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AZ494A Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AZ494A Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 2 page  Description The AZ494A/C is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ494A/C consists of a refer- ence voltage circuit, two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) compara- tor, a pulse-steering control flip-flop, and an output con- trol circuit. The precision of voltage reference (VREF) is improved up to ± 1% through trimming and this provides a better output voltage regulation. The AZ494A/C pro- vides for push-pull or single-ended output operation, which can be selected through the output control. 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 Out- put 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 · SMPS · Back Light Inverter · Charger Apr. 2006 BCD Semiconductor Manufacturing Limited Product Brief PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ494A/C Parametric Table Reference Voltage (V) AZ494A 4.95 AZ494C 5 Reference Voltage Tolerance 1% Frequency Change with Temperature (Max) 1% Open Loop Voltage Gain (db) 95 Unity-Gain Bandwidth (KHz) 650 Output Saturation Voltage (Common Emitter) (V) 1.1 Rise Time (ns) 100 Fall Time (ns) 25 Supply Voltage (V) 7 to 36 Package DIP-16 SOIC-16 Benefits · Higher Power Glitch Rejection · Very competitive price Additional Available Materials · Samples · Data Sheet · Reliability Report · ESD Report · Application Notes · Demo Board |
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