OB339F Datasheet | On-Bright

DESCRIPTION OB339F is a primary side regulation off-line LED lighting controller which can achieve accurate LED current. It significantly simplifies LED lighting system design by eliminating the secondary side feedback circuitry. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. The LED current (CC control) can be adjusted externally by the resistor Rs at SOURCE pin. OB339F offers prehensive protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD OVP, VDD clamp and UVLO. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique. OB339F is offered in DIP8 package. FEATURES - High Precise Constant Current Regulation at Universal AC input - Primary-side Sensing and Regulation Without TL431 and Opto-coupler - Programmable CC Regulation - Adjustable Constant Current and Output Power Setting - Built-in Secondary Constant Current Control with Primary Side Feedback - Built-in Adaptive Current Peak Regulation - Built-in Primary winding inductance pensation - Power on Soft-start - Built-in Leading Edge Blanking (LEB) - Cycle-by-Cycle Current Limiting - VDD Under Voltage Lockout with Hysteresis (UVLO) - VDD OVP - VDD Clamp APPLICATIONS Low Power AC/DC offline SMPS for - LED applications Fig.1. Typical CC/CV Curve . TYPICAL APPLICATION ©On-Bright Electronics Confidential -1- Datasheet OB_DOC_DS_339FA0 High Precision Off-line Primary-Side PWM Power Switch GENERAL INFORMATION Pin Configuration The pin map is shown as below for DIP8. VDD 1 DRAIN DRAIN SOURCE Ordering Information Part...