On-Bright OB339F
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. The LED current (CC control) can be adjusted externally by the resistor Rs at SOURCE pin.| Part No. | OB339F |
|---|---|
| Datasheet | OB339F Download |
| Manufacturer |  On-Bright |
| Description | High Precision Off-line Primary-Side PWM Power Switch |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. OB339F offers comprehensive 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 compensation
● 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.
