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2022-09-24 23:33:15
PUCC3801 - Current Mode PWM Controller
The PUCC3801 is a current mode pulse width modulation (PWM) controller containing all the control and protection functions needed to implement an off-line, flyback or forward converter with a minimum number of external components.
Features
* Very low start-up supply current 50 mA (typical)
* Low operating supply current 1.2 mA (typ.)
* Accurate, internally trimmed, fixed frequency oscillator (100 kHz). No external timing components required
* Internal slope compensation. No external ramp components required
* Built-in over-voltage and under-voltage detection
* High-speed overcurrent tripping; 170 ns typical
* Overvoltage clamped at supply voltage (VDD)
* Internal voltage divider regulates VDD to 12, 5, no external voltage divider required
* Leading edge blanking current detection signal
* Control the frequency modulated in a narrow band to reduce electromagnetic interference (EMI)
* High output drive capability 150 ns typical rise and fall to 2 nF load time
* Wide bandwidth (10 MHz) external compensation pin and simple interface to optocoupler error amplifier
* Accurate internal bandgap reference.