TL494CN

TL494 MOTOROLA | Alldatasheet

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/C0084/C0076/C0052/C0057/C0052 SEMICONDUCTOR TECHNICAL DATA SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

ORDERING INFORMATION

TA = 0° to +70°C TA = – 25° to +85°C Plastic Plastic PIN CONNECTIONS Order this document by TL494/D N SUFFIX PLASTIC PACKAGE CASE 648 C T R T Ground Inv Input ≈ 0.1 V Oscillator VCC 5.0 V REF (Top View) Noninv Input Inv Input Vref Output Control VCC Noninv Input Compen/PWN Comp Input Deadtime Control Error Amp

2 Error

(SO–16) TL494CD SO–16 1MOTOROLA ANALOG IC DEVICE DATA /C0083/C0087/C0073/C0084/C0067/C0072/C0077/C0079/C0068/C0069 /C0080/C0117/C0108/C0115/C0101 /C0087/C0105/C0100/C0116/C0104 /C0077/C0111/C0100/C0117/C0108/C0097/C0116/C0105/C0111/C0110 /C0067/C0111/C0110/C0116/C0114/C0111/C0108 /C0067/C0105/C0114/C0099/C0117/C0105/C0116 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 MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.) Rating Symbol TL494C TL494I 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–Ambient R θJA 80 °C/W Operating Junction Temperature TJ 125 °C Storage Temperature Range Tstg –55 to +125 °C Operating Ambient Temperature Range TL494C TL494I TA 0 to +70 –25 to +85 Derating Ambient Temperature TA 45 °C NOTE: 1. Maximum thermal limits must be observed.  Motorola, Inc. 1996 Rev 1

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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 kΩ Timing Capacitor C T 0.0047 0.001 10 µF Oscillator Frequency fosc 1.0 40 200 kHz ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 µF, RT = 12 kΩ , 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 µA Emitter Off–State Current VCC = 40 V, VC = 40 V, VE = 0 V) IE(off) – – –100 µA 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 µA 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 NOTE: 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

3MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 µF, RT = 12 kΩ , 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 µA Input Common Mode Voltage Range (VCC = 40 V, TA = 25°C) VICR –0.3 to VCC –2.0 V Open Loop Voltage Gain (ΔVO = 3.0 V, VO = 0.5 V to 3.5 V, RL = 2.0 kΩ) AVOL 70 95 – dB Unity–Gain Crossover Frequency (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ ) fC– – 350 – kHz Phase Margin at Unity–Gain (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ ) φm – 65 – deg. Common Mode Rejection Ratio (VCC = 40 V) CMRR 65 90 – dB Power Supply Rejection Ratio (ΔVCC = 33 V, VO = 2.5 V, RL = 2.0 kΩ ) 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 µA Maximum Duty Cycle, Each Output, Push–Pull Mode (VPin 4 = 0 V, CT = 0.01 µF, RT = 12 kΩ ) (VPin 4 = 0 V, CT = 0.001 µF, RT = 30 kΩ ) 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 µF, RT = 30 kΩ ) fosc – 40 – kHz Standard Deviation of Frequency* (CT = 0.001 µF, RT = 30 kΩ ) σfosc – 3.0 – % Frequency Change with Voltage (VCC = 7.0 V to 40 V, TA = 25°C) Δfosc (ΔV) – 0.1 – % Frequency Change with Temperature (ΔTA = Tlow to Thigh) (CT = 0.01 µF, RT = 12 kΩ ) Δfosc (ΔT) – – 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 µF, RT = 12 kΩ , 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, σ N n = 1 Σ (Xn – X)2 N – 1

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Figure 1. Representative Block Diagram Figure 2. Timing Diagram This device contains 46 active transistors.

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Figure 4. Open Loop Voltage Gain and Figure 5. Percent Deadtime versus Figure 6. Percent Duty Cycle versus Figure 7. Emitter–Follower Configuration Figure 8. Common–Emitter Configuration Figure 9. Standby Supply Current

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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

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Figure 21. Pulse Width Modulated Step–Down Converter

11MOTOROLA ANALOG IC DEVICE DATA OUTLINE DIMENSIONS N SUFFIX PLASTIC PACKAGE 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 /C0095/C0095/C0095/C0095 D SUFFIX PLASTIC PACKAGE CASE 751B–05 (SO–16) 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/C0095 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 /C0095/C0095/C0095/C0095

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Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. “Typical” parameters which may be provided in Motorola 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. Motorola does not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution;JAPAN : Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–54543–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315 INTERNET : http://Design–NET.com 51 Ting Kok R oad, Tai Po, N.T., Hong Kong. 852–26629298 TL494/D /C0042/C0084/C0076/C0052/C0057/C0052/C0047/C0068/C0042