Description
G1135P is a high performance offline PWM
Power switch for low power AC/DC charger and
adaptor applications up to 12W.It operates in
primary-side regulation. Consequently,
opto-coupler and TL431 could be eliminated.
Proprietary Constant Voltage (CV) and Constant
Current (CC) control is integrated as shown In
the Fig.1. In CC control,the current and output
power setting can be adjusted externally by the
sense resistor RS at CS pin. In CV control,
multi-mode operations are utilized to achieve
high performance and high efficiency.
In addition, good load regulation is achieved by
the built-in cable drop compensation. Device
operates in PFM in CC mode as well at large load
condition and it operates in PWM with frequency
reduction at light/medium load.
G1135P offers power on soft start control and
protection coverage with auto-recovery features
including Cycle-by-Cycle current limiting, VDD
OVP, VDD clamp and UVLO. Excellent EMI
performance is achieved with frequency jitter
technique.

Features
◆ 5% CV and CC Regulation at Universal
AC input
◆ Primary-side Regulation Without TL431
and Opto-coupler
◆ Built-in High-Voltage Power MOS
◆ Programmable CV and CC Regulation
◆ Adjustable Constant Current and Output
Power Setting
◆ Built-in Secondary Constant Current
Control with Primary Side Feedback
◆ Built-in Primary winding inductance
compensation
◆ Programmable cable drop compensation
◆ Built-in Leading Edge Blanking (LEB)
◆ Power on Soft-start
◆ Built-in adaptive current peak regulation
◆ Cycle-by-Cycle Current Limiting
◆ VDD Under Voltage Lockout with
Hysteresis (UVLO)
◆ VDD OVP and VDD Clamp
◆ Pb-free DIP-7

Applications
◆ Cell Phone Charger
◆ Digital Cameras Charger
◆ LED Driver
◆ Small Power Adaptor
◆ Auxiliary Power for PC, TV etc.
◆ Linear Regulator/RCC Replacement