Preliminary GR8837R Green-Mode PWM Controller with Hiccup Protection Features Description Current Mode Control The GR8837R is a highly-integrated, low startup Standby Power below 100mW current, current mode PWM controller with Under-Voltage Lockout (UVLO) green-mode function. The integrated functions also Non-Audible-Noise Green-Mode Control include the leading-edge blanking of the current 65KHz Switching Frequency sensing, internal slope compensation, soft start Internal Leading-Edge Blanking OLP, and OCP. Besides, The RTL pin latch function Internal Slope Compensation by injecting a high over 3.5V to provide OVP latch Internal Soft Start off and low below 1V to provide OTP latch off Gate Output Voltage Clamp protection. These functions enable the power supply Jitter and Soft Driving for Reducing EMI to easily meet even the strictest power External OVP Latch Mode requirements. External OTP Latch Mode The GR8837R improves the performance and Over-Load Protection (OLP)- -Auto Recovery reduces the cost of power supplies. It is with 8-pin Mode DIP and 6-pin SOT-26 package. Vcc OVP Protection- Auto Recovery Mode 300mA Driving Capability . Application Battery Charger Open Frame SMPS Switching AC/DC Adapter Ordering and Marking Information GR8837R Package Code RoHS Code G: Green (Halogen Free) Device J: DIP-8 L: PB Free Device C: SOT-26 DIP-8 SOT-26 GR8837R 37R X X Code 1 Code 2 X X XXX X X X Serial No. Code 1 Serial No. Code 2 Code 1 8 9 A B G H I J Year 2008 2009 2010 2011 2016 2017 2018 2019 Code 2 1 2 3 4 9 A B C Month Jan. Feb. Mar. Apr. Sep. Oct. Nov. Dec. Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. 2011.12 Ver. B Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 1 Preliminary GR8837R Pin Configuration GND OUT 1 6 COMP VCC 5 2 CS RTL 3 4 Pin Description Pin No. Name Function 1 GND Ground pin 2 COMP Voltage feedback pin, by connecting a photo-coupler to control the duty cycle Resistor trigger latch off which a high over 3.5V for OVP latch off and a low below 3 RTL 1V for OTP latch 4 CS Current sense pin, connect to sense the MOSFET current 5 VCC Power supply pin 6 OUT The output driver for driving the external MOSFET Absolute Maximum Ratings Supply voltage VCC --------------------------------------------------------------------------------------------------------- 30V COMP, RTL, CS ---------------------------------------------------------------------------------------------------- -0.3 ~ 7V OUT ----------------------------------------------------------------------------------------------------------- -0.3 ~ VCC + 0.3V Junction temperature ------------------------------------------------------------------------------------------------------- 150 Operating ambient temperature ------------------------------------------------------------------------------ -20 ~ 85 Storage temperature range ---------------------------------------------------------------------------------- -65 ~ 150 SOT-26 package thermal resistance (junction to ambient) -------------------------------------------------- 250/W Power dissipation (SOT-26, at ambient temperature = 85 ) ------------------------------------------------ 250mW Power dissipation (DIP-8, at ambient temperature = 85 ) --------------------------------------------------- 650mW Lead temperature (All Pb free packages, soldering, 10 sec) -------------------------------------------------- 260 ESD voltage protection, human body model -------------------------------------------------------------------------- 2KV ESD voltage protection, machine model ------------------------------------------------------------------------------ 200V 2011.12 Ver. B Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 2