GR8876A
Green-Mode PWM Controller with Integrated Protections
Applications
Features
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Open-frame SMPS
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High-voltage (500V) startup circuit
Switching AC/DC adapter
Current mode PWM
Very low startup current (<20uA)
Under-voltage lockout (UVLO)
Non-audible-noise green-mode control
Programmable switching frequency
Cycle-by-cycle peak current limiting
Internal leading-edge blanking
Internal slope compensation
Internal 4ms soft start (Fs = 65KHz)
Gate output voltage clamp
Description
The GR8876A is a highly-integrated, low startup
current, current mode PWM controller with
green-mode function and high-voltage start up
circuit. A high-voltage current source supplies the
start up current and the traditional start-up resistor
can be saved in order to reduce the power
dissipation due to start-up resistor. The controller
also includes the leading-edge blanking of the
current sensing, internal slope compensation and
cycle-by-cycle peak current limiting. It is also
integrated soft driving for reducing EMI, gate output
voltage clamp function for protecting power
MOSFET. GR8876A provides several protections
such as OLP, OVP, and OCP for fault conditions.
The GR8876A improves the performance and
reduces the cost of power supplies. It is available in
both 8-pin SOP,7-pin SOP and 8-pin DIP package.
Soft driving for reducing EMI
Over-voltage protection (OVP) on Vcc pin
Over-load protection (OLP)
500mA driving capability
Ordering and Marking Information
DIP-8/SOP-8/SOP-7
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.
2010.10 Ver. 1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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