Green-Mode PWM Controller below 100mW Standby Power
Features
l Current mode PWM control
l Standby power below 100mW solution
l Under voltage lockout (UVLO)
l Non-audible-noise green-mode control
l Programmable switching frequency
l Internal leading-edge blanking
l Internal slope compensation
l Internal soft start
l Gate output voltage clamp
l Jitter and soft driving for reducing EMI
l Over-voltage protection (OVP) on VCC pin
l Over-load protection (OLP)
l Over-current protection (OCP) on CS pin
Description
The GR8830 is a highly-integrated, low startup current, current mode PWM controller with Green-mode function. This function enables the power supply to easily meet even the strictest power conservation requirements. The integrated functions also include the leading-edge blanking of the current sensing, internal slope compensation, cycle-by -cycle peak current limiting, and soft start. OLP, OCP and OVP provide protection performance for fault conditions. For protecting the external power MOSFET from being damaged by supply over voltage, the GR8830 OUT pin voltage is clamped to about 13V.
The GR8830 improves the performance and reduces the cost of power supplies. It is with both DIP-8 and SOT-26 package.
Applications
l Switching AC/DC power adaptor
l Battery charger
l Open-frame SMPS
Typical Application Circuit
