GR8837T Green-Mode PWM Controller with Hiccup Protection Features Description Current Mode Control The GR8837T 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 Auto recovery Internal Slope Compensation function by injecting a high over 3.5V to provide Internal Soft Start OVP Auto recovery and low below 1V to provide Gate Output Voltage Clamp OTP Auto recovery protection. These functions Jitter and Soft Driving for Reducing EMI enable the power supply to easily meet even the External OVP Auto Recovery Mode strictest power requirements. External OTP Auto Recovery Mode The GR8837T 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 GR8837T Package Code RoHS Code G: Green (Halogen Free) Device J: DIP-8 L: PB Free Device C: SOT-26 DIP-8 SOT-26 GR8837T 37T 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. Nanjing Greenchip Semiconductor Co., Ltd. Inc. (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. 2018.09 Ver.1.0 Copyright Nanjing Greenchip Semiconductor Co., Ltd. Inc. (Grenergy OPTO, Inc.) www.grenergy-ic.com 1 GR8837T 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 will enter auto recovery mode which a high over 3.5V for OVP auto 3 RTL recovery and a low below 1V for OTP auto recovery 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 2018.09 Ver.1.0 Copyright Nanjing Greenchip Semiconductor Co., Ltd. Inc. (Grenergy OPTO, Inc.) www.grenergy-ic.com 2