NCP1032 Datasheet | onsemi

Low Power PWM Controller with On-Chip Power Switch The NCP1032 is a miniature high- voltage monolithic switching converter with on- chip power switch and startup circuits. It incorporates in a single IC all the active power control logic and protection circuitry required to implement, with minimal external ponents several switching regulator applications, such as a secondary side bias supply or a low power DC- DC converter. This converter is ideally suited for 24 V and 48 V tele and medical isolated power supply applications. The NCP1032 can be configured in any single- ended topology such as forward or flyback converter. The NCP1032 is targeted for applications requiring up to 3 W. The internal error amplifier allows the NCP1032 to be easily configured for secondary or primary side regulation operation in isolated and non- isolated configurations. The fixed frequency oscillator is optimized for operation up to 1 MHz and is capable of external frequency synchronization, providing additional design flexibility. In addition, the NCP1032 incorporates undervoltage and overvoltage line detectors, programmable cycle- by- cycle current limit, internal soft- start, and thermal shutdown to protect the controller under fault conditions. Features - On Chip High 200 V Power Switch Circuit and Startup Circuit - Internal Startup Regulator with Auxiliary Winding Override - Programmable Oscillator Frequency Operation up to 1 MHz - External Frequency Synchronization Capability - Frequency Fold- down Under Fault Conditions - Trimmed ± 2% Internal Reference - Programmable Cycle- by- Cycle Current Limit - Internal Soft- Start - Active Leading Edge Blanking Circuit - Line Under and Over Voltage Protection - Over Temperature Protection - These are Pb- Free Devices Typical Applications - POE (Power Over Ethernet)/PD. Refer to Application Note AND8247 - Secondary Side Bias Supply for Isolated DC- DC Converters - Stand Alone Low Power DC- DC Converter - Low Power Bias Supply - Low Power...