AZ494AM-E1

Product Brief PULSE-WIDTH-MODULATION CONTROL CIRCUITS 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 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 (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. AZ494A/C Parametric Table AZ494A Reference Voltage (V) AZ494C Reference Voltage Tolerance Frequency Change with Temperature (Max) Open Loop Voltage Gain (db) Unity-Gain Bandwidth (KHz) Output Saturation Voltage (Common Emitter) (V) Rise Time (ns) 5 1% 1% 95 650 1.1 100 25 7 to 36 DIP-16 Package SOIC-16 4.95 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 Operation Fall Time (ns) Supply Voltage (V) Benefits · · Higher Power Glitch Rejection Very competitive price Applications · · · SMPS Back Light Inverter Charger Additional Available Materials · · · · · · Samples Data Sheet Reliability Report ESD Report Application Notes Demo Board Apr. 2006 BCD Semiconductor Manufacturing Limited Product Brief PULSE-WIDTH-MODULATION CONTROL CIRCUITS Pin Configuration 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 AZ494A/C Ordering Information Package Temperature Range Part Number Tin Lead AZ494AM SOIC-16 -40 to 85oC AZ494AMTR AZ494CM AZ494CMTR AZ494AP AZ494CP Lead Free AZ494AM-E1 AZ494AMTR-E1 AZ494CM-E1 AZ494CMTR-E1 AZ494AP-E1 AZ494CP-E1 Tin Lead AZ494AM AZ494AM AZ494CM AZ494CM AZ494AP AZ494CP Marking ID Lead Free AZ494AM-E1 AZ494AM-E1 AZ494CM-E1 AZ494CM-E1 AZ494AP-E1 AZ494CP-E1 Packing Type Tube Tape & Reel Tube Tape & Reel Tube Tube DIP-16 Detailed information please refer to the relevant datasheet. USA 3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411, U.S.A Tel : +1-408-988 6388 Fax : +1-408-988 6386 Taiwan 4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel : 886-2-2656-2808 Fax : 886-2-2656-2806 Shanghai 8F, B Zone, 900 Yi Shan Road, Shanghai 200233, China Tel : 86-21-6495 9539 Fax : 86-21-6485 9673 Shenzhen Room 27B, Tower C, No. 2070, Shennanzhong Road, Shenzhen 518031, China Tel : 86-755-8368 3987 Fax : 86-755-8368 3166 Apr. 2006 BCD Semiconductor Manufacturing Limited