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 Semiconductor Components Industries, LLC, 2004 April, 2004 − Rev. 5

1 Publication Order Number:

TL494, NCV494 SWITCHMODE Pulse Width Modulation Control Circuit The TL494 is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control.

  • Complete Pulse Width Modulation Control Circuitry
  • On−Chip Oscillator with Master or Slave Operation
  • On−Chip Error Amplifiers
  • On−Chip 5.0 V Reference
  • Adjustable Deadtime Control
  • Uncommitted Output Transistors Rated to 500 mA Source or Sink
  • Output Control for Push−Pull or Single−Ended Operation
  • Undervoltage Lockout
  • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.) Rating Symbol Value Unit Power Supply Voltage VCC 42 V Collector Output Voltage VC1 , VC2 42 V Collector Output Current (Each transistor) (Note 1) IC1 , IC2 500 mA Amplifier Input Voltage Range VIR −0.3 to +42 V Power Dissipation @ TA ≤ 45°C PD 1000 mW Thermal Resistance, Junction−to−AmbientR JA 80 °C/W Operating Junction Temperature TJ 125 °C Storage Temperature Range Tstg −55 to +125 °C Operating Ambient Temperature Range TL494B TL494C TL494I NCV494B TA −40 to +125 0 to +70 −40 to +85 −40 to +125 Derating Ambient Temperature TA 45 °C 1. Maximum thermal limits must be observed. PIN CONNECTIONS CT RT Ground Inv Input ≈ 0.1 V Oscillator VCC 5.0 V REF (Top View) Noninv Input Inv Input Vref Output Contro l V CC Noninv Input Compen/PWN Comp Input Deadtime Control Error Amp

2 Error

Device Package Shipping †

ORDERING INFORMATION

SO−16

48 Units/Rail

SO−16 D SUFFIX CASE 751B 1 1 TL494xD AWLYWW MARKING DIAGRAMS x = B, C or I A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week PDIP−16 N SUFFIX CASE 648 TL494xN AWLYYWW TL494CDR2 2500 Tape & ReelSO−16 TL494CN 25 Units/RailPDIP−16 TL494IN 25 Units/RailPDIP−16 SO−16 TL494BD 48 Units/Rail TL494BDR2 2500 Tape & ReelSO−16 http://onsemi.com *This marking diagram also applies to NCV494. NCV494BDR2* 2500 Tape & ReelSO−16 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. *NCV494: T low = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control.

TL494, NCV494 http://onsemi.com RECOMMENDED OPERATING CONDITIONS Characteristics Symbol Min Typ Max Unit Power Supply Voltage VCC 7.0 15 40 V Collector Output Voltage VC1 , VC2 − 30 40 V Collector Output Current (Each transistor) IC1 , IC2 − − 200 mA Amplified Input Voltage Vin −0.3 − VCC − 2.0 V Current Into Feedback Terminal lfb − − 0.3 mA Reference Output Current lref − − 10 mA Timing Resistor R T 1.8 30 500 k Timing Capacitor C T 0.0047 0.001 10 F Oscillator Frequency fosc 1.0 40 200 kHz ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 F, RT = 12 k, unless otherwise noted.) For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted. Characteristics Symbol Min Typ Max Unit REFERENCE SECTION Reference Voltage (IO = 1.0 mA) Vref 4.75 5.0 5.25 V Line Regulation (VCC = 7.0 V to 40 V) Reg line − 2.0 25 mV Load Regulation (IO = 1.0 mA to 10 mA) Reg load − 3.0 15 mV Short Circuit Output Current (Vref = 0 V) ISC 15 35 75 mA OUTPUT SECTION Collector Off−State Current (VCC = 40 V, VCE = 40 V) IC(off) − 2.0 100 A Emitter Off−State Current VCC = 40 V, VC = 40 V, VE = 0 V) IE(off) − − −100 A Collector−Emitter Saturation Voltage (Note 2) Common−Emitter (VE = 0 V, IC = 200 mA) Emitter−Follower (VC = 15 V, IE = −200 mA) Vsat(C) Vsat(E) 1.1 1.5 1.3 2.5 V Output Control Pin Current Low State (VOC 0.4 V) High State (VOC = Vref) IOCL IOCH 0.2 3.5 A mA Output Voltage Rise Time Common−Emitter (See Figure 12) Emitter−Follower (See Figure 13) tr 100 100 200 200 ns Output Voltage Fall Time Common−Emitter (See Figure 12) Emitter−Follower (See Figure 13) tf 100 100 ns 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

TL494, NCV494 http://onsemi.com ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 F, RT = 12 k, unless otherwise noted.) For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted. Characteristics Symbol Min Typ Max Unit ERROR AMPLIFIER SECTION Input Offset Voltage (VO (Pin 3) = 2.5 V) VIO − 2.0 10 mV Input Offset Current (VO (Pin 3) = 2.5 V) IIO − 5.0 250 nA Input Bias Current (VO (Pin 3) = 2.5 V) IIB − −0.1 −1.0 A Input Common Mode Voltage Range (VCC = 40 V, TA = 25°C) VICR −0.3 to VCC −2.0 V Open Loop Voltage Gain (VO = 3.0 V, VO = 0.5 V to 3.5 V, RL = 2.0 k) AVOL 70 95 − dB Unity−Gain Crossover Frequency (VO = 0.5 V to 3.5 V, RL = 2.0 k) fC− − 350 − kHz Phase Margin at Unity−Gain (VO = 0.5 V to 3.5 V, RL = 2.0 k) m − 65 − deg. Common Mode Rejection Ratio (VCC = 40 V) CMRR 65 90 − dB Power Supply Rejection Ratio (VCC = 33 V, VO = 2.5 V, RL = 2.0 k) PSRR − 100 − dB Output Sink Current (VO (Pin 3) = 0.7 V) IO− 0.3 0.7 − mA Output Source Current (VO (Pin 3) = 3.5 V) IO + 2.0 −4.0 − mA PWM COMPARATOR SECTION (Test Circuit Figure 11) Input Threshold Voltage (Zero Duty Cycle) VTH − 2.5 4.5 V Input Sink Current (V(Pin 3) = 0.7 V) II− 0.3 0.7 − mA DEADTIME CONTROL SECTION (Test Circuit Figure 11) Input Bias Current (Pin 4) (VPin 4 = 0 V to 5.25 V) IIB (DT) − −2.0 −10 A Maximum Duty Cycle, Each Output, Push−Pull Mode (VPin 4 = 0 V, CT = 0.01 F, RT = 12 k) (VPin 4 = 0 V, CT = 0.001 F, RT = 30 k) DC max Input Threshold Voltage (Pin 4) (Zero Duty Cycle) (Maximum Duty Cycle) Vth 2.8 3.3 V OSCILLATOR SECTION Frequency (CT = 0.001 F, RT = 30 k) fosc − 40 − kHz Standard Deviation of Frequency* (CT = 0.001 F, RT = 30 k) fosc − 3.0 − % Frequency Change with Voltage (VCC = 7.0 V to 40 V, TA = 25°C) fosc (V) − 0.1 − % Frequency Change with Temperature (TA = Tlow to Thigh) (CT = 0.01 F, RT = 12 k) fosc (T) − − 12 % UNDERVOLTAGE LOCKOUT SECTION Turn−On Threshold (VCC increasing, Iref = 1.0 mA) Vth 5.5 6.43 7.0 V TOTAL DEVICE Standby Supply Current (Pin 6 at Vref, All other inputs and outputs open) (VCC = 15 V) (VCC = 40 V) ICC 5.5 7.0 mA Average Supply Current (CT = 0.01 F, RT = 12 k, V(Pin 4) = 2.0 V) (VCC = 15 V) (See Figure 12) − 7.0 − mA * Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, N n = 1 (Xn − X)2 N − 1

Figure 14. Error−Amplifier Sensing Techniques Figure 15. Deadtime Control Circuit Figure 16. Soft−Start Circuit Figure 17. Output Connections for Single−Ended and Push−Pull Configurations

2.4 V ≤ VOC ≤ Vref

Figure 21. Pulse Width Modulated Step−Down Converter

TL494, NCV494 http://onsemi.com PACKAGE DIMENSIONS PDIP−16 N SUFFIX CASE 648−08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. −A− B F C S H G D J L M 16 PL SEATING 916 K PLANE−T− MAM0.25 (0.010) T DIM MIN MAX MIN MAX MILLIMETERSINCHES A 0.740 0.770 18.80 19.55 B 0.250 0.270 6.35 6.85 C 0.145 0.175 3.69 4.44 D 0.015 0.021 0.39 0.53 F 0.040 0.70 1.02 1.77 G 0.100 BSC 2.54 BSC H 0.050 BSC 1.27 BSC J 0.008 0.015 0.21 0.38 K 0.110 0.130 2.80 3.30 L 0.295 0.305 7.50 7.74 M 0 10 0 10 S 0.020 0.040 0.51 1.01 SO−16 D SUFFIX CASE 751B−05 ISSUE J NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 16 9 SEATING PLANE F JM R X 45 G

8 PLP−B−

−A− M0.25 (0.010) B S −T− D K C 16 PL SBM0.25 (0.010) A ST DIM MIN MAX MIN MAX INCHESMILLIMETERS A 9.80 10.00 0.386 0.393 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 M 0 7 0 7 P 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019

TL494, NCV494 http://onsemi.com ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone : 81−3−5773−3850 TL494/D SWITCHMODE is a trademark of Semiconductor Components Industries, LLC. LITERATURE FULFILLMENT : Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone : 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative.