50QBTW12_2.25 Series
50W - Single Output - Wide Input - Isolated & Regulated
DC-DC Converter
DC-DC Converter
50 Watt
High efficiency
Isolation 2250V Input-to-
The 50QBTW12_2.25 converter series is composed of isolated, board-
mountable, fixed switching frequency dc-dc converters that use synchro-
nous rectification to achieve extremely high power conversion efficiency.
These DC-DC converter modules use advanced power processing, control
and packaging technologies to enhance the performance, flexibility, reli-
ability and cost effectiveness of mature power components. Each modu-
le is six-sided metal case enclosed to provide protection from the harsh
environments seen in many industrial and transportation applications.
Fixed switching frequency
provides predictable EMI
No life-span constrained
capacitor inside
output (optional 3000V)
Fully protected: OVP, OTP,
OCP and UVLO
Output voltage trim range of
-10%, +10%
4:1 & 8:1 & 12:1 Ultra-Wide
input range
Single, dual, & multiple out-
puts available
RoHS compliant
Common specifications
Short circuit protection:
Cooling:
Output specifications
Hiccup, continous, automatic recovery
Free air convection
-45°C~+115°C
Item
Test condition
VNOM 50% Load
Min
Typ
Max
1.5
Units
%
Output voltage
accuracy
Operation case temperature:
Storage temperature range:
Over temperature protection:
Storage humidity range:
Switching frequency:
Case material:
Line regulation
Load regulation
Minimum load
Low line to high line
10% to 100% load
0.3
0.5
%
%
-55°C~+125°C
120°C TYP, auto recovery
95% MAX, non-condensing
VNOM : 220kHz MIN, 330kHz MAX
Aluminium
• Single output
• Dual output
0
10
%
%
Ripple&Noise
20MHz Bandwidth and
with 1uF MLCC. Output
Capacitor each output
1.5
%
MTBF (BellCore-TR-332 @50˚C G.B):
Weight:
TBD (M HR)
Temperature drift
0.04 %/°C
µs
TBD (g)
Transient recovery 25% load step change
time
800
2
Dimensions:
39.7 x 60 x 12.9mm
Transient peak
deviation
ΔIo/Δt=2.5A/us
%Vo
msec
VDC
%
Input specifications
Start-up time
When use enable
function
20
Item
Test condition
Min
Typ
Max
Units
Transient input voltage
ranges (100ms max)
• 50QBTW4_24xx
• 50QBTW4_48xx
• 50QBTW12_72xx
50
VDC
VDC
VDC
Trimming output
voltage
VNOM 10% Load
VNOM 10% Load
VNOM
10%
80
160
Over voltage
protection
120
120
Operating input voltage • 50QBTW4_24xx
ranges
9
18
28
54
36
VDC
VDC
VDC
• 50QBTW4_48xx
• 50QBTW12_72xx
9
75
Output power
protection
%
14
154
Under voltage lockout
- Start-up voltage -
• 50QBTW4_24xx
• 50QBTW4_48xx
• 50QBTW12_72xx
9
VDC
VDC
VDC
9
14
Under voltage lockout
- Shutdown voltage -
• 50QBTW4_24xx
• 50QBTW4_48xx
• 50QBTW12_72xx
7
VDC
VDC
VDC
Example:
7
50QBTW12_7205S2.25
12
50= 50Watt; QB= Quarter Brick; TW= series; W12= ultra wide input
(12:1) 14-154Vin; 5Vout; S= single output; 2.25=2250VDC
Input current
See model selection guide
Standby mode (OFF, UVLO) 5mA
Enable function input
Positive logic
• ON
• OFF
Open or 8 ~ 20 VDC
Short or 0 ~ 1.2 VDC
Note:
1. Min. load shouldn‘t be less than 5%, otherwise ripple maybe increase
dramatically. Operation under minimum load will not damage the converter,
however, they may not meet all specification listed.
2. All specifications are measured at TA=25°C, humidity<75%, nominal input
voltage and rated output load unless otherwise specified.
Negative logic
• ON
• OFF
Short or 0 ~ 1.2 VDC
Open or 8 ~ 20 VDC
3. It is recommended to protect the input by fuses or other protection devices.
4. In this datasheet, all the test methods of indications are based on corporate
standards.
5. All characteristics are for listed model, non-standard models may perform
differently, please contact our technical person for more detail.
6. Specifications subject to change without prior notice.
Isolation specifications
Item
Test condition
Min
Typ
Max Units
Isolation voltage
Tested for 1 minute
Additonal option for
50QBTW12_7205S3:
2250
VDC
3000
100
VDC
MΩ
pF
Isolation resistance
500VDC, 70% RH
Isolation capacitance
1500
Page 1 of 3
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
50QBTW12_2.25 – Rev. 2018-1.0
Specifications subject to change without notice.