AZ494A/C voltage mode pulse width modulation switching regulator contr

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

AZ494A/C voltage mode pulse width modulation switching regulator contr

Datasheet Thumbnail

Top Searches for this datasheet

Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS General Description
AZ494A/C voltage mode pulse width modulation switching regulator control circuit designed primarily power supply control. AZ494A/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. AZ494A/C provides pushpull single-ended output operation, which selected through output control. difference between AZ494A AZ494C that they have 4.95V reference voltage respectively. AZ494A/C available standard packages DIP-16 SOIC-16.
AZ494A/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 AZ494A/C
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Configuration
Package (SOIC-16/DIP-16)
FEEDBACK
AZ494A/C
OUTPUT CTRL
Figure Configuration AZ494A/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 AZ494A/C Apr. 2007 Rev. Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Ordering Information AZ494A/C
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 AZ494AM Lead Free AZ494AM-E1 AZ494AMTR-E1 AZ494CM-E1 AZ494CMTR-E1 AZ494AP-E1 AZ494CP-E1
Marking Lead AZ494AM AZ494AM AZ494CM AZ494CM AZ494AP AZ494CP Lead Free AZ494AM-E1 AZ494AM-E1 AZ494CM-E1 AZ494CM-E1 AZ494AP-E1 AZ494CP-E1
Packing Type Tube Tape Reel Tube Tape Reel Tube Tube
SOIC-16 85oC
AZ494AMTR AZ494CM AZ494CMTR AZ494AP AZ494CP
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
AZ494A/C
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 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
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Electrical Characteristics
25oC, VCC=20V, f=10KHz unless otherwise noted.
Parameter Reference Section Output Reference Voltage AZ494A Output Reference Voltage AZ494C Line Regulation Load Regulation Short-Circuit Output Current Oscillator Section CT=0.001F, RT=30K, Oscillator Frequency fOSC CT=0.01F, RT=12K CT=0.01F, 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) VITH VCC=15V, 5.25V VCC=15V, VREF Zero Duty Cycle Maximum Duty Cycle CT=0.01F, RT=12K, 85oC 10.8 IREF=1mA VREF IREF=1mA, IREF=1mA VREF RLINE RLOAD IREF=1mA, 85oC IREF=1mA 10mA VREF
AZ494A/C
Symbol
Conditions
Unit
4.90 4.85 4.95
4.95 4.95
5.05 5.05
Apr. 2007 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 Output Saturation Voltage Emitter Follower Collector Off-State Current Emitter Off-State Current Total Device Supply Current Output Switching Characteristics Rise Time Fall Time Common Emitter Common Collector Common Emitter Common Collector VREF, VCC=15V (SAT) (SAT) (OFF) IE(OFF) =200mA 15V, -200mA 36V, VCC=36V 36V, -100 VITH ISINK Zero duty cycle 0.7V -0.3 -0.7 Symbol Conditions Unit
AZ494A/C
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Parametr Measurement information
Test Inputs 0.01uF 1IN+ 1IN2IN+ 2INOUTPUT CTRL FEEDBACK Output Output
AZ494A/C
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
AZ494A/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
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Performance Characteristics AZ494A/C
100k
VCC=20V TA=25
Oscillator Frequency (Hz)
0.001F
0.01F 0.1F
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
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Typical Applications
(VI=10V 40V) KSA1010 (VO=5V, IO=1A)
AZ494A/C
VI(+)
5.1k
FEED BACK
1INREF 2IN-
5.1k 5.1k
AZ494A
1IN+ 2IN+ OUTPUT CONTROL
0.001
VI(-)
Figure Pulse Width Modulated Step-Down Converter
Apr. 2007 Rev.
Semiconductor Manufacturing Limited
Data Sheet PULSE-WIDTH-MODULATION CONTROL CIRCUITS Mechanical Dimensions SOIC-16 Unit: mm(inch) AZ494A/C
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) AZ494A/C
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.
MAIN SITE Headquarters Semiconductor Manufacturing Limited
Semiconductor Manufacturing Limited Wafer 1600, Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE
Wafer Semiconductor Manufacturing Limited Shanghai Design Group SIM-BCD Semiconductor Manufacturing Co., Ltd. Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Shan Road, Shanghai 200233, China Zone 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 Office Semiconductor Corp. Office 30920 Huntwood Ave. Hayward, Semiconductor Corporation 94544, 30920 Huntwood Ave. Hayward, 94544, U.S.A +1-510-324-2988 Fax: +1-510-324-2788 +1-510-324-2988 Fax: +1-510-324-2788
Taiwan Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office Taiwan Office (Taiwan) Company Limited Semiconductor Shenzhen Office Room SIM-BCD Semiconductor Fuzhong Road, Futian District, Shenzhen, 298-1, Guang Road,(Taiwan) Company Limited Shanghai Noble Center, No.1006,Manufacturing Co., Ltd. Shenzhen Office Semiconductor Nei-Hu District, Taipei, 518026, China Taiwan 298-1, Guang Road, Nei-Hu District, Taipei, Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Tel: +86-755-8826 Center, Tel: Taiwan Room Noble 7951 No.1006, Fuzhong Road, Futian District, Shenzhen 518026, China +886-2-2656 2808 Fax:+86-755-8826 7951 +86-755-8826 7865 Fax: +886-2-2656 28062808 Tel: Tel: +886-2-2656 Fax: +86-755-8826 7865 Fax: +886-2-2656 2806

AZ494A/C voltage mode pulse width modulation switching regulator contr

Top Searches for this datasheet

Other recent searches