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| Product Brief PULSE-WIDTH-MODULATION CONTROL CIRCUITS Description 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 precision of voltage reference (VREF) is improved up to 1.5% through trimming and this provides a better output voltage regulation. The AZ494B/D provides for push-pull or single-ended output operation, which can be selected through the output control. AZ494B/D Parametric Table AZ494B Reference Voltage (V) AZ494D 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 1.5% 1% 95 800 1.1 100 25 7 to 36 DIP-16 Package SOIC-16 4.95 Features * * * * * * Stable 4.95V/5V 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 Fall Time (ns) Supply Voltage (V) Benefits * Very competitive price Applications * * * SMPS Back Light Inverter Charger Additional Available Materials * * * * * * Samples Data Sheet Reliability Report ESD Report Application Notes Demo Board Jun. 2005 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 AZ494B/D Ordering Information Package Temperature Range Part Number Tin Lead AZ494BM SOIC-16 -40 to 85oC AZ494BMTR AZ494DM AZ494DMTR AZ494BP AZ494DP Lead Free AZ494BM-E1 AZ494BMTR-E1 AZ494DM-E1 AZ494DMTR-E1 AZ494BP-E1 AZ494DP-E1 Tin Lead AZ494BM AZ494BM AZ494DM AZ494DM AZ494BP AZ494DP Marking ID Lead Free AZ494BM-E1 AZ494BM-E1 AZ494DM-E1 AZ494DM-E1 AZ494BP-E1 AZ494DP-E1 Packing Type Tube Tape & Reel Tube Tape & Reel Tube Tube DIP-16 Detailed information please refer to the relevant datasheet. Sales Office: 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 Jun. 2005 BCD Semiconductor Manufacturing Limited |
Price & Availability of AZ494BP
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