AZ494AP-E1 Datasheet – Pulse-Width-Modulation Control

Part Number: AZ494AP-E1


Package: SOIC 16, DIP 16 Type

Manufacturer: BCD Semiconductor

Image and Pinouts:

AZ494AP-E1 datasheet



The AZ494AP-E1 is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control.

The AZ494A, AZ494C 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 precision of voltage reference (V REF) is improved up to ± 1% through trimming and this provides a better output voltage regulation. The AZ494A/C provides for push pull or single-ended output operation, which can be selected through the output control.

Block Diagram:

AZ494AP-E1 Datasheet


Pulse width modulation (PWM) is a technique used in electronic circuits to control the amount of power delivered to a load without dissipating excess energy as heat. PWM works by varying the duty cycle of a pulse train, which is a series of pulses that alternate between a high state and a low state.


1. Stable 4.95V/5V Reference Voltage Trimmed to ±1.0% Accuracy
2. Uncommitted Output TR for 200mA Sink or Source Current
3. Single-End or Push-Pull Operation Selected by Output Control
4. Internal Circuitry Prohibits Double Pulse at Either Output
5. Complete PWM Control Circuit with Variable Duty Cycle
6. On-Chip Oscillator with Master or Slave Operation


2. Back Light Inverter
3. Charger


AZ494AP-E1 Datasheet PDF Download
AZ494AP-E1 pdf

Other data sheets are available within the file:  AZ494AM, AZ494AM-E1, AZ494AMTR, AZ494AMTR-E1, AZ494AP