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RS2022P

更新时间： 2022-05-07 04:53:46
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描述
Low Power OFF-Line SMPS Primary Switcher

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RS2022  
Low Power OFF-Line SMPS Primary Switcher  
The RS2022 combines a dedicated current mode PWM controller with a high voltage Power MOSFET on the same  
silicon chip.  
Typical applications cover off line power supplies for battery charger adapters, standby power supplies for TV or  
monitors, auxiliary supplies for motor control, etc. The internal control circuit offers the following benefits:  
◎ Large input voltage range on the VCC pin accommodates changes in auxiliary supply voltage. This feature is  
well adapted to battery charger adapter configurations.  
◎ Automatic burst mode in low load condition.  
◎ Over voltage protection in HICCUP mode.  
Features  
◎ 85V to 265V wide range AC voltage input  
◎ A 700V MOSFET on the same silicon chip  
◎ Auto start up with high voltage current source  
◎ PWM with current mode control  
◎ 9V to 38V wide range VCC voltage  
◎ Fixed 60KHz switching frequency  
◎ Automatic skip cycle mode in low load condition  
◎ Over temperature, over current and over voltage protection  
◎ Auxiliary under voltage lockout with hysteresis  
Applications  
◎ Power AC/DC Adapters for Chargers  
◎ DVD/VCD power supplies  
◎ Electromagnetic Oven power supplies  
◎ Air Conditioner power supplies  
◎ STB power supplies  
◎ AC/DC LED Driver Applications  
Pin Configurations  
TYPE  
DIP-8L  
20W  
European (195-265 Vac)  
US (85-265 Vac)  
12W  
Pin Number Pin Name  
Function Description  
1, 2  
3
GND  
COMP  
Sense FET source terminal on primary side and internal control ground.  
Feedback input defines the peak drain MOSFET current.  
Positive supply voltage input. Although connected to an auxiliary transformer winding,  
current is supplied from SW via an internal switch during startup (see Internal Block  
Diagram section). It is not until VCC reaches them UVLO upper threshold (14.5V)  
that the internal start-up switch opens and device power is supplied via the auxiliary  
transformer winding.  
4
VCC  
SW  
The SW pin is designed to connect directly to the primary lead of the transformer and  
is capable of switching a maximum of 700V.  
5, 6, 7, 8  
DS-RS2022-02 November, 2010  
www.Orister.com  
1234567

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