Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description Features The AZ496 is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. · The AZ496 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 AZ496 provides for push-pull or single-ended output operation, which can be selected through the output control. The PWM IC is specially designed for half bridge converter and can simplify the drive circuit. The AZ496 is available in SOIC-16 and DIP-16 packages. · · · · · AZ496 Stable 4.95V Reference Voltage Trimmed to ±1.0% Accuracy Uncommitted Output TR for 100mA 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 SOIC-16 DIP-16 Figure 1. Package Types of AZ496 BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 1 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Pin Configuration M Package (SOIC-16) P Package (DIP-16) 1IN + 1 16 2IN + 1IN - 2 15 2IN - FEEDBACK 3 14 REF DTC 4 13 OUTPUT CTRL CT 5 12 VCC RT 6 11 C2 E2 GND 7 10 E2 E1 C1 8 9 E1 1IN + 1 16 2IN + 1IN - 2 15 2IN - FEEDBACK 3 14 REF DTC 4 13 OUTPUT CTRL CT 5 12 VCC RT 6 11 C2 GND 7 10 C1 8 9 Figure 2. Pin Configuration of AZ496 (Top View) Output Function Control Table Signal for Output Control Output Function VI = GND Single-ended or parallel output VI = VREF Normal push-pull operation Functional Block Diagram OUTPUT CTRL RT CT 6 5 Pulse-Steering Flip-Flop 9 D 4 + 11 CK 0.12V Error Amplifier 1 1IN + 1IN - 1 + 2IN - FEEDBACK E1 C2 Q2 + 10 PWM Comparator E2 2 12 2IN + C1 Q1 Dead-Time Control Comparator DTC 8 13 Oscillator 16 Error Amplifier 2 + 14 Reference Regulator 15 0.7mA 7 VCC REF GND 3 Figure 3. Functional Block Diagram of AZ496 BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 2 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Ordering Information AZ496 G1: Green Circuit Type TR: Tape and Reel Blank: Tube Package M: SOIC-16 P: DIP-16 Package Temperature Range SOIC-16 -40 to DIP-16 85o C Part Number Marking ID Packing Type AZ496M-G1 AZ496M-G1 Tube AZ496MTR-G1 AZ496M-G1 Tape & Reel AZ496P-G1 AZ496P-G1 Tube BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green. BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 3 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Supply Voltage (Note 2) VCC 40 V Amplifier Input Voltage VI -0.3 to VCC + 0.3 V Collector Output Voltage VO 40 V Collector Output Current IO 150 mA Package Thermal Impedance (Note 3) θJA Lead Temperature 1.6mm from case for 10 seconds Storage Temperature Range SOIC-16 73 DIP-16 67 o C/W TLEAD 260 TSTG -65 to 150 oC 200 V ESD rating (Machine Model) o C 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), θJA and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = ( TJ(max) - TA )/θJA. Operating at the absolute maximum TJ of 150oC can affect reliability. Recommended Operating Conditions Parameter Supply Voltage Symbol Min Typ Max Unit VCC 7 15 36 V 30 36 V 100 mA VCC - 2 V Collector Output Voltage VC1, VC2 Collector Output Current (Each Transistor) IC1, IC2 Amplifier Input Voltage VI Current Into Feedback Terminal IFB 0.3 mA Reference Output Current IREF 10 mA 0.3 Timing Capacitor CT 0.00047 0.001 10 µF Timing Resistor RT 1.8 30 500 KΩ Oscillator Frequency fosc 1.0 40 100 KHz PWM Input Voltage (Pin 3, 4, 14) Operating Free-Air Temperature 0.3 TA -40 5.3 V 85 oC BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 4 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Electrical Characteristics TA=25oC, VCC=20V, f=10KHz unless otherwise noted. Parameter Symbol Conditions Min Typ Max Unit 4.90 4.95 5.0 V 4.85 4.95 5.05 V Reference Section IREF=1mA Output Reference Voltage VREF Line Regulation RLINE VCC=7V to 36V 2 25 mV Load Regulation RLOAD IREF=1mA to 10mA 1 15 mV 35 50 mA Short-Circuit Output Current ISC 85oC IREF=1mA, TA= -40 to VREF=0V 10 Oscillator Section CT=0.001µF, RT=30KΩ, Oscillator Frequency fOSC CT=0.01µF, RT=12KΩ 9.2 CT=0.01µF, RT=12KΩ, TA= -40 to 85oC Frequency Change with Temperature ∆f/∆T 40 10 9.0 10.8 kHz 12 CT=0.01µF, RT=12KΩ, TA=-40 to 85oC 1 % -10 µA Dead-Time Control Section Input Bias Current Maximum Duty Cycle Input Threshold Voltage IBIAS D(MAX) VITH VCC=15V, V4=0 to 5.25V VCC=15V, V4=0V, Pin 13=VREF -2 45 Zero Duty Cycle Maximum Duty Cycle % 3 3.3 0 V Error-Amplifier Section Input Offset Voltage VIO V3=2.5V 2 10 mV Input Offset Current IIO V3=2.5V 25 250 nA Input Bias Current IBIAS V3=2.5V 0.2 1 µA Common-Mode Input Voltage Range VCM VCC=7V to 36V -0.3 VCC-2 V Open-loop Voltage Gain GVO VO=0.5V to 3.5V 70 Unity-Gain Bandwidth BW Common-Mode Rejection Ratio CMRR Output Sink Current (Feedback) ISINK Output Source Current (Feedback) ISOURCE VID= -15mV to -5V, V3= 0.7V VID=15mV to 5V V3=3.5V 95 dB 650 kHz 65 80 dB -0.3 -0.7 mA 2 mA BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 5 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Unit 4 4.5 V PWM Comparator Section Input Threshold Voltage VITH Zero duty cycle Input Sink Current ISINK V3 = 0.7V -0.3 -0.7 mA Output Section Common Emitter VCE (SAT) VE = 0V, IC =200mA 1.1 1.3 Emitter Follower VCC (SAT) VCC = 15V, IE = -200mA 1.5 2.5 Collector Off-State Current IC (OFF) VCE = 36V, VCC=36V 2 100 µA Emitter Off-State Current IE(OFF) VCC = VC = 36V, VE = 0 -100 µA ICC Pin 6 = VREF, VCC=15V 6 10 mA Output Saturation Voltage V Total Device Supply Current Output Switching Characteristics Rise Time tR Common Emitter Common Collector 120 200 ns Fall Time tF Common Emitter Common Collector 50 100 ns BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 6 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Parametre Measurement information VCC = 20V 12 VCC 4 Test Inputs 3 12KΩ 6 5 DTC C1 FEEDBACK E1 RT C2 150Ω 4W 150Ω 4W Output 1 9 11 Output 2 10 E2 CT 0.01uF 1 8 1IN+ 2 1IN- 16 2IN+ 15 2IN- 13 OUTPUT CTRL GND 50KΩ 14 REF 7 Test Circuit Voltage at C1 VCC Voltage at C2 VCC 0V 0V Voltage at CT Threshold Voltage DTC 0V Threshold Voltage FEEDBACK 0.7V Duty Cycle 0% 0% MAX Voltage Waveforms Figure 4. Operational Test Circuit and Waveforms BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 7 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Parametre Measurement information (Continued) Amplifier Under Test + VI FEEDBACK + Vref Other Amplifier Figure 5. Error Amplifier Characteristics 20V 200Ω 4W Each Output Circuit tf Output tr 90% CL = 15pF (See Note A) 90% 10% 10% Note A: CL includes probe and jig capacitance. Figure 6. Common-Emitter Configuration 20V Each Output Circuit 90% 90% Output CL = 15pF (See Note A) 10% 10% 200Ω 4W tr tf Note A: CL includes probe and jig capacitance. Figure 7. Emitter-Follower Configuration BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 8 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Typical Performance Characteristics VCC=20V f - Oscillator Frequency (Hz) 100k O TA=25 C 0.001µF 10k 0.01µF 0.1µF 1k 1k 10k 100k 1M RT - Timing Resistance (Ω) Figure 8. Oscillator Frequency vs. RT and CT 100 VCC=20V ∆VO=3V 90 Voltage Gain (dB) 80 o TA=25 C 70 60 50 40 30 20 10 0 1 10 100 1k 10k 100k 1M Frequency (Hz) Figure 9. Error Amplifier Small-Signal Voltage Gain vs. Frequency BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 9 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Typical Application VIN VCC 12 6 5 2IN - 14 REF 2 1IN - 3 1 C1 8 E1 9 E2 10 C2 11 CT 13 OUTPUT CTRL 15 VOUT VCC RT FEEDBACK DTC 4 1IN+ 2IN+ GND 16 7 Figure 10. Half Bridge Converter BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 10 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Mechanical Dimensions SOIC-16 1.350(0.053) 1.750(0.069) 7° 0.330(0.013) 0.510(0.020) Unit: mm(inch) 1.250(0.049) 1.650(0.065) 7° B A 20:1 0.250(0.010) 0.400(0.016) 9.800(0.386) 10.200(0.402) 0° 8° R0.200(0.008) R0.200(0.008) 0.050(0.002) 0.250(0.010) 0.170(0.007) 0.250(0.010) 5.800(0.228) 6.240(0.246) 3.800(0.150) 4.040(0.159) 9 .5 ° 8° 8° 0.200(0.008) Sφ1.000(0.039) Depth 0.200(0.008) 8° A 0.400(0.016)×45° C-C 50:1 B 20:1 C 3° 7° 0.200(0.008) 0.250(0.010) 1.000(0.039) 1.270(0.050) BSC 1.270(0.050) C Note: Eject hole, oriented hole and mold mark is optional. BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 11 Preliminary Datasheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ496 Mechanical Dimensions (Continued) DIP-16 1.524(0.060) TYP Unit: mm(inch) 7.320(0.288) 7.920(0.312) 5° 3.710(0.146) 4.310(0.170) 6° 6° 4° 4° 0.360(0.014) 0.560(0.022) 2.540(0.100) TYP 0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370) 0.510(0.020)MIN 3.000(0.118) 3.600(0.142) 0.700(0.028) 3.200(0.126) 3.600(0.142) Φ3.000(0.118) Depth 0.050(0.002) 0.150(0.006) 6.200(0.244) 6.600(0.260) 18.800(0.740) 19.200(0.756) R0.750(0.030) Note: Eject hole, oriented hole and mold mark is optional. BCD Semiconductor Manufacturing Limited Jun. 2011 Rev. 1. 0 12 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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