pin.
Fig. D: Startup scenario #3.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 6 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Characterization
General Information
temperature of 125°C as indicated by the thermal
measurement
The converter has been characterized for many
operational aspects, to include thermal derating
(maximum load current as a function of ambient
temperature and airflow), efficiency, startup and
shutdown parameters, output ripple and noise,
transient response to load step-change, overcurrent,
and short circuit.
(ii) The output current at which the temperature at
the thermocouple locations TC and TC1 do not exceed
125°C and 110°C respectively. (Figure E)
(iii) The nominal rating of the converter (20A/240W).
The following pages contain specific plots or
waveforms associated with the converter. Additional
comments for specific data are provided below.
Thermocouples (TC)
TC1
Test Conditions
All data presented were taken with the converter
soldered to a test board, specifically a 0.060” thick
printed wiring board (PWB) with four layers. The top
and bottom layers were not metalized. The two inner
layers, comprised of two-ounce copper, were used to
provide traces for connectivity to the converter.
Thermocouple (TB)
Area
The lack of metallization on the outer layers as well
as the limited thermal connection ensured that heat
transfer from the converter to the PWB was
minimized. This provides a worst-case but consistent
scenario for thermal derating purposes.
Fig. E: Locations of the thermocouples for thermal testing.
Thermal Derating – Baseplate Cooled (p/n: -xGxBx)
All measurements requiring airflow were made in the
vertical and horizontal wind tunnel using Infrared (IR)
thermography and thermocouples for thermometry.
The maximum load current rating vs. baseplate
temperature is provided in Figure 4.
The ambient temperature was maintained ≤ 85°C,
with an airflow rate of ≤ 30LFM (≤ 0.15m/s).
Ensuring components on the converter do not
exceed their ratings is important to maintaining high
reliability. If one anticipates operating the converter
at or close to the maximum loads specified in the
derating curves, it is prudent to check actual
Thermocouple measurements were maximized, as
above, to the following limits:
TC ≤ 125°C, TC1 ≤ 110°C & TB ≤ 105°C.
The user should design for TB ≤ 105°C.
operating
temperatures
in
the
application.
Thermographic imaging is preferable; if this
capability is not available, then thermocouples may
be used. The use of AWG #36 gauge thermocouples
is recommended to ensure measurement accuracy.
Careful routing of the thermocouple leads will further
minimize measurement error. Refer to Figure E for
the optimum measuring thermocouple location.
Efficiency
Figure 5 shows the efficiency vs. load current plot for
ambient temperature (TA) of 25ºC, airflow rate of
300LFM (1.5m/s) with vertical mounting and input
voltages of 36V, 48V, 65V and 75V.
Power Dissipation
Figure 6 shows the power dissipation vs. load
current plot for TA=25ºC, airflow rate of 300LFM
(1.5m/s) with vertical mounting and input voltages of
36V, 48V, 65V and 75V.
Thermal Derating – Air Cooled
Load current vs. ambient temperature and airflow
rates are given in Figures 1 - 3. Ambient temperature
was varied between 25°C and 85°C, with airflow
rates from 30 to 500LFM (0.15 to 2.5m/s).
Startup
For each set of conditions, the maximum load
current was defined as the lowest of:
Output voltage waveforms, during the turn-on
transient using the ON/OFF pin for full rated load
currents (resistive load) are shown with and without
external load capacitance in Figure 7 and Figure 8,
respectively.
(i) The output current at which any FET junction
temperature does not exceed
a
maximum
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 7 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Ripple and Noise
Figure 1010 shows the output voltage ripple waveform,
measured at full rated load current with a 10µF
tantalum and a 1µF ceramic capacitor across the
output. Note that all output voltage waveforms are
measured across the 1µF ceramic capacitor.
The input reflected-ripple current waveforms are
obtained using the test setup shown in Figure 11 The
corresponding waveforms are shown in Figure 12 and
Figure 13.
Figure 3. Power derating of SQE48T20120 converter with
baseplate option and 0.91” tall horizontal-fin
heatsink. (Conditions: same as Fig. 1)
Figure 1. Available load current vs. ambient air temperature
and airflow rates for SQE48T20120 converter
mounted vertically with air flowing from pin 3 to
pin 1, MOSFET temperature 125 C, Vin = 48 V.
Figure 4. Power derating of SQE48T20120 converter with
baseplate option and coldplate cooling.
Figure 2. Power derating of SQE48T20120 converter with
baseplate option and 0.25” tall horizontal-fin
heatsink. (Conditions: same as Fig. 1)
(Conditions: TB ≤ 105°C, TA ≤ 85°C,
Air velocity ≤ 30LFM (≤ 0.15m/s), Vin = 48 V.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 8 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Figure 7. Turn-on waveform at full rated load current
(resistive) with 10,000 uF output capacitor at
Vin=48V, triggered via ON/OFF pin. Top trace:
ON/OFF signal (10V/div.). Bottom trace: Output
voltage (2V/div.). Time scale: 5ms/div.
Figure 5. Efficiency vs. load current and input voltage for
SQE48T20120 converter mounted vertically with air
flowing from pin 3 to pin 1 at 300 LFM (1.5 m/s) and
Ta=25C.
Figure 8. Turn-on waveform at full rated load current
(resistive) with 10uF tant. + 1uF cer. output
Figure 6. Power dissipation vs. load current and input
voltage for SQE48T20120 converter mounted
vertically with air flowing from pin 3 to pin 1 at 300
LFM (1.5 m/s) and Ta=25C.
capacitor at Vin=48V, triggered via ON/OFF pin.
Top trace: ON/OFF signal (10V/div.). Bottom trace:
Output voltage (2V/div.). Time scale: 5ms/div.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 9 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Figure 11. Test setup for measuring input reflected ripple
currents, ic and is.
Figure 9. Output voltage response to load current step-
change (10A – 15A – 10A) at Vin = 48 V.
Top trace: output voltage (100mV/div.)
Bottom: load current (5A/div.).
Current slew rate: 0.1 A/µs. Time scale: 0.1ms/div.
Co = 10µF tantalum + 1µF ceramic
Figure 12. Input reflected-ripple current, i (50 mA/div.),
s
measured through 100 µH at the source at full
rated load current and Vin = 48 V. Refer to 11
for test setup. Time scale: 1 µs/div.
Figure 10. Output voltage ripple (50 mV/div.) at full rated
load current into a resistive load with Co = 10µF
tantalum + 1µF ceramic and Vin =48V. Time scale:
1µs/div.
Figure 13. Input reflected ripple-current, i (200 mA/div.),
c
measured at input terminals at full rated load
current and Vin = 48 V. Refer to Figure 11 for
test setup. Time scale: 1 µs/div.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 10 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Comp.
Des.
Description
C1, C2,
C6
C3
L1, L2
C4, C5
(2EA, 6 capacitors)
1uF, 100V ceramic cap
33uF, 100V electrolytic cap
0.59mH, Pulse P0353NL
2,200Pf, ceramic cap
Figure 14. Typical input EMI filter circuit to attenuate conducted emissions.
Figure 15. Input conducted emissions measurement (Typ.) of SQE48T20120.
Conditions: VIN=48VDC, IOUT = 20AMPS
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 11 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Physical Information
SQE48T Pinout (Through-hole)
Pad/Pin Connections
Pad/Pin #
Function
1
2
3
4
5
VIN (+)
ON/OFF
VIN (-)
VOUT (-)
VOUT (+)
SQE48T Platform Notes
All dimensions are in inches [mm]
Pins 1-3 are Ø 0.040” [1.02]
with Ø 0.076” [1.93] shoulder
Pins 4 and 5 are Ø 0.062” [1.57]
with are Ø 0.096” [2.44] shoulder
Pin Material: Brass Alloy 360
Pin Finish: Tin over Nickel
HT
CL
PL
Pin
Option
Height
Option
(Max. Height) (Min. Clearance)
+0.020 [+0.51]
-0.010 [- 0.26]
Pin Length
+0.016 [+0.41]
-0.000 [- 0.00]
±0.005 [±0.13]
A
B
0.188 [4.78]
0.145 [3.68]
D
0.420 [10.67]
0.040 [1.02]
SQE48T Outline (Through-hole w/ Heat Spreader Option p/n: -xGxBx)
HT
CL
Height
(Max. Height) (Min. Clearance)
+0.020 [+0.51]
-0.010 [- 0.26]
+0.016 [+0.41]
-0.000 [- 0.00]
Option
G
0.500 [12.7]
0.040 [1.02]
Heat Spreader Interface Information
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 12 of 13
SQE48T20120 DC-DC Converter
36-75 VDC Input; 12 VDC @ 20 A Output
Preliminary Data Sheet
Converter Part Numbering/Ordering Information
Maximum Pin
Height Length Special Features
Product Input Mounting Rated Output
Series Voltage Scheme Current Voltage
ON/OFF
Logic
RoHS
[HT]
[PL]
SQE
48
T
20
120
-
N
G
A
B
G
No Suffix
0 2250VDC
isolation, no CM
cap
RoHS
lead-solder-
exemption
compliant
Through
hole
N
Negative
D
0.42”
One-
Eighth
Brick
T
Through-
hole
20 120
20 ADC 12V
K 1500VDC
isolation, (w/CM
cap.)
36-75 V
A
0.188”
B
G
0.50”
G
RoHS
compliant
for all six
substances
Format
P
Positive
0.145”
B Baseplate
option + ‘0’ above
The example above describes P/N SQE48T20120-NGABG: 36-75V input, through-hole, 20A@12V output, negative ON/OFF logic, maximum
height of 0.50”, 0.188” pin length, 2250VDC isolation, no common mode capacitor, RoHS compliant for all 6 substances and integral heat
spreader (Baseplate). Consult factory for availability of other options.
Notes:
1. NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional president of Power-One, Inc.
2. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending
on the date manufactured. Specifications are subject to change without notice.
MCD10157 Rev. 1.0, 12-May-10
www.power-one.com
Page 13 of 13
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