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UPS3702 Datasheet(PDF) 7 Page - Unisonic Technologies

Part No. UPS3702
Description  HIGH PERFORMANCE CURRENT MODE POWER SWITCH WITH ZERO CURRENT DETECTION
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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UPS3702 Datasheet(HTML) 7 Page - Unisonic Technologies

   
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UPS3702
Preliminary
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
7 of 9
www.unisonic.com.tw
QW-R119-022.b
FUNCTIONAL DESCRIPTION(Cont.)
Fig.6 OLP case
Fig.7 OVP case
UPS3702
470u
2
1
3
4
7
8
6
5
33n
IC3
VCC
15V
VCC
Drain
VOVP
2.5V
470u
33n
VDD
15V
500Ω
Fig.8 OLP test circuit
Fig.9 OVP test circuit
OTP
OTP will shut down driver when junction temperature TJ>T (THR) for continual a blanking time.
(7) Driver Output Section
The driver-stage drives the gate of the MOSFET and is optimized to minimize EMI and to provide high circuit
efficiency. This is done by reducing the switch on slope when reaching the MOSFET threshold. This is achieved by a
slope control of the rising edge at the driver’s output. The output driver is clamped by an internal 15V Zener diode in
order to protect power MOSFET transistors against undesirable gate over voltage.
(8) Inside power switch MOS transistor
Specific power MOS transistor parameter is as “POWER MOS TRANSISTOR SECTION” in electrical
characteristics table.


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