AZ494B/D voltage mode pulse width modulation switching regulator contr

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AZ494B/D voltage mode pulse width modulation switching regulator contr

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Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
AZ494B/D voltage mode pulse width modulation switching regulator control circuit designed primarily power supply control. AZ494B/D consists reference voltage circuit, error amplifiers, on-chip adjustable oscillator, dead-time control (DTC) comparator, pulse-steering control flip-flop, output control circuit. AZ494B/D capable push-pull single-ended output operation, which selected through output control. AZ494B 4.95V AZ494D reference voltage respectively. precision voltage reference (VREF) improved 1.5% through trimming this provides better output voltage regulation. AZ494B/D available standard packages DIP-16 SOIC-16.
AZ494B/D
Stable 4.95V AZ494B AZ494D Reference Voltage Trimmed ±1.5% 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 AZ494B/D
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Configuration
Package (SOIC-16/DIP-16)
FEEDBACK
AZ494B/D
OUTPUT CTRL
Figure Configuration AZ494B/D (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 AZ494B/D
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Ordering Information AZ494B/D
AZ494
Lead Free
Circuit Type
Blank: Lead
Tape Reel
Blank: Tube
Reference Voltage 4.95V 5.0V
Package SOIC-16 DIP-16
Package
Temperature Range
Part Number Lead AZ494BM Lead Free AZ494BM-E1 AZ494BMTR-E1 AZ494DM-E1 AZ494DMTR-E1 AZ494BP-E1 AZ494DP-E1
Marking Lead AZ494BM AZ494BM AZ494DM AZ494DM AZ494BP AZ494DP Lead Free AZ494BM-E1 AZ494BM-E1 AZ494DM-E1 AZ494DM-E1 AZ494BP-E1 AZ494DP-E1
Packing Type Tube Tape Reel Tube Tape Reel Tube Tube
SOIC-16 85oC
AZ494BMTR AZ494DM AZ494DMTR AZ494BP AZ494DP
DIP-16
Semiconductor's Pb-free products, designated with "E1" suffix part number, RoHS compliant.
Apr. 2007 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
AZ494B/D
Value -0.3
Unit
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 Amplifier Input Voltage Collector Output Voltage Collector Output Current (Each Transistor) Current Into Feedback Terminal Oscillator Frequency Timing Capacitor Timing Resistor Operating Free-Air Temperature Reference Output Current fosc IREF 0.47 Symbol -0.3 10000 Unit
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics
25oC, VCC=15V, f=10KHz unless otherwise noted.
Parameter Reference Section AZ494B Output Reference Voltage Line Regulation Load Regulation Short-Circuit Output Current(Note AZ494D VREF VREF RLINE RLOAD IREF=1mA IREF=1mA IREF=1mA 10mA VREF 4.875 4.925 4.95 5.025 5.075 Symbol Conditions (Note Unit
AZ494B/D
Oscillator Section, 0.01F, (See Figure Frequency Standard Deviation Frequency (Note Frequency Change with Voltage Frequency Change with Temperature (Note Error-Amplifier Section Input Offset Voltage Input Offset Current Input Bias Current Common-Mode Input Voltage Range Large-Signal Gain Open-Loop Voltage IBIAS CMRR ISINK ISOURCE VCC=7V -15mV -5V, V(FEEDBACK) 0.7V 15mV V(FEEDBACK) 3.5V 36V, VCC=36V 36V, =200mA 15V, -200mA (FEEDBACK) 2.5V (FEEDBACK) 2.5V (FEEDBACK) 2.5V VCC=7V =2K, =0.5V 3.5V -0.3 VCC2 fosc values VCC, constant VCC=7V 36V, 25oC Hz/KHz Hz/KHz Hz/KHz
Unity-Gain Bandwidth Common-Mode Rejection Ratio Output Sink Current (FEEDBACK) Output Source Current (FEEDBACK) Output Section Collector Off-State Current Emitter Off-State Current Collector-Emitter Saturation Voltage Common Emitter Emitter Follower
-100
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics (Continued)
Parameter Output Control Input Current Dead-Time Control Section Input Bias Current Maximum Duty Cycle, Each Output Input Threshold Voltage Comparator Section (See Figure Input Threshold Voltage (FEEDBACK) Input Sink Current (FEEDBACK) Total Device Standby Supply Current ISTDBY VRT=VREF, other inputs outputs open (DEAD-TIME-CTRL) Figure Zero duty cycle V(FEEDBACK) 0.7V -0.3 -0.7 5.25V (DEAD-TIME CTRL) =0.01F, =12K Zero Duty Cycle Maximum Duty Cycle Symbol Conditions (Note VREF Unit
AZ494B/D
Average Supply Current Switching Characteristics Rise Time Fall Time Rise Time Fall Time
Common-emitter Configuration Figure Emitter-follower Configuration Figure
Note conditions shown MAX, appropriate value specified under recommended operating conditions. Note Duration short circuit should exceed second. Note Standard deviation measure statistical distribution about mean derived from formula:
Note Temperature coefficient timing capacitor timing resistor taken into account.
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parameter Measurement information
Test Inputs
AZ494B/D
FEEDBACK 1IN+
Output
Output
0.01F
1IN2IN+ 2INOUTPUT CTRL
Test Circuit
Voltage
Voltage Voltage
Threshold Voltage
Threshold Voltage FEEDBACK 0.7V Duty Cycle
Voltage Waveforms Figure Operational Test Circuit Waveforms
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parametr Measurement information (Continued)
Amplifier Under Test FEEDBACK
AZ494B/D
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
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Performance Characteristics AZ494B/D
100k
0.001F Oscillator Frequency (Hz)
VCC=15V TA=25
0.01F
0.1F
CT=1F
100k
Timing Resistance
Figure Oscillator Frequency
VCC=15V VO=3V TA=25
Voltage Gain (dB)
100k
Frequency (Hz)
Figure Error Amplifier Small-Signal Voltage Gain Frequency
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions SOIC-16 Unit: mm(inch) AZ494B/D
1.300(0.051)
1.000(0.039)
1.650(0.065)
0.700(0.028)
0.406(0.016) 20:1 0.500(0.020) 0.600(0.024)
10.000(0.394)
2.000(0.079) Depth 0.060(0.002) 0.100(0.004)
0.250(0.010)
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
50:1
3.940(0.155)
20:1 0.200(0.008) 1.000(0.039)
Depth 0.200(0.008)
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
1.000(0.039)
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions (Continued) DIP-16 Unit: mm(inch) AZ494B/D
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE Semiconductor Manufacturing Limited reserves right make changes without further notice products specifications herein. Semiconductor Manufacturing Limited does assume responsibility products particular purpose, does Semiconductor Manufacturing Limited assume liability arising application products circuits. Semiconductor Manufacturing Limited does convey license under patent rights other rights rights others.
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AZ494B/D voltage mode pulse width modulation switching regulator contr

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