AZ7500B/C voltage mode pulse width modulation switching regulator cont

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AZ7500B/C voltage mode pulse width modulation switching regulator cont

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Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
AZ7500B/C voltage mode pulse width modulation switching regulator control circuit designed primarily power supply control. AZ7500B/C consists reference voltage circuit, error amplifiers, on-chip adjustable oscillator, dead-time control (DTC) comparator, pulse-steering control flip-flop, output control circuit. precision voltage reference (VREF) improved through trimming this provides better output voltage regulation. AZ7500B/C provides pushpull single-ended output operation, which selected through output control. difference between AZ7500B AZ7500C that they have 4.95V reference voltage respectively. AZ7500B/C available standard packages DIP-16 SOIC-16.
AZ7500B/C
Stable 4.95V/5V Reference Voltage Trimmed ±1.0% Accuracy Uncommitted Output 200mA Sink Source Current Single-End Push-Pull Operation Selected Output Control Internal Circuitry Prohibits Double Pulse Either Output Complete Control Circuit with Variable Duty Cycle On-Chip Oscillator with Master Slave Operation
Applications
SMPS Back Light Inverter Charger
SOIC-16
DIP-16
Figure Package Types AZ7500B/C
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS AZ7500B/C
Package (DIP-16)
Configuration
Package (SOIC-16)
FEEDBACK
OUTPUT CTRL
FEEDBACK
OUTPUT CTRL
Figure Configuration AZ7500B/C (Top View)
Output Function Control Table
Signal Output Control VREF Output Function Single-ended parallel output Normal push-pull operation
Functional Block Diagram
OUTPUT CTRL
Oscillator
Pulse-Steering Flip-Flop
Dead-Time Control Comparator
0.12V
Error Amplifier
Comparator
Error Amplifier
0.7mA
Reference Regulator
FEEDBACK
Figure Functional Block Diagram AZ7500B/C Sep. 2009 Rev. Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Ordering Information AZ7500B/C
AZ7500
Lead Free
Circuit Type
Green Tape Reel Blank: Tube Package SOIC-16 DIP-16
Reference Voltage 4.95V 5.0V
Package
Temperature Range
Part Number Lead Free AZ7500BM-E1 Green AZ7500BM-G1 AZ7500BMTR-G1 AZ7500CM-G1 AZ7500CMTR-G1 AZ7500BP-G1 AZ7500CP-G1
Marking Lead Free AZ7500BM-E1 AZ7500BM-E1 AZ7500CM-E1 AZ7500CM-E1 AZ7500BP-E1 AZ7500CP-E1 Green AZ7500BM-G1 AZ7500BM-G1 AZ7500CM-G1 AZ7500CM-G1 AZ7500BP-G1 AZ7500CP-G1
Packing Type Tube Tape Reel Tube Tape Reel Tube Tube
SOIC-16 85oC
AZ7500BMTR-E1 AZ7500CM-E1 AZ7500CMTR-E1 AZ7500BP-E1 AZ7500CP-E1
DIP-16
Semiconductor's Pb-free products, designated with "E1" suffix part number, RoHS compliant. Products with "G1" suffix available green packages.
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Absolute Maximum Ratings (Note
Parameter Supply Voltage (Note Amplifier Input Voltage Collector Output Voltage Collector Output Current Package Thermal Impedance (Note Lead Temperature 1.6mm from case seconds Storage Temperature Range rating (Machine Model) TSTG Symbol Package Package Value -0.3 Unit
AZ7500B/C
Note Stresses greater than those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "Recommended Operating Conditions" implied. Exposure "Absolute Maximum Ratings"for extended periods affect device reliability. Note voltage values with respect network ground terminal. Note Maximum power dissipation function TJ(max), maximum allowable power dissipation allowable ambient temperature TJ(max) )/RJA. Operating absolute maximum 150oC 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 Input Voltage (Pin Operating Free-Air Temperature Symbol VC1, IC1, IREF fosc 0.00047 0.001 Unit
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics
Parameter Reference Section Output Reference Voltage AZ7500B Output Reference Voltage AZ7500C Line Regulation Load Regulation Short-Circuit Output Current Oscillator Section CT=0.001µF, RT=30K, Oscillator Frequency fOSC CT=0.01µF, RT=12K CT=0.01µF, RT=12K, 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) IBIAS CMRR ISINK ISOURCE -15mV -5V, 0.7V VID=15mV 3.5V -0.3 2.5V 2.5V 2.5V VCC=7V =0.5V 3.5V -0.3 -0.7 VCC-2 IBIAS D(MAX) VCC=15V, 5.25V VCC=15V, VREF Zero Duty Cycle Maximum Duty Cycle CT=0.01µF, RT=12K, 85oC 10.8 VREF IREF=1mA IREF=1mA, 85oC VREF IREF=1mA IREF=1mA, 85oC RLINE RLOAD IREF=1mA 10mA VREF 4.90 4.85 4.95 4.95 4.95 5.05 5.05
AZ7500B/C
25oC, VCC=20V, f=10KHz unless otherwise noted.
Symbol Conditions Unit
VITH
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (Continued)
Parameter Comparator Section Input Threshold Voltage Input Sink Current Output Section Common Emitter Emitter Follower (SAT) (SAT) (OFF) IE(OFF) =200mA 15V, -200mA 36V, VCC=36V 36V, VREF, VCC=15V Common Emitter Common Collector Common Emitter Common Collector -100 VITH ISINK Zero duty cycle 0.7V -0.3 -0.7 Symbol Conditions Unit
AZ7500B/C
Output Saturation Voltage
Collector Off-State Current Emitter Off-State Current Total Device Supply Current Output Switching Characteristics Rise Time Fall Time
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parametr Measurement information
Test Inputs 0.01uF FEEDBACK 1IN+ 1IN2IN+ 2INOUTPUT CTRL Output Output
AZ7500B/C
Test Circuit
Voltage Voltage Voltage
Threshold Voltage
Threshold Voltage
FEEDBACK 0.7V Duty Cycle
Voltage Waveforms Figure Operational Test Circuit Waveforms
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parametr Measurement information (Continued)
Amplifier Under Test FEEDBACK
AZ7500B/C
Vref Other Amplifier
Figure Error Amplifier Characteristics
Each Output Circuit Output 15pF (See Note
Note includes probe capacitance. Figure Common-Emitter Configuration
Each Output Circuit
Output 15pF (See Note
Note includes probe capacitance. Figure Emitter-Follower Configuration
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Performance Characteristics AZ7500B/C
100k
VCC=20V TA=25
Oscillator Frequency (Hz)
0.001µF
0.01µF 0.1µF
100k
Timing Resistance
Figure Oscillator Frequency
VCC=20V VO=3V TA=25
Voltage Gain (dB)
100k
Frequency (Hz)
Figure Error Amplifier Small-Signal Voltage Gain Frequency
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Applications
(VI=10V 40V) (VO=5V, IO=1A)
AZ7500B/C
VI(+)
KSA1010
0.1µ
5.1k
FEED BACK
1INREF 2IN1IN+ 2IN+
5.1k 5.1k
AZ7500B
OUTPUT CTRL
0.001µ
VI(-)
Figure Pulse Width Modulated Step-Down Converter
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions SOIC-16 Unit: mm(inch) AZ7500B/C
1.350(0.053) 1.750(0.069) 0.330(0.013) 0.510(0.020)
1.250(0.049) 1.650(0.065)
0.250(0.010)
20:1 0.400(0.016) 1.270(0.050)
9.800(0.386) 10.200(0.402)
R0.200(0.008) R0.200(0.008)
1.270(0.050)
0.170(0.007) 0.250(0.010)
5.800(0.228) 6.240(0.246) 3.800(0.150) 4.040(0.159)
0.050(0.002) 0.250(0.010)
0.200(0.008) 0.250(0.010)
50:1
20:1 0.200(0.008) 1.000(0.039) Depth 0.200(0.008)
1.000(0.039)
Note: Eject hole, oriented hole mold mark optional.
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions (Continued) DIP-16 Unit: mm(inch) AZ7500B/C
Note: Eject hole, oriented hole mark optional.
Sep. 2009 Rev.
Semiconductor Manufacturing Limited
Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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AZ7500B/C voltage mode pulse width modulation switching regulator cont

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