BCD Semiconductor Manufacturing Limited AZ494D
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.| Part No. | AZ494D |
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| Datasheet | AZ494D Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | PULSE-WIDTH-MODULATION CONTROLLER |
| Buy | Stock & Price |
GENERAL DESCRIPTION
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 this provides a better output voltage regulation. The AZ494B/D is available in standard packages of DIP-16 and SOIC-16. AZ494B/DFEATURES
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● Stable 4.95V for AZ494B or 5V for AZ494D Reference Voltage Trimmed to ±1.5% Accuracy Uncommitted Output TR for 200mA Sink or Source Current Single-End or Push-Pull Operation Selected by Output Control Internal Circuitry Prohibits Double Pulse at Either Output Complete PWM Control Circuit with Variable Duty Cycle On-Chip Oscillator with Master or Slave Operation
APPLICATIONS
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● SMPS Back Light Inverter Charger SOIC-16 DIP-16 Figure 1. Package Types of AZ494B/D Jun. 2005 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Pin Configuration M / P Package (SOIC-16 / DIP-16) 1IN + 1IN FEEDBACK DTC CT RT GND C1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 2IN + 2IN REF OUTPUT CTRL VCC C2 E2 E1 AZ494B/D Figure 2.
