NCP1252 Description
This pin directly connects to an optocoupler collector. This pin monitors the input voltage image to offer a Brown−out protection. Monitors the primary current and allows the selection of the ramp pensation amplitude.
NCP1252 Key Features
- Peak Current Mode Control
- Adjustable Switching Frequency up to 500 kHz
- Jittering Frequency 5% of the Switching Frequency
- Latched Primary Over Current Protection with 10 ms Fixed Delay
- Delay Extended to 150 ms in E Version
- Delayed Operation Upon Start-up via an Internal Fixed Timer
- Adjustable Soft-start Timer
- Auto-recovery Brown-Out Detection
- UC384X-like UVLO Thresholds
- Vcc Range from 9 V to 28 V with Auto-recovery UVLO