QT8B_3UP Series
0.25W - Single Output DC-DC Converter - Fixed Input - Isolated & Unregulated
DC-DC Converter
0.25 Watt
3000VDC isolation
Industry standard pinout
RoHS Compliance
The QT8B_3UP miniature surface mounted DC-DC converters series are
an ideal and economical solution for many applications where noise
reduction, voltage isolation, voltage conversion in distributed power
systems is required. These converters are qualified for the higher tempe-
ratures requested by lead-free reflow solder processes, especially for
automated SMD production lines.
Efficiency up to 78%
Operating temperature
range: -40°C ~ +105°C
Power density 1.8W/cm3
Short circuit protection (SCP)
Small footprint
(over pins 1.37cm2)
These products apply to:
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 ≤3000VDC)
3) Where the regulation of the output voltage and the output ripple
noise are not demanding.
Common specifications
Short circuit protection:
Temperature rise at full load:
Cooling:
Output specifications
Continuos, automatic recovery
Item
Test condition
Min Typ
Max
1
Units
W
15°C TYP
Rated power
TA = 40°C to 85°C
See tolerance envelope
Free air convection
Voltage set point
accuracy
1.2
1.0
10
ꢀ
Operation temperature range:
Storage temperature range:
Lead temperature:
-40°C~+105°C
Line regulation
Load regulation
High Vin to low Vin
1.2
14
ꢀ
ꢀ
-55°C ~+125°C
10ꢀ to 100ꢀ load
• 3V output &
QT8B_03xx
300°C MAX, 1.5mm from case for 10 sec
Internal power dissipation:
Storage humidity range:
Case material:
610mW
• 5V output
13
8
6.5
6
15
9
7.5
7
ꢀ
ꢀ
ꢀ
ꢀ
< 95ꢀ
• 9V output
• 12V output
• 15V output
UL 94V-0
>2,000,000 hours
1.21g
MTBF (MIL-HDBK-217F@25°C):
Weight:
Temperature drift
Ripple & Noise*
100ꢀ full load
0.03 ꢀ/°C
20MHz Bandwidth
100
mVp-p
KHz
Switching frequency Full load, nominal input
120
Input specifications
* Test ripple and noise by “parallel cable” method. See detailed operation
instructions at application notes.
Item
Test condition
Min
Typ
Max
Units
Voltage range
• 3.3V input variants
• 5V input variants
• 12V input variants
• 15V input variants
• 24V input variants
2.9
4.5
11
13.4
22
3.3
5
12
15
24
3.6
V
V
V
V
V
5.5
Example SIP4 Case:
QT8B_0505S3UP
Q = 0.25 Watt; T8 = SMT8; B = Pinning; 05 = 5Vin; 05 = 5Vout;
S = Single Output; 3 = 3kVDC Isolation; U = Unregulated Output
P = Short circuit protection
13.3
16.4
26.5
Isolation specifications
Item
Test condition
Min
Typ
Max
Units
VDC
Note:
1. Operation under minimum load will not damage the converter; However, they
may not meet all specifications.
Isolation voltage
Tested for 1 minute
and 1mA max
3000
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.
Isolation resistance
Viso = 1000VDC
1
GΩ
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.
Page 1 of 4
QT8B_3UP – Rev. 2020-1.3
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
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