BCD Semiconductor Manufacturing Limited AZ494A
The AZ494A/C is a voltage mode pulse width modula- · Stable 4.95V/5V Reference Voltage Trimmed to tion switching regulator control circuit designed pri- ±1.0% Accuracy marily for power supply control. The precision of voltage reference (VREF) is improved up to ± · Output Complete PWM Control Circuit with Variable 1% through trimming and this provides a better output Duty Cycle voltage regulation. The AZ494A/C provides for push- · On-Chip Oscillator with Master or Slave Opera- pull or single-ended output operation, which can be tion selected through the output control.| Part No. | AZ494A |
|---|---|
| Datasheet | AZ494A Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | PULSE-WIDTH-MODULATION CONTROLLER |
| Buy | Stock & Price |
GENERAL DESCRIPTION
FEATURES
AZ494A/C● Uncommitted Output TR for 200mA Sink or Source Current The AZ494A/C consists of a reference voltage circuit,
● Single-End or Push-Pull Operation Selected by two error amplifiers, an on-chip adjustable oscillator, a Output Control dead-time control (DTC) comparator, a pulse-steering
● Internal Circuitry Prohibits Double Pulse at Either control flip-flop, and an output control circuit. The difference between AZ494A and AZ494C is that they have 4.95V and 5V reference voltage respectively. The AZ494A/C is available in standard packages of DIP-16 and SOIC-16.
APPLICATIONS
● SMPS● Back Light Inverter
● Charger SOIC-16 DIP-16 Sep. 2009 Rev. 1. 4 Figure 1. Package Types of AZ494A/C BCD Semiconductor Manufacturing Limited 1 PULSE-WIDTH-MODULATION CONTROL CIRCUITS Pin Configuration M/P Package (SOIC-16/DIP-16) 1IN + 1 1IN - 2 FEEDBACK 3 DTC 4 CT 5 RT 6 GND 7 C1 8 16 2IN + 15 2IN - 14 REF 13 OUTPUT CTRL 12 VCC 11 C2 10 E2 9 E1 Figure 2. Pin Configuration o...
