JW1551 - JoulWatt

JW1551 Active Clamp Flyback Controller

JW®1551 is an active clamp flyback controller for offline flyback converter applications. The JW1551 can be adopted to reduce switching loss and provide high efficiency in whole load range. JW1551 provide two control outputs, the main power switch control and the active clamp switch control. JW1551 also has X-cap discharge function to discharge the X-cap whe.

Features

 Boundary Mode Operation at Heavy Load
 DCM Operation at Light Load
 Burst Mode Control
 Built-in Soft-start Function
 X-cap Discharge Function
 Include a Boost Converter, Allow Vin Range 2.5-38V
 Maximum Frequency Setting with a Single External Resistor
 Adjustable Line Compensation
 High Switching Frequency up to 1.5MHz
 Reliable Fault Protections: VIN OVP/UVP, VS OVP/UVP, SCP, Brown-In/Out, OTP, CS Open and Short Protection
 QFN4X4-20 Package APPLICATIONS
 Adaptor TYPICAL APPLICATION T1 SR C ontr olle r VBUS OTP RT RFM EN COMP GAC HV GON JW1551 VDD VS CS VIN BST VCC G.