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AZ7500C Dataheets PDF



Part Number AZ7500C
Manufacturers BCD Semiconductor
Logo BCD Semiconductor
Description Pulse-Width-Modulation Controller
Datasheet AZ7500C DatasheetAZ7500C Datasheet (PDF)

Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description The AZ7500B/C is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ7500B/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 trim.

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Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description The AZ7500B/C is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ7500B/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 AZ7500B/C provides for pushpull or single-ended output operation, which can be selected through the output control. The difference between AZ7500B and AZ7500C is that they have 4.95V and 5V reference voltage respectively. The AZ7500B/C is available in standard packages of DIP-16 and SOIC-16. AZ7500B/C 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 Applications · · · SMPS Back Light Inverter Charger www.DataSheet4U.com SOIC-16 DIP-16 Figure 1. Package Types of AZ7500B/C Apr. 2006 Rev. 1. 2 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 AZ7500B/C Figure 2. Pin Configuration of AZ7500B/C (Top View) Output Function Control Table Signal for Output Control VI = GND VI = VREF Output Function Single-ended or parallel output Normal push-pull operation Functional Block Diagram OUTPUT CTRL RT CT 6 5 13 Oscillator Dead-Time Control Comparator DTC 4 0.12V Error Amplifier 1 1IN + 1IN 1 2 12 Error Amplifier 2 2IN + 2IN 16 15 0.7mA 3 + Reference Regulator 14 7 VCC REF GND + + PWM Comparator D + CK Q2 10 E2 11 Pulse-Steering Flip-Flop Q1 9 E1 C2 8 C1 FEEDBACK Figure 3. Functional Block Diagram of AZ7500B/C Apr. 2006 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Ordering Information AZ7500B/C AZ7500 E1: Lead Free Circuit Type Blank: Tin Lead TR: Tape and Reel Blank: Tube Reference Voltage B: 4.95V C: 5.0V Package M: SOIC-16 P: DIP-16 Package Temperature Range Part Number Tin Lead AZ7500BM Lead Free AZ7500BM-E1 AZ7500BMTR-E1 AZ7500CM-E1 AZ7500CMTR-E1 AZ7500BP-E1 AZ7500CP-E1 Marking ID Tin Lead AZ7500BM AZ7500BM AZ7500CM AZ7500CM AZ7500BP AZ7500CP Lead Free AZ7500BM-E1 AZ7500BM-E1 AZ7500CM-E1 AZ7500CM-E1 AZ7500BP-E1 AZ7500CP-E1 Packing Type Tube Tape & Reel Tube Tape & Reel Tube Tube SOIC-16 -40 to 85oC AZ7500BMTR AZ7500CM AZ7500CMTR AZ7500BP AZ7500CP DIP-16 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2006 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Absolute Maximum Ratings (Note 1) Parameter Supply Voltage (Note 2) Amplifier Input Voltage Collector Output Voltage Collector Output Current Package Thermal Impedance (Note 3) Lead Temperature 1.6mm from case for 10 seconds Storage Temperature Range ESD rating (Machine Model) TSTG Symbol VCC VI VO IO RθJA M Package P Package 260 -65 to 150 200 Value 40 -0.3 to VCC + 0.3 40 250 73 67 oC oC AZ7500B/C Unit V V V mA oC/W V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings"for extended periods may affect device reliability. Note 2: All voltage values are with respect to the network ground terminal. Note 3: Maximum power dissipation is a function of TJ(max), RθJA and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = ( TJ(max) - TA )/RθJA. Operating at the absolute maximum TJ of 150oC can affect reliability. Recommended Operating Conditions Parameter Supply Voltage Collector Output Voltage Collector Output Current (Each Transistor) Amplifier Input Voltage Current Into Feedback Terminal Reference Output Current Timing Capacitor Timing Resistor Oscillator Frequency PWM Input Voltage (Pin 3, 4, 14) Operating Free-Air Temperature TA Symbol VCC VC1, VC2 IC1, IC2 VI IFB IREF CT RT fosc 0.00047 1.8 1.0 0.3 -40 0.001 30 40 0.3 Min 7 Typ 15 30 Max 36 36 200 VCC - 2 0.3 10 10 500 200 5.3 85 Unit V V mA V mA mA µF KΩ KHz V oC Apr. 2006 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics TA = 25oC, VCC=20V, f=1.


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