RS2022 Orister Corporation, RS2022 Datasheet

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RS2022

Manufacturer Part Number
RS2022
Description
Low Power Off-line Smps Primary Switcher
Manufacturer
Orister Corporation
Datasheet
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
◎ 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
Pin Number
DS-RS2022-01
5, 6, 7, 8
well adapted to battery charger adapter configurations.
1, 2
3
4
Pin Name
July, 2008
COMP
GND
VCC
SW
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.
The SW pin is designed to connect directly to the primary lead of the transformer and
is capable of switching a maximum of 700V.
European (195-265 Vac)
Function Description
US (85-265 Vac)
TYPE
SOP-8L
12W
7W
www.Orister.com
Page No.: 1/7
DIP-8L
20W
12W

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RS2022 Summary of contents

Page 1

... 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: ◎ ...

Page 2

... Block Diagram Typical Application Circuit DS-RS2022-01 July, 2008 Page No.: 2/7 www.Orister.com ...

Page 3

... Startup Charging Current CH Start Up Charging Current in Thermal I CHOFF Shutdown Operating Supply Current I OP0 (Control Part Only) Switching Operating Supply Current I OP1 (Control Part Only) Not Switching DS-RS2022-01 July, 2008 (Ta=25°C, unless otherwise specified) Parameter =25-125°C) J (Power) Conditions I =1mA =500V ...

Page 4

... In order to prevent this situation, an over voltage protection (OVP) circuit is employed. If VCC exceeds 42V, OVP circuit is activated resulting in termination of the switching operation. In order to avoid undesired activation of OVP during normal operation, VCC should be properly designed to be below 42V. DS-RS2022-01 July, 2008 Fig 1 Startup circuit Page No ...

Page 5

... SOP-8L Dimension B 8-Lead SOP-8L Plastic Surface Mounted Package Package Code: S DIP-8 Dimension 8-Lead DIP-8 Plastic Package Package Code: P Ordering Information PART NUMBER RS2022S RS2022P DS-RS2022-01 July, 2008 Pin1 Index Part A L Part ...

Page 6

... Peak Temperature ( Time within actual Peak Temperature ( Ramp-down Rate o Time Peak Temperature 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. DS-RS2022-01 July, 2008 o o C~35 C Humidity=65%±15% Ramp- Preheat Ramp-down Peak Time Sn-Pb Eutectic Assembly o ) < ...

Page 7

... Orister Corporation reserves the right to make changes to its products without notice. • Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems. • Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. DS-RS2022-01 July, 2008 Page No.: 7/7 www.Orister.com ...

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