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AZ494AP Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AZ494AP Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 13 page  PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ494A/C Data Sheet 1 Sep. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited General Description The AZ494A/C is a voltage mode pulse width modula- tion switching regulator control circuit designed pri- marily for power supply control. The AZ494A/C 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 pre- cision of voltage reference (VREF) 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. 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. Features · Stable 4.95V/5V Reference Voltage Trimmed to ±1.0% 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 Opera- tion Applications · SMPS · Back Light Inverter · Charger Figure 1. Package Types of AZ494A/C SOIC-16 DIP-16 |
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Similar Description - AZ494AP |
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