AZ7500E

Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description The AZ7500E is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply control. The AZ7500E 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 AZ7500E provides for pushpull or single-ended output operation, which can be selected through the output control. AZ7500E is the enhanced version of AZ7500B for it improves REF Pin's reliability comparing with AZ7500B. The AZ7500E is available in standard packages of DIP-16 and SOIC-16. AZ7500E Features · · · · · · Stable 4.95V 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 SOIC-16 DIP-16 Figure 1. Package Types of AZ7500E Oct. 2008 Rev. 1. 2 1 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ7500E Pin Configuration M Package (SOIC-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 P Package (DIP-16) 2IN + 2IN REF OUTPUT CTRL VCC C2 E2 E1 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 Figure 2. Pin Configuration of AZ7500E (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 8 Q1 C1 Pulse-Steering Flip-Flop Dead-Time Control Comparator DTC 4 0.12V 9 D CK E1 C2 + 11 Q2 Error Amplifier 1 1IN + 1IN 1 2 + + PWM Comparator 10 E2 12 Error Amplifier 2 2IN + 2IN 16 15 VCC REF GND + 0.7mA Reference Regulator 14 7 FEEDBACK 3 Figure 3. Functional Block Diagram of AZ7500E Oct. 2008 Rev. 1. 2 2 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Ordering Information AZ7500E AZ7500 E1: Lead Free G1: Green TR: Tape and Reel Blank: Tube Circuit Type Reference Voltage E: 4.95V Package M: SOIC-16 P: DIP-16 Package Temperature Range Part Number Lead Free AZ7500EM-E1 Green AZ7500EM-G1 Marking ID Lead Free AZ7500EM-E1 Green AZ7500EM-G1 AZ7500EM-G1 AZ7500EP-G1 Packing Type Tube Tape & Reel Tube SOIC-16 DIP-16 -40 to 85 C o AZ7500EMTR-E1 AZ7500EP-E1 AZ7500EMTR-G1 AZ7500EM-E1 AZ7500EP-G1 AZ7500EP-E1 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Oct. 2008 Rev. 1. 2 3 BCD Semiconductor Manufacturing Limited 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 M Package RθJA P Package 260 -65 to 150 200 67 oC o AZ7500E Value 40 -0.3 to VCC + 0.3 40 250 73 Unit V V V mA o C/W C 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 Oct. 2008 Rev. 1. 2 4 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics TA = 25oC, VCC=20V, f=10KHz unless otherwise noted. Parameter Reference Section IREF=1mA Output Reference Voltage Line Regulation Load Regulation Short-Circuit Output Current Oscillator Section CT=0.001µF, RT=30KΩ, Oscillator Frequency fOSC CT=0.01µF, RT=12KΩ CT=0.01µF, RT=12KΩ, TA= -40 to 85oC Frequency Change with Temperature Dead-Time Control Section Input Bias Current Maximum Duty Cycle Input Threshold Voltage Error-Amplifier Section Input Offset Voltage Input Offset Current Input Bias Current Common-Mode Input Voltage Range Open-Loop Voltage Gain Unity-Gain Bandwidth Common-Mode Rejection Ratio Output Sink Current (Feedback) Output Source Current (Feedback) VIO IIO IBIAS VCM GVO BW CMRR ISINK ISOURCE VID = -15mV to -5V, V3 = 0.7V VID=15mV to 5V V3 = 3.5V 65 -0.3 2 V3 = 2.5V V3 = 2.5V V3 = 2.5V VCC=7V to 36V VO =0.5V to 3.5V -0.3 70 95 650 80 -0.7 2 25 0.2 10 250 1 VCC-2 mV nA µA V dB KHz dB mA mA IBIAS D(MAX) VITH VCC=15V, V4= 0 to 5.25V VCC=15V, V4= 0V, Pin 13= VREF Zero Duty Cycle Maximum Duty Cycle 0 45 3 3.3 -2 -10 µA % V ∆f /∆T CT=0.01µF, RT=12KΩ, TA= -40 to 85oC 9.2 9.0 40 10 10.8 12 KHz VREF RLINE RLOAD ISC IREF=1mA, TA= -40 to 85 C VCC = 7V to 36V IREF=1mA to 10mA VREF = 0V 10 o AZ7500E Symbol Conditions Min Typ Max Unit 4.90 4.85 4.95 4.95 2 1 35 5.0 5.05 25 15 50 V V mV mV mA 1 % Oct. 2008 Rev. 1. 2 5 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (Continued) Parameter PWM Comparator Section Input Threshold Voltage Input Sink Current Output Section Common Emitter Output Saturation Voltage Emitter Follower VCE (SAT) VCC (SAT) IC (OFF) IE(OFF) ICC VE = 0V, IC =200mA VCC = 15V, IE = -200mA VCE = 36V, VCC=36V VCC = VC = 36V, VE = 0 Pin 6 = VREF, VCC=15V Common Emitter Common Collector Common Emitter Common Collector 6 1.1 1.5 2 1.3 V 2.5 100 -100 µA µA VITH ISINK Zero duty cycle V3 = 0.7V -0.3 4 -0.7 4.5 V mA Symbol Conditions Min Typ Max Unit AZ7500E Collector Off-State Current Emitter Off-State Current Total Device Supply Current Output Switching Characteristics Rise Time Fall Time 10 mA tR tF 100 25 200 100 ns ns Oct. 2008 Rev. 1. 2 6 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parameter Measurement information VCC = 20V 12 4 Test Inputs 3 12KΩ 6 5 0.01uF 1 1IN+ 2 16 15 13 50KΩ 1IN2IN+ 2INOUTPUT CTRL GND 7 REF 14 VCC DTC FEEDBACK RT CT C1 E1 C2 E2 8 9 11 Output 2 10 150Ω 4W 150Ω 4W Output 1 AZ7500E Test Circuit Voltage at C1 VCC 0V VCC 0V Voltage at C2 Voltage at CT Threshold Voltage DTC 0V Threshold Voltage FEEDBACK 0.7V Duty Cycle 0% MAX 0% Voltage Waveforms Figure 4. Operational Test Circuit and Waveforms Oct. 2008 Rev. 1. 2 7 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parameter Measurement information (Continued) + VI Amplifier Under Test FEEDBACK AZ7500E + Vref Other Amplifier Figure 5. Error Amplifier Characteristics 20V 68Ω 4W Each Output Circuit Output CL = 15pF (See Note A) 90% tf tr 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) 68Ω 4W 10% tr 10% tf Note A: CL includes probe and jig capacitance. Figure 7. Emitter-Follower Configuration Oct. 2008 Rev. 1. 2 8 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Performance Characteristics AZ7500E 100k VCC=20V TA=25 C O f - Oscillator Frequency (Hz) 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 90 80 VCC=20V ∆VO=3V TA=25 C o Voltage Gain (dB) 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 Oct. 2008 Rev. 1. 2 9 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Applications (VI=10V to 40V) KSA1010 1mH 2A (VO=5V, IO=1A) AZ7500E VI(+) 47 150 0.1µ 1M 5.1k VO 12 VCC 11 C2 8 C1 3 FEED BACK 2 1INREF 14 + 15 1 16 5.1k 5.1k + 50µ 50V AZ7500E 2IN1IN+ 2IN+ 50µ 10V DTC GND 4 7 E1 9 OUTPUT CTRL 13 E2 10 RT 6 47k CT 5 150 50µ + 10V + 0.001µ GND 0.1 VI(-) Figure 10. Pulse Width Modulated Step-Down Converter Oct. 2008 Rev. 1. 2 10 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions SOIC-16 Unit: mm(inch) AZ7500E 1.300(0.051) 1.000(0.039) 1.650(0.065) 7° 0.700(0.028) 7° 0.406(0.016) A 20:1 0.500(0.020) 0.600(0.024) 10.000(0.394) φ 2.000(0.079) Depth 0.060(0.002) 0.100(0.004) B 0.250(0.010) 1° 5° R0.200(0.008) R0.200(0.008) 1.270(0.050) 6.040(0.238) 0.203(0.008) 0.150(0.006) 0.250(0.010) 0.250(0.010) 0.200(0.008)MIN C-C 50:1 3.940(0.155) 9.5 ° 8° B 20:1 C 0.200(0.008) S φ1.000(0.039) Depth 0.200(0.008) 1.000(0.039) 3° 7° 8° 8° A 0.400(0.016)×45° C Oct. 2008 Rev. 1. 2 11 BCD Semiconductor Manufacturing Limited Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions (Continued) DIP-16 Unit: mm(inch) AZ7500E Oct. 2008 Rev. 1. 2 12 BCD Semiconductor Manufacturing Limited 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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