The new SSQE48T07050 DC-DC converter is an open frame sixteenthbrick DC-DC converter that conforms to the Distributed Open
Standards Architecture (DOSA) specifications. The converter operates
over an input voltage range of 36 to 75 VDC, and provides a tightly
regulated output voltage with an output current up to 7 A. The output
is fully isolated from the input and the converter meets Basic Insulation
requirements permitting a positive or negative output configuration.
The converter is constructed using a single-board approach with both
planar and discrete magnetics. The standard feature set includes
remote On/Off (positive or negative logic), input undervoltage lockout,
output overvoltage, overcurrent, and short circuit protections, output
voltage trim, and overtemperature shutdown with hysteresis.
With standard pinout and trim equations and excellent thermal
performance, the SSQE48T07050 converters can replace in most
cases existing eighth-brick converters. Inclusion of this converter in a
new design can result in significant board space and cost savings.
•
36-75 VDC Input; 5 VDC @ 7 A Output
•
Industry-standard DOSA pinout
•
On-board input differential LC-filter
•
Start-up into pre-biased load
•
No minimum load required
•
Withstands 100 V input transient for 100 ms
•
Fixed-frequency operation
•
Hiccup overcurrent protection
•
Fully protected (OTP, OCP, OVP, UVLO)
•
Remote sense
•
Remote ON/OFF positive or negative logic option
•
Output voltage trim range: +10%/−20% with industry-standard trim
equations
•
Designed to meet Class B conducted emissions per FCC & EN 55032
when used with external filter
•
All materials meet UL94, V-0 flammability rating
•
Approved to the latest edition and amendment of ITE Safety standards,
UL/CSA 62368-1 and IEC 62368-1
•
RoHS lead free solder and lead-solder-exempted products are
available
SSQE48T07050
2
Conditions: TA = 25ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin = 33 µF, unless otherwise specified.
Absolute Maximum Ratings
Input Voltage
0
80
VDC
Operating Ambient Temperature
Continuous
-40
85
°C
Storage Temperature
-55
125
°C
Isolation Characteristics
I/O Isolation
2250
Isolation Capacitance
VDC
150
Isolation Resistance
pF
10
MΩ
Feature Characteristics
Switching Frequency
440
Output Voltage Trim Range1
Remote Sense Compensation
Industry-standard equations (5.0 V)
1
Percent of VOUT(NOM)
Output Overvoltage Protection
Non-latching
Overtemperature Shutdown (PCB)
Non-latching
Peak Back-drive Output Current during
startup into pre-biased output
Back-drive Output Current in OFF state
-20
120
Applies to all protection features
Turn-On Time
See Figures E, F, and G
+10
%
+10
%
140
125
Sinking current from external voltage source
equal VOUT(NOM) – 0.6 V and connected to
output via 1 Ohm resistor
Converter is OFF;
External voltage = 5 VDC
Auto-Restart Period
130
kHz
%
°C
50
mADC
10
mADC
200
ms
5
ms
Converter Off (logic low)
-20
0.8
VDC
Converter On (logic high)
2.4
20
VDC
Converter Off (logic high)
2.4
20
VDC
Converter On (logic low)
-20
0.8
VDC
ON/OFF Control (Positive Logic)
ON/OFF Control (Negative Logic)
Mechanical
Dimensions
Weight
0.9 x 1.3 x 0.374
in
12.3
g
Reliability
Telcordia SR-332, Method I Case 1
50% electrical stress, 40°C ambient
MTBF
16.23
MHrs
1
Vout can be increased up to 10% via the sense leads or 10% via the trim function. However, the total output voltage trim from all
sources shall not exceed 10% of VOUT(nom) in order to ensure specified operation of overvoltage protection circuitry.
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SSQE48T07050
3
MIN
TYP
MAX
UNITS
36
48
75
VDC
Turn-on Threshold
34
35
36
VDC
Turn-off Threshold
32
33
34
VDC
Input Characteristics
Operating Input Voltage Range
Input Under-voltage Lockout
Input Voltage Transient
100 ms
100
VDC
Maximum Input Current
VIN = 36 VDC , IOUT = 7 ADC
1.2
ADC
Input Stand-by Current
Vin = 48V, converter disabled
10
mA
Input No Load Current (0 load on the output) Vin = 48V, converter enabled
32
mA
Input Reflected-Ripple Current, is
Vin = 48V, 25 MHz bandwidth
10
mAPK-PK
Input Voltage Ripple Rejection
120 Hz
90
dB
Output Characteristics
External Load Capacitance
Plus full resistive load
Output Current Range
5.0 VDC
Current Limit Inception
Non-latching, for 5.0 VDC
Peak Short-Circuit Current
Non-latching, Short = 10 mΩ
9.8
A
RMS Short-Circuit Current
Non-latching
1.2
Arms
Output Voltage Setpoint Accuracy (no load)
10,000
µF
0
7
ADC
7.7
9.8
ADC
-1.6
+1.6
%VOUT
Over Line
±2
±5
mV
Over Load
±2
±5
mV
+3
%Vout
100
mVPK-PK
Output Regulation
Overall Output Voltage Regulation
Over line, load and temperature2
Output Ripple and Noise – 25 MHz
bandwidth
Full load + 10 µF tantalum + 1 µF ceramic
65
Co = 1 µF ceramic + 10 uF tantalum
Figure 8
100
mV
40
µs
80
mV
80
µs
-3
Dynamic Response
Load Change 50%-75%-50% of Iout Max,
di/dt = 0.1 A/μs
Settling Time to 1% of Vout
Load Change 50%-75%-50% of Iout Max ,
di/dt = 5 A/μs
Co = 470 µF POS + 1 µF ceramic
Figure 9
Settling Time to 1% of Vout
Efficiency
100% Load
VOUT = 5.0 VDC
91
%
50% Load
VOUT = 5.0 VDC
88.5
%
2
Operating ambient temperature range is -40ºC to 85ºC
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SSQE48T07050
4
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 33 µF electrolytic capacitor with an ESR < 1 Ω across the input is
recommended to ensure stability of the converter over the wide range of input source impedance.
In many applications, the user has to use decoupling capacitance at the load. The power converter will exhibit stable
operation with external load capacitance up to 10,000 µF.
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, both referenced to Vin(-). A typical connection is shown in Fig. A.
Vin (+)
SSQE48 Converter
(Top View)
Vout (+)
SENSE (+)
ON/OFF
Vin
TRIM
Rload
SENSE (-)
Vin (-)
Vout (-)
CONTROL
INPUT
Figure A. 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 the pin is 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.
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.
The ON/OFF pin is internally pulled up to 5 V 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.
The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the converter
and the load. The SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should be connected at the load or at the point where regulation
is required (see Fig. B).
SSQE48 Converter
Vin (+)
(Top View)
Rw
Vout (+)
100
SENSE (+)
Vin
ON/OFF
TRIM
Rload
SENSE (-)
10
Vin (-)
Vout (-)
Rw
Figure B. Remote sense circuit configuration.
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SSQE48T07050
5
CAUTION
If remote sensing is not utilized, the SENSE(-) pin must be connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin must
be connected to the Vout(+) pin (Pin 8) to ensure the converter will regulate at the specified output voltage. If these connections
are not made, the converter will deliver an output voltage that is slightly higher than the specified data sheet value.
Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces
should be run side by side and located close to a ground plane to minimize system noise and ensure optimum performance.
The converter’s output overvoltage protection (OVP) senses the voltage across Vout(+) and Vout(-), and not across the sense
lines, so the resistance (and resulting voltage drop) between the output pins of the converter and the load should be minimized
to prevent unwanted triggering of the OVP.
When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability
of the converter, which is equal to the product of the nominal output voltage and the allowable output current for the given
conditions.
When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating
in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum
current (originally obtained from the derating curves) by the same percentage to ensure the converter’s actual output power
remains at or below the maximum allowable output power.
The output voltage can be adjusted up 10% or down 20%. Trim up to 10% is guaranteed only at Vin ≥ 40 V, and it is
approximately 8% to 10% at Vin = 36 V.
The TRIM pin should be left open if trimming is not being used. To minimize noise pickup, a 0.1 µF capacitor is connected
internally between the TRIM and SENSE(-) pins.
To increase the output voltage, refer to Fig. C. A trim resistor, RT-INCR, should be connected between the TRIM (Pin 6) and
SENSE(+) (Pin 7), with a value of:
RT−INCR =
5.11(100 + Δ)VO−NOM − 626
− 10.22
1.225Δ
[kΩ]
where,
RT−INCR = Required value of trim-up resistor [kΩ]
VO−NOM = Nominal value of output voltage [V]
Δ=
(VO -REQ − VO -NOM )
X 100
VO -NOM
[%]
VO−REQ = Desired (trimmed) output voltage [V].
When trimming up, care must be taken not to exceed the converter‘s maximum allowable output power. See the previous
section for a complete discussion of this requirement.
Vin (+)
SSQE48 Converter
Vout (+)
(Top View)
SENSE (+)
Vin
ON/OFF
R T-INCR
TRIM
Rload
SENSE (-)
Vin (-)
Vout (-)
Figure C. Configuration for increasing output voltage.
To decrease the output voltage (Fig. D), a trim resistor, RT-DECR, should be connected between the TRIM (Pin 6) and SENSE(-)
(Pin 5), with a value of:
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6
RT−DECR =
511
− 10.22
|Δ|
[kΩ]
where,
RT−DECR = Required value of trim-down resistor [kΩ]
and
Δ is defined above.
Note:
The above equations for calculation of trim resistor values match those typically used in conventional industry-standard
quarter-bricks, eighth-bricks and sixteenth-bricks.
Vin (+)
SSQE48 Converter
Vout (+)
(Top View)
SENSE (+)
Vin
ON/OFF
TRIM
Rload
RT-DECR
SENSE (-)
Vin (-)
Vout (-)
Figure D. Configuration for decreasing output voltage.
Trimming/sensing beyond 110% of the rated output voltage is not an acceptable design practice, as this condition could
cause unwanted triggering of the output overvoltage protection (OVP) circuit. The designer should ensure that the difference
between the voltages across the converter’s output pins and its sense pins does not exceed 10% of VOUT(nom), or:
[VOUT(+) − VOUT(−)] − [VSENSE(+) − VSENSE(−)] VO - NOM X 10% [V]
This equation is applicable for any condition of output sensing and/or output trim.
Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below
a pre-determined voltage.
The input voltage must be typically 35 V for the converter to turn on. Once the converter has been turned on, it will shut off
when the input voltage drops typically below 33 V. This feature is beneficial in preventing deep discharging of batteries used
in telecom applications.
The converter is protected against overcurrent or short circuit conditions. Upon sensing an overcurrent condition, the
converter will switch to constant current operation and thereby begin to reduce output voltage. During short circuit, when the
output voltage drops significantly below 50% its nominal value, the converter will shut down.
Once the converter has shut down, it will attempt to restart nominally every 200 ms with a very low duty cycle. The attempted
restart will continue indefinitely until the overload or short circuit conditions are removed.
Once the output current is brought back into its specified range, the converter automatically exits the hiccup mode and
continues normal operation.
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SSQE48T07050
7
The converter will shut down if the output voltage across Vout(+) (Pin 8) and Vout(-) (Pin 4) 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 200 ms until the OVP condition is removed.
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. Converter will
automatically restart after it has cooled to a safe operating temperature.
The converters are safety approved to UL/CSA62368-1, EN62368-1 and IEC62368-1. Basic Insulation is provided between
input and output.
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 belfuse.com/powersolutions 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.
Abnormal and component failure tests were conducted with the input protected by a 5 A fuse. If a fuse rated greater than
5A 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.
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, Bel Power Solutions tests its converters to several system
level standards, primary of which is the more stringent EN 55032, 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.
With the addition of a simple external filter, all versions of the SSQE48T07050 converters pass the requirements of Class B
conducted emissions per EN 55032 and FCC requirements. Please contact Bel Power Solutions Applications Engineering
for details of this testing.
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8
VIN
Scenario #1: Initial Startup From Bulk Supply
ON/OFF function enabled, converter started via application of
VIN. See Figure E.
Time
t0
Comments
ON/OFF pin is ON; system front-end power is
toggled on, VIN to converter begins to rise.
t1
VIN crosses undervoltage Lockout protection circuit
threshold; converter enabled.
t2
Converter begins to respond to turn-on command
(converter turn-on delay).
t3
Converter VOUT reaches 100% of nominal value.
For this example, the total converter startup time (t3- t1) is
typically 5 ms.
ON/OFF
STATE
OFF
ON
VOUT
t0
t1 t2
t
t3
Figure E. Startup scenario #1.
VIN
Scenario #2: Initial Startup Using ON/OFF Pin
With VIN previously powered, converter started via ON/OFF pin.
See Figure F.
Time
t0
t1
t2
Comments
VINPUT at nominal value.
Arbitrary time when ON/OFF pin is enabled
(converter enabled).
End of converter turn-on delay.
t3
Converter VOUT reaches 100% of nominal value.
For this example, the total converter startup time (t3- t1) is
typically 5 ms.
ON/OFF
STATE OFF
ON
VOUT
t0
t1 t2
t
t3
Figure F. Startup scenario #2.
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.
Comments
VIN and VOUT are at nominal values; ON/OFF pin ON.
ON/OFF pin arbitrarily disabled; converter output
falls to zero; turn-on inhibit delay period (200 ms
typical) is initiated, and ON/OFF pin action is
internally inhibited.
t2
ON/OFF pin is externally re-enabled.
If (t2- t1) ≤ 200 ms, external action of ON/OFF
pin is locked out by startup inhibit timer.
If (t2- t1) > 200 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.
t4
End of converter turn-on delay.
t5
Converter VOUT reaches 100% of nominal value.
For the condition, (t2- t1) ≤ 200 ms, the total converter startup
time (t5- t2) is typically 205 ms. For (t2- t1) > 200 ms, startup will
be typically 5 ms after release of ON/OFF pin.
V IN
Time
t0
t1
ON/OFF
STATE
200 ms
OFF
ON
V OUT
t0
t1
t2
t3 t4
t5
t
Figure G. Startup scenario #3.
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SSQE48T07050
9
The converters have been characterized for many operational aspects, to include thermal derating (maximum load current
as a function of ambient temperature and airflow) for vertical and horizontal mounting, efficiency, startup and shutdown
parameters, output ripple and noise, transient response to load step-change, overload, and short circuit.
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 metallized. The two inner layers, comprised of two-ounce copper,
were used to provide traces for connectivity to the converter.
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.
All measurements requiring airflow were made in the vertical and horizontal wind tunnel using Infrared (IR) thermography
and thermocouples for thermometry.
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 operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then
thermocouples may be used. The use of AWG #40 gauge thermocouples is recommended to ensure measurement accuracy.
Careful routing of the thermocouple leads will further minimize measurement error. Refer to Fig. H for the recommended
measuring thermocouple location.
Fig. H: Location of the thermocouple for thermal testing.
Load current vs. ambient temperature and airflow rates are given in Figure 1. Ambient temperature was varied between 25
°C and 85 °C, with airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s).
For each set of conditions, the maximum load current was defined as the lowest of:
(i)
(ii)
(iii)
The output current at which any FET junction temperature does not exceed a maximum specified temperature of 125°C
as indicated by the thermographic image, or
The temperature of the transformer does not exceed 125°C, or
The nominal rating of the converter.
During normal operation, derating curves with maximum FET temperature less or equal to 125°C should not be exceeded.
Temperature at thermocouple locations TC1 and TC2 shown in Fig. H should not exceed 100°C and 125°C respectively, in
order to operate inside the derating curves.
Figure 2 shows the efficiency vs. load current plot for ambient temperature of 25ºC, airflow rate of 300 LFM (1.5 m/s) with
vertical mounting and input voltages of 36 V, 48 V, 65 V, and 75 V. Also, a plot of efficiency vs. load current, as a function of
ambient temperature with Vin=48V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Figure 3.
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10
Figure 4 shows the power dissipation vs. load current plot for Ta = 25ºC, airflow rate of 300 LFM (1.5 m/s) with vertical
mounting and input voltages of 36 V, 48 V, 65 V, and 75 V. Also, a plot of power dissipation vs. load current, as a function
of ambient temperature with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Figure 5.
Output voltage waveforms during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are
shown without and with external load capacitance in Figure 6 and Figure 7, respectively.
Figure 10 shows the output voltage ripple waveform, measured at full rated load current with a 10 µF tantalum and 1µF
ceramic capacitor across the output. Note that all output voltage waveforms are measured across a 1µF ceramic capacitor.
The input reflected-ripple current waveforms are obtained using the test setup shown in Figure 11.
8
7
Load Current, A
6
5
4
3
NC ~ 30 LFM (0.15 m/s)
100 LFM (0.5 m/s)
200 LFM (1 m/s)
300 LFM (1.5 m/s)
400 LFM (2 m/s)
500 LFM (2.5 m/s)
2
1
0
20
30
40
50
60
70
80
90
Ambient Temperature, C
93
93
88
88
Efficiency, %
Efficiency, %
Figure 1. Available load current vs. ambient air temperature and airflow rates for SSQE48T07050 converter
mounted vertically with air flowing from pin 1 to pin 3, Vin = 48 V. Note: NC – Natural convection
83
36V
40C
48V
65V
78
83
78
55C
75V
75C
73
0
1
2
3
4
Load Current, A
5
6
7
Figure 2. Efficiency vs. load current and input voltage for
SSQE48T07050 converter mounted vertically with air flowing
from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and
Ta = 25C.
73
0
1
2
3
4
Load Current, A
5
6
7
Figure 3. Efficiency vs. load current and ambient temperature for
SSQE48T07050 converter mounted vertically with Vin = 48 V and
air flowing from pin 1 to pin 3 at a rate of 200LFM (1.0m/s).
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SSQE48T07050
11
5
36V
48V
4
Power Dissipation, W
Power Dissipation, W
5
65V
75V
3
2
4
40C
55C
75C
3
2
1
1
0
1
2
3
4
Load Current, A
5
6
7
0
1
2
3
4
Load Current, A
5
6
7
Figure 4. Power dissipation vs. load current and input voltage
for SSQE48T07050 converter mounted vertically with air
flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and
Ta = 25 C.
Figure 5. Power dissipation vs. load current and ambient
temperature for SSQE48T07050 converter mounted vertically with
Vin = 48 V and air flowing from pin 1 to pin 3at a rate of 200 LFM
(1.0 m/s).
Figure 6. Turn-on transient at full rated load current (resistive)
at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF
signal (5 V/div.). Bottom trace: Vout (2 V/div), Time: 5 ms/div.
Figure 7. Turn-on transient at full rated load current (resistive) plus
10,000 µF at Vin = 48 V, triggered via ON/OFF pin. Top trace:
ON/OFF signal (5 V/div) Bottom trace: Vout (2 V/div.),
Time: 5 ms/div.
Figure 8. Output voltage response to load current stepchange (3.5 A–5.25 A–3.5 A) at Vin = 48 V. Top trace: Vout
(100 mV/div.). Bottom trace: Iout (2 A/div.)., Time: (0.2 ms/div.)
Current slew rate: 0.1 A/µs. Co=1µF ceramic + 10µF tantalum.
Figure 9. Output voltage response to load current step-change
(3.5 A–5.25 A–3.5 A) at Vin = 48 V. Top trace: Vout (100 mV/div.).
Bottom trace: Iout (2 A/div.), Time: (0.2 ms/div.). Current slew rate:
5 A/µs. Co = 470 µF POS + 1 µF ceramic.
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12
iS
10 H
source
inductance
Vsource
iC
33 F
ESR < 1
electrolytic
capacitor
SSQE48
DC-DC
Converter
1 F
Ceramic
+ 10 F Vout
Tantalum
Capacitor
Figure 10. Output voltage ripple (20 mV/div.) at full rated load
current into a resistive load with Co = 10 µF tantalum + 1 µF
ceramic and Vin = 48 V. Time: 1μs/div.
Figure 11. Test setup for measuring input reflected ripple currents,
ic and is.
Figure 12. Input reflected-ripple current, iS (10 mA/div.),
measured through 10 µH at the source at full rated load
current and Vin = 48 V. Refer to Figure 11 for test setup. Time:
1 μs/div.
Figure 13. Input reflected ripple-current, iC (200 mA/div.),
measured at input terminals at full rated load current and
Vin = 48 V. Refer to Figure 11 for test setup. Time: 1μs/div.
Figure 14. Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
Figure 15. Load current (5 A/div.) into a 10 m short circuit during
restart, at Vin = 48 V. Time: 50 ms/div. Bottom trace is an
expansion of the on-time portion of the top trace (1 ms/div.)
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SSQE48T07050
13
PAD / PIN CONNECTIONS
Pad/Pin #
Function
1.300±0.020 [33.02±0.51]
0.100 [2.54]
0.150 [3.81]
1.100 [27.94]
0.600 [15.24]
0.150 [3.81] 4X
0.900±0.020 [22.86±0.51]
0.300 [7.62] 2X
1
Vin (+)
2
ON/OFF
3
Vin (-)
4
Vout (-)
5
SENSE(-)
6
TRIM
7
SENSE(+)
8
Vout (+)
PL
Pin Length
Pin
Option
±0.005 [±0.13]
A
0.188 [4.78]
B
0.145 [3.68]
C
0.110 [2.79]
SSQE48T Pinout (Through-hole)
SSQE48T Platform Notes
•
All dimensions are in inches [mm]
•
Pins 1-3 and 5-7 are Ø 0.040” [1.02] with Ø 0.078” [1.98] shoulder
•
Pins 4 and 8 are Ø 0.062” [1.57] without shoulder
•
Pin material: Brass
•
Pin Finish: Matte Tin over Nickel
•
Converter Weight: 0.44 oz [12.3 g]
PRODUCT
SERIES
INPUT
VOLTAGE
MOUNTING
SCHEME
RATED
LOAD
CURRENT
OUTPUT
VOLTAGE
SSQE
48
T
07
050
Sixteenth
Brick
Format
36-75 V
T
Throughhole
07
7 ADC
050
5.0 V
-
Height
Option
HT
(Max. Height)
+0.000 [+0.00]
-0.038 [- 0.97]
CL
(Min. Clearance)
+0.016 [+0.41]
-0.000 [- 0.00]
A
0.374 [9.5]
0.027 [0.7]
ON/OFF
LOGIC
MAXIMUM
HEIGHT
[HT]
PIN
LENGTH
[PL]
SPECIAL
FEATURES
N
A
B
N
N
Negative
P
Positive
A 0.374”
Through hole
A 0.188”
B 0.145”
C 0.110”
N Sink
current
during
start-up is
limited to
50 mA
RoHS
G
No Suffix
RoHS
lead-solderexemption
compliant
G RoHS
compliant for all
six substances
Example: The example above describes P/N SSQE48T07050-NABNG: 36-75 V input, through-hole, 7 A @ 5.0 V output, negative ON/OFF logic,
0.145” pins, maximum height of 0.374”, 50 mA current sink during start-up, and RoHS compliant for all 6 substances.
Consult factory for availability of other options.
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
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.
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+1 866 513 2839
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