QT8A_1.5UP Series
0.25W - Single Output DC-DC Converter - Fixed Input - Isolated & Unregulated
DC-DC Converter
0.25 Watt
1500VDC isolation
Compact SMD package
Internal SMD construction
Industry standard pinout
RoHS Compliance
The QT8A_1.5UP series is specially designed for applications where an
Efficiency up to 77%
Operating temperature range:
-40°C ~ +105°C
isolated voltage is required in a distributed power supply system.
These products apply to:
Low ripple & noise
Short circuit protection (SCP)
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 ≤1500VDC)
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
Continuous, automatic recovery
20°C TYP
Item
Test condition
Min
Typ
Max
Units
Output voltage
accuracy
See tolerance envelope graph
Free air convection
-40°C~+105°C
Line regulation
For Vin change of 1ꢀ
• 3.3V output
• other output
Operation temperature range:
Storage temperature range:
Lead temperature:
1.5
1.2
ꢀ
ꢀ
-55°C ~+125°C
Load regulation
10ꢀ to 100ꢀ load
• 3V output
• 5V/9V output
• 12V/15V output
300°C MAX, 1.5mm from case for 10 sec
15
12
7
20
15
10
ꢀ
ꢀ
ꢀ
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.
Temperature drift
Ripple & Noise*
100ꢀ full load
0.03
ꢀ/°C
Storage humidity range:
Case material:
MTBF:
< 95ꢀ
20MHz Bandwidth
10&
20
120
mVp-p
Epoxy Resin [UL94-V0]
>3,500,000 hours
12.70*11.20*7.25 mm
1.5g
Switching frequency Full load, nominal input
100
300
KHz
Dimensions:
Weight:
* Test ripple and noise by “parallel cable” method. See detailed operation
instructions at application notes.
* Supply voltage must be discontinued at the end of short circuit duration for
QT8A_03xx series.
EMC specifications
EMI
EMI
EMS
CE
CISPR22/EN55022
CLASS B (see EMC recommended circuit)
Input specifications
RE
CISPR22/EN55022
CLASS B (see EMC recommended circuit)
Item
Test condition
Min
Typ
Max
Units
Input current
(full load/no load)
• 5V input
• 12V input
• 24V input
68/15
27/10
15/8
mA
mA
mA
ESD
IEC/EN61000-4-2
perf. Criteria B
Contact 8KV
Reflected ripple
current
• 5V input
20
5
mA
mA
• 12V/24V input
Example SIP4 Case:
QT8A_0505S1.5UP
Q= 0,25 Watt; T8= SMT8; A= Pinning; 05= 5Vin; 05= 5Vout;
S= Single Output; 1.5= 1.5kVDC Isolation; U= Unregulated Output
P= Short circuit protection
Input surge voltage
(1sec. max.)
• 5V input
• 12V input
• 24V input
-0.7
-0.7
-0.7
9
VDC
VDC
VDC
18
30
Input filter
Capacitor 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 vol tage 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
1500
Isolation resistance
Test at 500VDC
1000
MΩ
pF
Isolation capaci-
tance
Input-output,
100KHz/0.1V
Page 1 of 4
QT8A_1.5UP – Rev. 2018-1.2
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
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