This part is a kind of semiconductor called SG5701TZ.

Function of this product has Low Cost Green-Mode PWM Controller.

Manufacturers : System General

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Product Specification Low Cost Green-Mode PWM Controller for Flyback Converters SG5701 FEATURES Green-Mode PWM Supports the “Blue Angel” Standard Low Start-up Current (10uA) Low Operating Current (2mA) Leading-Edge Blanking Constant Output Power Limit Universal Input Built-in Synchronized Slope Compensation Current Mode Operation Cycle-by-cycle Current Limiting Under Voltage Lockout (UVLO) Programmable PWM Frequency Gate Output Voltage Clamped at 17V Low Cost Few External Components Required Small SOT-26 Package DESCRIPTION This highly-integrated PWM controller provides several special enhancements designed to meet the low standby-power needs of low-power SMPS. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decreas [ ... ]

SG5701TZ PDF Datasheet Download