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...