Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
The AZ494B/D is a
voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control.
The AZ494B/D consists of a reference
voltage circuit, two error
amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, and an output control circuit.
The AZ494B/D is capable for push-pull or single-ended output operation, which can be selected through the output control.
AZ494B has 4.
95V and AZ494D has 5V reference
voltage respectively.
The precision of
voltage reference (VREF) is improved up to ± 1.
5% through trimming and th...