75QBW4_2.25 Series
75W - Single Output DC-DC Converter - Wide Input - Isolated & Regulated
DC-DC Converter
75W
The 75QBW4_2.25 series contains isolated 75W DC-DC products with 4:1 input vol-
tage. They feature efficiency up to 93%, 2250VDC isolation, operating temperature
of -40°C to +85°C, input under-voltage protection, output short circuit protection,
over-current protection, over-voltage protection, over-temperature protection
and EMI meets CISPR32/EN55032 CLASS B by add module recommended circuit.
Wide input voltage range: 4:1
Efficiency up to 93%
Input under-voltage, output
over-voltage, over-current,
over-temperature protection
International standard
pin-out: 1/4 brick
Five-sided metal shielding
package
Isolation voltage 2.25KVDC
Operating temperature range:
-40°C ~ +85°C
Short circuit protection (SCP)
They are widely applied in battery power supplies, industrial control, electricity,
instruments, railway, communication, intelligence robot fields.
Common specifications
Short circuit protection:
Temperature rise at full load:
Cooling:
Input specifications
Hiccup, continuous, self-recovery
25°C TYP
Item
Test condition
Nominal input
Min
-0.7
Typ
Max
Units
Input current
(Full load/no load)
1698/50 1756/80 mA
mA
mA
Natural convection (20FLM)
-40°C ~ +85°C
Operation temperature range:
Over-temperature Protection:
Trim:
Reflected ripple
current
Nominal input
(1sec max)
30
mA
Base-Plate Temperature 105°C typ.
95%Vo min., 110%Vo max.
105%Vo max.
Surge voltage
90
18
VDC
VDC
Start-up Threshold
Voltage
Sense:
Storage temperature range:
Pin welding resistance temperature:
-55°C ~ +125°C
Under-voltage
protection
• 5/15VDC output 16
• Others
16.5
15.5
VDC
260°C MAX, wave soldering for 10 sec.
300°C MAX, 1.5mm from case for 10 sec.
15
Filter
Ctrl*
PI filter
Storage humidity range:
Vibration:
Non-condensing < 95%RH
• Module switch
on
• Module switch
off
• Input current
when switched off
• Ctrl suspended or connected to
TTL high level (3.5-12VDC)
• Ctrl connected to -Vin or low level
(0-1.2VDC)
IEC/EN61373 car body 1 B mold
Casing material:
Black flame-retardant and heat-
resistant plastic (UL94-V0)
• 2mA typ., 10mA max.
Switching frequency:
MTBF (MIL-HDBK-217F @25°C):
Dimension:
PWM mode, 250KHz typ.
500 Khours min.
Hot-plug
Unavailable
61.8*40.2*12.7mm (no heatsink)
62.0*56.0*14.6mm (with aluminium
bottom case)
* The voltage of Ctrl pin is relative to input pin GND.
61.8*40.2*27.7mm (with heatsink)
Isolation specifications
Weight:
83g (no heatsink)
Item
Test condition
Min
Typ
Max
Units
103g (with aluminium bottom case)
114g (with heatsink)
Insulation voltage*
• Input-output
• Input-case
• Output-case
2250
1500
500
VDC
VDC
VDC
* For 75QBW4_4805S2.25 and 75QBW4_4815S2.25, trim function meets output up
to 10% or sense function meets output up to 5%, Vin needs to exceed 20VDC.
Insulation resistance
Test at 500VDC
100
MΩ
pF
Isolation Capacitance Input/output,
100KHz/0.1V
2200
Example:
75QBW4_4812S2.25
75= 75 Watt; QB= Quarter Brick; W4= Wide input (4:1); 48= 18-75Vin;
12Vout; S= Single Output; 2.25= 2250 VDC Insulation
* Input-output, with the test time of 1 minute and the leak current less than 1mA
Page 1 of 7
75QBW4_2.25 – Rev. 2017-1.1
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
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