QT8E_1U Series
0.25W - Single Output DC-DC Converter - Fixed Input - Isolated & Unregulated
DC-DC Converter
0.25 Watt
1000VDC isolation
Efficiency up to 72%
Operating temperature range:
-40°C ~ +85°C
SMD package
The QT8E_1U series is specially designed for applications where an isola-
Industry standard pinout
RoHS Compliance
ted voltage is required in a distributed power supply system.
High Power Density
External component required
These products apply to:
Small footprint
1) Where the voltage of the input power supply is fixed
(Voltage variation ≤ 10ꢀ)
2) Where isolation is necessary between input and output
(Isolation voltage ≤1000VDC)
3) Where the regulation of the output voltage and the output ripple
noise are not demanding.
Such as: pure digital circuits, low frequency analog circuits, and relay-
driven circuits.
Common specifications
Short circuit protection:
Temperature rise at full load:
Cooling:
Output specifications
Short term, 1 sec.
Item
Test condition
Min Typ
Max
5
Units
ꢀ
15°C TYP
Voltage tolerance
Line regulation
Load regulation
100ꢀ full load
Free air convection
-40°C~+85°C
For Vin change of 1ꢀ
1.2
15
ꢀ
Operation temperature range:
Storage temperature range:
Lead temperature:
10ꢀ to 100ꢀ load
• 3V output
• 5V/9V output
• 12V/15V output
ꢀ
ꢀ
ꢀ
-55°C ~+125°C
15/9
7.5/7
300°C MAX, 1.5mm from case for 10 sec
Temperature drift
Ripple & Noise*
100ꢀ full load
0.03 ꢀ/°C
Reflow Soldering Temperature:
Peak temp. ≤245°C, maximum duration
time ≤60s at 217°C. For actual application,
please refer to IPC/JEDEC J-STD-020D.1.
20MHz Bandwidth
50ꢀ load step charge
100
mVp-p
µs
Transient response
setting time
350
100
Storage humidity range:
Case material:
< 95ꢀ
DAP
Switching frequency Full load, nominal input
KHz
MTBF (MIL-HDBK-217F@25°C):
Weight:
>3,500,000 hours
1g
* Test ripple and noise by “parallel cable” method. See detailed operation
instructions at application notes.
Dimensions:
12.7x7.6x6.25mm
Input specifications
Example SIP4 Case:
QT8E_0505S1U
Item
Test condition
Capacitor
Min
Typ
Max
10
Units
ꢀ
Q= 0,25 Watt; T8= SMT8; E= Pinning; 05= 5Vin; 05= 5Vout;
S= Single Output; 1= 1kVDC Isolation; U= Unregulated Output
Voltage tolerance
Input filter
Note:
Isolation specifications
1. Operation under minimum load will not damage the converter; However, they
may not meet all specifications.
2. Max. Capacitive Load is tested at nominal input voltage and full load.
3. Unless otherwise noted, All specifications are measured at Ta=25°C,
humidity<75ꢀ, nominal input voltage and rated output load.
4. In this datasheet, all test methods are based on our corporate standards.
5. All characteristics are for listed models, and non-standard models may perform
differently. Please contact our technical support for more detail.
6. Please contact our technical support for any specific requirement.
7. Specifications of this product are subject to changes without prior notice.
Item
Test condition
Min
Typ
20
Max
Units
VDC
Isolation voltage
Tested for 1 minute
and 1mA max
1000
Isolation resistance
Test at 500VDC
1000
MΩ
pF
Isolation capacitance Input-output,
100KHz/0.1V
Page 1 of 3
QT8E_1U – Rev. 2018-1.1
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com