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2022-09-24 23:33:15
ML4810-High Frequency Power Controller
The ML4810 and ML4811 high-frequency PWM controllers optimize the use of switching power supplies for power supply designs that operate at frequencies up to 1MHz. “The ML4810/11 contains a unique overload protection circuit which helps limit stress on the output device, perform a soft-start reset reliably. These controllers operate in voltage or current mode and are designed to provide input voltage feedforward. A 1.1V Threshold current limit comparator provides a cycle-by-cycle current limit. The integrator circuit "counts" to double the 1.1V limit. The cycle-by-cycle current at the beginning of the soft-start cycle activates the limit multiple times. A delay function for reset is provided on the ML4811.
Features
* Integrated soft-start reset
* High current (2A peak) dual totem pole outputs
*Actually runs to 1MHz (FOSC)
*5.1V±2% Adjusted Bandgap Reference
* Undervoltage lockout with hysteresis at 7V
*Soft start reset delay (ML4811)
*Oscillator synchronization function (ML4811)
* Soft-start latch to ensure adequate soft-start cycle
* Output pull low under voltage lockout
* Precisely controlled oscillator ramp discharge current
*Precise control of all chronocurrent "slave" RTs...