UNITRODE UC1524A UC2524A UC3524A handbook
Contents
1. periods that one output conducts Note Duty Cycle is percent of two clock 1 2 3 4 5 PWM INPUT VOLTAGE PIN 9 V Output Dead Time vs Timing Capacitor Value OUTPUT DEAD TIME us 10 5 0 2 0 1 0 0 5 0 2 0 1 20V 2700Q 25 C Note Dead Time osc output width plus output delay pulse 1 2 5 10 20 50 100 TIMING CAPACITOR Cr nF OSCILLATOR FREQUENCY Hz OPEN LOOP VOLTAGE GAIN dB COLLECTOR TO EMITTER VOLTAGE V UC1524A UC2524A UC3524A Error Amplifier Voltage Gain and Phase vs Frequency T T RL co l RL 1MA RL 300kQ MRAVA RL 7100k9 RL 30kQ RL is impedance from pin 9 to ground Values below L 30kQ will begin to limit the maximum duty cycle o 180 _ PHAS 270 L 360 100 1k 10k 100k 1M 10M FREQUENCY hZ ASVHd dOO1 N4dd0 Oo Oscillator Frequency vs Timing Components M Vin 20V Ts 25 C Cy 1 Ong r S20 Ong x 1115 RrOT 2 5 10 50 TIMING RESISTOR RT nF2. Output Saturation Voltage a A a N oa 50 100 150 200 250 OUTPUT COLLECTOR CURRENT mA UC1524A UC2524A UC3524A Current Limit Amplifier Delay Shutdown Delay From PWM Comparator Pin 9 Output At Pi Overdrive l lt 5 10 20 50 VIN 20V RL 2kQ TJ 25 C OUTPUT V Output At Pin 12 OR 13 OUTPUT V At Pin 4 Vin Pin Pin Input At Pin 9 J te Minimum input pulse width to _ latch is 200ns 1 2 3 INPUT V ONORA O Wm INPUT V 1 2 DELAY TIME us DELAY TIME us a VIN 20V RL 2kQ Ti 25 C __ OUTPUT V Output At Pin 12 or 13 Input at INPUT V Minimum input pulse latch is 200ns 0 1 2 DELAY TIME us K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 4 Mar 2005 PACKAGING INFORMATION Orderable Device Status Package Package Pins Package Eco Plan Lead Ball Finish MSL Peak Temp Type Drawing Qty 5962 8764502EA ACTIVE CDIP J 16 1 None A42 SNPB Level NC NC NC UC1524AJ ACTIVE CDIP J 16 1 None A42 SNPB Level NC NC NC UC1524AuJ 80503 ACTIVE CDIP J 16 1 None A
3. Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DSP dsp ti com Broadband www ti com broadband Interface interface ti com Digital Control www ti com digitalcontrol Logic logic ti com Military www ti com military Power Mgmt power ti com Optical Networking www ti com opticalnetwork Microcontrollers microcontroller ti com Security www ti com security Telephony www ti com telephony Video amp Imaging www ti com video Wireless www ti com wireless Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2005 Texas Instruments Incorporated
4. 10MQ 72 80 64 80 dB Gain Bandwidth TJ 25 C Av 0dB 1 3 1 3 MHz DC Transconductance Tu 25 C 30kQ lt RL lt 1MQ 1 7 2 3 1 7 2 3 mS P W M Comparator RT 2kQ CT 0 01mfd Minimum Duty Cycle Vcomp 0 5V 0 0 Maximum Duty Cycle VcoMP 3 8V 45 45 Current Limit Amplifier Unless otherwise specified Pin 5 OV Input Offset Voltage TJ 25 C E A Set for Maximum 190 200 210 180 200 220 mV Output Over Operating Temperature Range 180 220 170 230 mV Input Bias Current 1 10 1 10 uA Common Mode Rejection Ratio V pin 5 0 3V to 5 5V 50 60 50 60 dB Power Supply Rejection Ratio VIN 10 to 40V 50 60 50 60 dB Output Swing Note 1 Minimum Total Range 5 0 0 5 5 0 0 5 V Open Loop Voltage Gain AVO 1 to 4V RL 2 10MQ 70 80 70 80 dB Delay Time Pin 4 to Pin 9 AVIN 300mV 300 300 ns Output Section Each Output Collector Emitter Voltage Ilc 1004A 60 80 60 80 V Collector Leakage Current VcE 50V 1 20 a 20 HA These parameters are ensured by design but not 100 tested in production DC transconductance gm relates to DC open loop voltage gain according to the following equation Av gMRL where RL is the resistance from pin 9 to the common mode voltage The minimum gm specification is used to calculate minimum Av when the error amplifier output is loaded Note 1 Min Limit applies to output high level max limit applies to output low level UC1524A UC2524A UC3524A ELECTRICAL CHARACTERISTICS Unless otherwise
5. Input 2 VIN OSC Sync 3 Emitter B C L Sense Collector B C L Sense Collector A Bos a fa S S S Jo gt Jo for foo fro B RT Emitter A pe oO CT Shutdown Ground Compensation ELECTRICAL CHARACTERISTICS Unless otherwise stated these specifications apply for TA 55 C to 125 C for the UC1524A 40 to 85 C for the UC2524A and 0 C to 70 C for the UC3524A VIN Vc 20V TA Ty UC1524A UC2524A UC3524A UNITS PARAMETER TEST CONDITIONS min TYP max MIN TYP MAX Turn on Characteristics Input Voltage Operating Range after Turn on 8 40 8 40 V Turn on Threshold 6 5 7 5 8 5 6 5 7 5 8 5 V Turn on Current VIN 6V 2 5 4 2 5 4 mA Operating Current VIN 8 to 40V 5 10 5 10 mA Turn on Hysteresis 0 5 0 5 V Reference Section Output Voltage TJ 25 C 4 95 5 00 5 05 4 90 5 00 5 10 V Over Operating Range 4 9 5 1 4 85 5 15 V Line Regulation VIN 10 to 40V 10 20 10 30 mV Load Regulation IL 0 to 20 mA 20 25 20 35 mV Temperature Stability Over Operating Range 20 25 20 35 mV Short Circuit Current VREF 0 25 C lt Tu lt 125 C 80 100 80 100 mA Output Noise Voltage 10Hz lt f lt 10kHz Ty 25 C 40 40 uVrms Long Term Stability TJ 125 C 1000 Hrs 20 50 20 50 mV These para
6. other limited information may not be available for release In no event shall TI s liability arising out of such information exceed the total purchase price of the TI part s at issue in this document sold by TI to Customer on an annual basis Addendum Page 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries Tl reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment Tl warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using TI components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeg
7. stated these specifications apply for Ta 55 C to 125 C for the UC1524A 40 to 85 C for the UC2524A and 0 C to 70 C for the UC3524A VIN Vc 20V Ta Tuy UC1524A UC2524A UC3524A UNITS PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX Output Section cont Each Output Saturation Voltage Ic 20mA 2 4 2 4 V Ic 200mA 1 2 2 1 2 2 V Emitter Output Voltage IE 50mA 17 18 17 18 V Rise Time TJ 25 C R 2kQ 120 400 120 400 ns Fall Time TJ 25 C R 2kQ 25 200 25 200 ns Comparator Delay TJ 25 C Pin 9 to output 300 300 ns Shutdown Delay TJ 25 C Pin 10 to output 200 200 ns Shutdown Threshold TJ 25 C RC 2kQ 0 6 7 1 0 0 6 WA 1 0 V S D Threshold Over Temp Over Operating Temperature Range 0 4 1 2 0 4 1 0 V Thermal Shutdown 165 165 C These parameters are ensured by design but not 100 tested in production OPEN LOOP CIRCUIT Collector UC1524A DUT Collector Emitter Error Amp Current Limit _ a Emitter N I Inv CT Input Input Comp Sense Sense S D Gnd E A Control QUIESCENT CURRENT mA O NWOAKRATON CO OO Supply Current vs Voltage x E gt a 2 O wW Z Q W pj oO gt 2 gt 2 A Note Outputs o 10 20 30 40 50 SUPPLY VOLTAGE V V Pulse Width Modulator Transfer Function
8. 42 SNPB Level NC NC NC UC1524AJ883B ACTIVE CDIP J 16 1 None A42 SNPB Level NC NC NC UC1524AL ACTIVE LCCC FK 20 1 None POST PLATE Level NC NC NC UC1524AL883B ACTIVE LCCC FK 20 1 None POST PLATE Level NC NC NC UC2524ADW ACTIVE SOIC DW 16 40 None CU NIPDAU Level 2 220C 1 YEAR UC2524ADWTR ACTIVE SOIC DW 16 2000 None CU NIPDAU Level 2 220C 1 YEAR UC2524AJ ACTIVE CDIP J 16 1 None A42 SNPB Level NC NC NC UC2524AN ACTIVE PDIP N 16 25 None CU SNPB Level NA NA NA UC2524ANG4 ACTIVE PDIP N 16 1000 Green RoHS amp CU NIPDAU Level NA NA NA no Sb Br UC3524ADW ACTIVE SOIC DW 16 40 None CU NIPDAU Level 2 220C 1 YEAR UC3524ADWTR ACTIVE SOIC DW 16 2000 None CU NIPDAU Level 2 220C 1 YEAR UC3524AJ ACTIVE CDIP J 16 1 None A42 SNPB Level NC NC NC UC3524AN ACTIVE PDIP N 16 25 None CU SNPB Level NA NA NA The marketing status values are defined as follows ACTIVE Product device recommended for new designs LIFEBUY TI has announced that the device will be discontinued and a lifetime buy period is in effect NRND Not recommended for new designs Device is in production to support existing customers but TI does not recommend using this part in a new design PREVIEW Device has been announced but is not in production Samples may or may not be available OBSOLETE TI has discontinued the production of the device 2 Eco Plan May not be currently available please check http www ti com productcontent for the latest availability information and addit
9. NPUT N I INPUT CL SENSE CL SENSE B SHUTDOWN GND UDG 99178 SLUS181A NOVEMBER 1999 UC1524A UC2524A UC3524A ABSOLUTE MAXIMUM RATINGS CONNECTION DIAGRAMS Supply Voltage VIN 0 6 eee eee 40V Collector Supply Voltage VC onna 0 0 0 e eee eee 60V PLCC 20 LCC 20 TOP VIEW Output Current each Output aooaa aaan anaana 200mA Q or L Package Maximum Forced Voltage Pin 9 10 3 to 5V PACKAGE PIN FUNCTION Maximum Forced Current Pin 9 10 10mA FUNCTION Reference Output Current 0 00000 50mA N C Oscillator Charging Current 0 0 eee ee eee 5mA Inv Input Power Dissipation at TA 25 C 1000mWw Nor lihy ngut Power Dissipation at Tc 25 C o a 2000mW nip Operating Temperature Range 55 C to 125 C OSC SYNC Storage Temperature Range 65 C to 150 C C L sense Lead Temperature Soldering 10 seconds 300 C N C Note Consult packaging section of Databook for thermal limita C L sense tions and considerations of package Rt CT Ground N C Compensation Shutdown Emitter A Collector A N C Collector B Emitter B VIN 5V VREF DIL 16 SOIC 16 TOP VIEW J or N Package DW Package U 5V VREF Inv Input 1 Non Inv
10. O0 0 5962 8764502EAN 0 0 Unitrode Products from Texas Instruments UC1524A UC2524A UC3524A Advanced Regulating Pulse Width Modulators FEATURES Fully Interchangeable with Standard UC1524 Family Precision Reference Internally Trimmed to 1 High Performance Current Limit Function Under Voltage Lockout with Hysteretic Turn on Start Up Supply Current Less Than 4mA Output Current to 200mA 60V Output Capability Wide Common Mode Input Range for both Error and Current Limit Amplifiers PWM Latch Insures Single Pulse per Period Double Pulse Suppression Logic 200ns Shutdown through PWM Latch Guaranteed Frequency Accuracy Thermal Shutdown Protection BLOCK DIAGRAM DESCRIPTION The UC1524A family of regulating PWM ICs has been designed to retain the same highly versatile architecture of the industry standard UC1524 SG1524 while offering substantial improvements to many of its limitations The UC1524A is pin compatible with non A models and in most existing applications can be directly interchanged with no effect on power supply performance Using the UC1524A however frees the designer from many concerns which typically had required additional circuitry to solve The UC1524A includes a precise 5V reference trimmed to 1 accuracy elimi nating the need for potentiometer adjustments an error amplifier with an input range which includes 5V eliminating the need for a reference divider a current
11. ional product content details None Not yet available Lead Pb Free Pb Free RoHS TI s terms Lead Free or Pb Free mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances including the requirement that lead not exceed 0 1 by weight in homogeneous materials Where designed to be soldered at high temperatures TI Pb Free products are suitable for use in specified lead free processes Green RoHS amp no Sb Br TI defines Green to mean Pb Free and in addition uses package materials that do not contain halogens including bromine Br or antimony Sb above 0 1 of total product weight 3 MSL Peak Temp The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications and peak solder temperature Important Information and Disclaimer The information provided on this page represents TI s knowledge and belief as of the date that it is provided Tl bases its knowledge and belief on information provided by third parties and makes no representation or warranty as to the accuracy of such information Efforts are underway to better integrate information from third parties TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals TI and TI suppliers consider certain information to be proprietary and thus CAS numbers and
12. meters are ensured by design but not 100 tested in production 2 ELECTRICAL CHARACTERISTICS UC1524A UC2524A UC3524A Unless otherwise stated these specifications apply for TA 55 C to 125 C for the UC1524A 40 to 85 C for the UC2524A and 0 C to 70 C for the UC3524A VIN Vc 20V TAa Ty UC1524A UC2524A UC3524A UNITS PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX Oscillator Section Unless otherwise specified RT 2700Q CT 0 01 mfd Initial Accuracy TJ 25 C 41 43 45 39 43 47 kHz Over Operating Range 40 2 45 9 38 2 47 9 kHz Temperature Stability Over Operating Temperature Range 1 2 1 2 Minimum Frequency RT 150kQ CT 0 1mfd 140 120 Hz Maximum Frequency RT 2 0kQ CT 470pF 500 500 kHz Output Amplitude 3 3 5 3 3 5 V Output Pulse Width 0 29 0 5 1 0 0 3 0 5 1 0 us Ramp Peak 3 3 3 5 3 7 3 3 3 5 3 7 V Ramp Valley TJ 25 C 0 7 0 8 0 9 0 7 0 8 0 9 V Ramp Valley T C 1 0 1 0 mV C Error Amplifier Section Unless otherwise specified Vcm 2 5V Input Offset Voltage 0 5 5 2 10 mV Input Bias Current 1 5 1 10 HA Input Offset Current 05 1 0 5 1 HA Common Mode Rejection Ratio Vcm 1 5 to 5 5V 70 80 70 80 dB Power Supply Rejection Ratio VIN 10 to 40V 70 80 70 80 dB Output Swing Note 1 5 0 0 5 5 0 0 5 V Open Loop Voltage Gain AVO 1 to 4V RL gt
13. sense amplifier useful in either the ground or power supply output lines and a pair of 60V 200mA uncommitted transistor switches which greatly enhance out put versatility An additional feature of the UC1524A is an under voltage lockout circuit which disables all the internal circuitry except the reference until the input voltage has risen to 8V This holds standby current low until turn on greatly simplifying the design of low power off line supplies The turn on circuit has approximately 600mvV of hysteresis for jitter free activation Other product enhancements included in the UC1524A s design include a PWM latch which insures freedom from multiple pulsing within a period even in noisy environments logic to eliminate double pulsing on a single output a 200ns ex ternal shutdown capability and automatic thermal protection from excessive chip temperature The oscillator circuit of the UC1524A is usable beyond 500kHz and is now easier to synchronize with an external clock pulse The UC1524A is packaged in a hermetic 16 pin DIP and is rated for operation from 55 C to 125 C The UC2524A and 3524A are available in either ceramic or plastic packages and are rated for operation from 40 C to 85 C and 0 C to 70 C respectively Surface mount devices are also available 5V REFERENCE REGULATOR POWER TO INTERNAL CIRCUITRY COMP INV I
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