TL1451_08

UNISONIC TECHNOLOGIES CO., LTD TL1451 DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS DESCRIPTION The UTC TL1451 incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power supply control, the UTC TL1451 contains an on-chip 2.5V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common –emitter output transistor circuits. LINEAR INTEGRATED CIRCUIT SOP-16 DIP-16 TSSOP-16 Lead-free: TL1451L Halogen-free: TL1451G FEATURES *Complete PWM power control circuitry *Completely synchronized operation *Internal undervoltage lockout protection *Wide supply voltage range *Internal Short-Circuit protection *Oscillator frequency 500kHz max *Variable dead time provides control over total range *Internal regulator provides a stable 2.5V reference supply ORDERING INFORMATION Normal TL1451-S16-R TL1451-S16-T TL1451-P16-R TL1451-P16-T TL1451-D16-T Ordering Number Lead Free TL1451L-S16-R TL1451L-S16-T TL1451L-P16-R TL1451L-P16-T TL1451L-D16-T Halogen Free TL1451G-S16-R TL1451G-S16-T TL1451G-P16-R TL1451G-P16-T TL1451G-D16-T Package SOP-16 SOP-16 TSSOP-16 TSSOP-16 DIP-16 Packing Tape Reel Tube Tape Reel Tube Tube www.unisonic.com.tw Copyright © 2008 Unisonic Technologies Co., LTD 1 of 14 QW-R103-011.D TL1451 PIN CONFIGURATION CT RT ERROR AMPLIFIER 1 1 IN+ 1 IN- LINEAR INTEGRATED CIRCUIT 1 2 3 4 5 6 7 8 16 15 REF SCP ERROR AMPLIFIER 2 14 2 IN+ 13 2 IN12 11 10 9 1 FEEDBACK 1 DTC 1 OUT GND 2 FEEDBACK 2 DTC 2 OUT Vcc BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 14 QW-R103-011.D TL1451 PARAMETER Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified) VALUE UNIT 51 V 20 V 51 V 21 mA DIP-16 1000 mW Power Dissipation PD SOP-16 500 TSSOP-16 700 Junction Temperature TJ +125 °C Operating Temperature TOPR -20 ~ +85 °C Storage Temperature TSTG -40 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. SYMBOL VCC VIN VOUT IOUT RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current(each Transistor) Current into Feedback Terminal Feedback Resistor Timing Capacitor Timing Resistor Oscillator frequency Operating Temperature SYMBOL VCC VIN VOUT IOUT IFB RF CT RT FOSC TOPR MIN 3.6 1.05 TYP MAX 50 1.45 50 20 45 15000 100 350 85 UNIT V V V mA μA kΩ pF kΩ kHz °C 100 150 8 1 -20 ELECTRICAL CHARACTERISTICS(VCC=6V, f=200kHz, Ta=25°C, unless otherwise specified.) PARAMETER Reference Section Output Voltage Output Voltage Change with Temperature Input Voltage Regulation Output Voltage Regulation Short-Circuit Output Current Undervoltage Lockout Section Threshold Voltage (Vcc) Upper Lower △VIN △VOUT IOUT VTHR VHYS IOUT(REF)=0.1mA 80 1.5 0.65 140 -10 SYMBOL VOUT TEST CONDITIONS IOUT=1mA Ta= -20°C ~ 25°C Ta= 25°C ~ 85°C Vcc=3.6V ~ 40V IOUT=0.1mA ~ 1mA VOUT=0 MIN 2.4 TYP 2.5 -0.1 -0.2 2 1 10 2.72 2.6 120 1.9 0.7 185 60 -15 1.18 0.75 230 120 -20 MAX 2.6 ±1 ±1 12.5 7.5 30 UNIT V % mV mV mA V V mV V V mV mV μA V 3 Hysteresis (Vcc) Reset Threshold voltage (Vcc) Short-Circuit Protection Control Section Input Threshold Voltage(SCP) Standby Voltage(SCP) Latched Input Voltage (SCP) Input (source) Current Comparator Threshold Voltage (FEEDBACK) VIN(THR) VSTN-BY VIN(LAT) IIN(source) VTHR No pullup No pullup VIN=0.7V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 14 QW-R103-011.D TL1451 ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER Oscillator Section Frequency Standard deviation of frequency Frequency Change with Voltage Frequency Change with Temperature Dead-Time Control Section Input bias Current (DTC) Latch mode (source) Current (DTC) Latched Input Voltage (DTC) Input threshold Voltage at f=10kHz (DTC) Error-Amplifier Section Input Offset Voltage Input Offset Current Input Bias current Common-Mode Input Voltage Range Open-loop Voltage Amplification Unity-gain Bandwidth Common-mode Rejection Ratio Positive Output Voltage Swing Negative Output Voltage Swing Output (sink) Current (FEEDBACK) Output (source) Current (FEEDBACK) Output Section Collector off-state Current Output Saturation Voltage Short-Circuit Output Current PWM Comparator Section Input Threshold Voltage at f=10kHz (FEEDBACK) TOTAL DEVICE Standby Supply Current Average Supply Current SYMBOL F LINEAR INTEGRATED CIRCUIT TEST CONDITIONS CT=330pF, RT=10kΩ CT=330pF, RT=10kΩ Vcc=3.6V ~ 40V TA=-20°C ~ 25°C TA=25°C ~ 85°C MIN TYP 200 10% 1% -0.4 -0.2 MAX UNIT kHz ±2 ±2 1 % μA μA V V IIN(BIAS) VIN VIN(THR) IOUT=40μA Zero duty cycle Maximum duty cycle VOUT (FEEDBACK)=1.25V VOUT (FEEDBACK)=1.25V VOUT (FEEDBACK)=1.25V Vcc=3.6V ~ 40V RF=200kΩ BG RR VOUT VOUT IOUT(SIN) IOUT(SOU) VID=-0.1V, VOUT=1.25V VID=0.1V, VOUT=1.25V 1. 05~ 1.45 70 60 Vref-0.1 0.5 -45 -80 2.3 1.2 -145 2.05 1.45 2.25 VIN(OFF) IIN(OFF) IIN(BIAS) VIN(CM) 160 ±6 ±100 500 mV nA nA V 80 1.5 80 1 1.6 -70 10 2 dB MHz dB V V mA μA μA V mA IOFF VOUT=50V VOUT(SAT) IOUT=10mA IOUT(SHT) VOUT=6V Zero duty cycle Maximum duty cycle Off-state RT=10kΩ 1.2 90 2.05 1.45 1.3 1.7 VI(THR) 2.25 1.2 V ISTN-BY 1.8 2.4 mA mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 14 QW-R103-011.D TL1451 TEST CIRCUIT S1 CPE 0.47μF Test Input LINEAR INTEGRATED CIRCUIT VCC = 5V RL 4.7kΩ OUT1 16 15 14 13 12 11 10 9 RL 4.7kΩ OUT2 UTC TL1451 1 2 3 4 5 6 7 8 CT 330pF RT 10kΩ Test Input TIMING DIAGRAM Oscillator Triangle Waveform Error Amplifier Output Dead-Time Input Voltage Short-Circuit Protection Comparator Input Voltage PWM Comparator Output Voltage 2.0V 1.6V 1.4V 1.25V H L Dead Time 100% H L 0.6V Output Transistor Collector Waveform Protection Enable Terminal Waveform Short-Circuit Protection Comparator Output Power Supply Voltage 2.8V TYP 0V Tpe* H L 3.6V 0V * Protection Enable Time, tpe = (0.051 × 106 × Cpe) in seconds UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 14 QW-R103-011.D TL1451 APPLICATION INFORMATION LINEAR INTEGRATED CIRCUIT HIGH-SPEED DUAL SWITCHING REGULATOR VCC 220kΩ 470Ω 150Ω L1 0.47μF 50kΩ 33kΩ 33kΩ C1 500pF R1 R2 33kΩ 330pF R3 C2 Step-Up Output 33kΩ R4 Vref 16 15 14 13 12 11 10 9 UTC TL1451 1 2 3 4 5 6 7 8 470Ω C5 R5 500pF 33kΩ 33kΩ 470Ω 220Ω 470Ω 1μF L2 R6 C4 R7 Step-Down Output NOTE A: Values for R1 through R7, C1 through C4, and L1 and L2 depend upon individual application. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS 18 Protection Enable Time, tpe (s) 15 12 9 6 3 0 LINEAR INTEGRATED CIRCUIT Protection Enable Time vs Protection Enable Capacitance 0 150 250 50 200 100 Protection Enable Capacitance, CPE (μF) SCP 15 VREF 16 170kΩ VREF VREF Short-circuit Protection Comparator ERROR AMP 1 ERROR AMP 2 + 1.25V - 12kΩ CPE S R Protection Latch U.V.L.O. Closed-Loop Gain and Phase Shift vs Frequency 70 60 Closed-Loop Gain (dB) 50 40 30 20 10 0 100 1k 10k 100k 1M VCC = 5V RREF = 150Ω CREF = 470pF Ta = 25℃ CX: 47pF 470pF 4700pF Closed-Loop Gain (Left Scale) Phase Shift (Right Scale) 0° -10° -20° -30° -40° -50° -60° -70° -80° -90° Phase Shift Frequency, f (Hz) VREF 39kΩ 39kΩ CX + - RREF CREF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS(cont.) LINEAR INTEGRATED CIRCUIT Closed-Loop Gain and Phase Shift vs Frequency 70 60 Closed-Loop Gain (dB) 50 40 30 20 10 0 100 1k 10k 100k 1M VCC = 5V RREF = 15Ω CREF = 470pF Ta = 25℃ CX: Phase Shift (Right Scale) 47pF 470pF 4700pF -50° -60° -70° -80° -90° Frequency, f (Hz) VREF 39kΩ 39kΩ CX + - RREF CREF Closed-Loop Gain and Phase Shift vs Frequency 70 60 Closed-Loop Gain (dB) 50 40 30 20 10 0 100 1k 10k 100k 1M VCC = 5V RREF = 15Ω CREF = 470pF Ta = 25℃ CX: Phase Shift (Right Scale) 47pF 470pF 4700pF Closed-Loop Gain (Left Scale) 0° -10° -20° -30° -40° -50° -60° -70° -80° -90° Frequency, f (Hz) VREF 39kΩ 39kΩ CX + - RREF CREF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Phase Shift Phase Shift 8 of 14 QW-R103-011.D Closed-Loop Gain (Left Scale) 0° -10° -20° -30° -40° TL1451 TYPICAL CHARACTERISTICS(Cont.) LINEAR INTEGRATED CIRCUIT Closed-Loop Gain and Phase Shift vs Frequency 70 60 Closed-Loop Gain (dB) 50 40 30 20 10 0 100 1k 10k 100k 1M Closed-Loop Gain (Left Scale) Phase Shift (Right Scale) 0° -10° -20° -30° -40° -50° -60° -70° -80° -90° Phase Shift 9 of 14 QW-R103-011.D VCC = 5V CREF = 470pF Ta= 25℃ Frequency, f (Hz) VREF 39kΩ 39kΩ + - CREF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TL1451 TYPICAL CHARACTERISTICS(Cont.) O u tp u t S in k C u rre n t v s C o lle c to r O u tp u t S a tu ra tio n V o lta g e 120 110 100 Output Sink Current (mA) 90 80 70 60 50 40 30 20 10 0 0 5 10 V C C = 3 .6 V 15 20 T a = -2 0 ℃ Ta = 25℃ Ta = 85℃ LINEAR INTEGRATED CIRCUIT C o lle cto r O u tp u t S a tu ra tio n V o lta g e (V ) Maximum Output Voltage Swing vs Free-Air Temperature VO (REF) -0.01 Maximum Output Voltage Swing, VOM (V) VO (REF) -0.02 VO (REF) -0.03 VO (REF) -0.04 VO (REF) -0.05 VO (REF) -0.06 VO (REF) -0.07 -25 Maximum Output Voltage Swing (Right Scale) Maximum Output Voltage Swing (Right Scale) 1 Maximum Output Voltage Swing, VOM (V) 0.9 0.8 0.7 0.6 0.5 VREF 33kΩ + 33kΩ - RL Vvom - 1 100kΩ VCC = 3.6V RL = 100kΩ VOM+1 = 1.25V VOM-1 = 1.15V (Right Scale) VOM-1 = 1.35V (Left Scale) 0 25 50 75 100 Free-Air Temperature, Ta (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS 1M Triangle Oscillator Frequency, tOSC (Hz) LINEAR INTEGRATED CIRCUIT Oscillator Frequency Variation vs Free-Air Temperature VCC = 3.6V RT = 10kΩ CT = 330pF fOSC = 200kHz Triangle Oscillator Frequency vs Timing Resistance Oscillator Frequency Variation, ΔfOSC (%) 1M VCC = 5V Ta = 25 CT = 150pF 3 2 1 0 -1 -2 -3 100k CT = 1500pF 10k CT = 15000pF 1k 1k 4k 10k 40k 100k 400k -25 0 25 50 75 100 Timing Resistance, RT (Ω) Triangle Waveform Awing Voltage vs Timing Capacitance 2.6 Triangle Waveform Swing Voltage (V) 2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 101 102 103 104 105 10-1 101 VCC = 5V RT = 5.1kΩ Ta = 25℃ Free - Air Temperature, Ta ( ) Triangle Waveform Period vs Timing Capacitance VCC = 5V RT = 5.1kΩ Ta = 25℃ 102 Triangle Waveform Period (µ s) 101 100 102 103 104 105 Timing Capacitance, CT (pF) Timing Capacitance, CT (pF) Reference Output Voltage Variation, ΔVO(REF) (mV) 30 20 10 0 -10 -20 Reference Output Voltage Variation, ΔVO(REF) (mV) Reference Output Voltage Variation vs Free-Air Temperature VCC = 3.6V II(REF) = 1mA Reference Output Voltage Variation vs Free-Air Temperature 30 20 10 0 -10 -20 VCC = 40V II(REF) = 1mA -30 -25 0 25 50 75 100 -30 -25 0 25 50 75 100 Free - Air Temperature, Ta (℃) Free - Air Temperature, Ta (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS(Cont.) Reference Output Voltage vs Supply Voltage 3 Reference Output Voltage, VO(REF) (V) LINEAR INTEGRATED CIRCUIT Dropout Voltage Variation vs Free-Air Temperature 1.1 II(REF) = 1mA Dropout Voltage Variation (V) 1 0.9 0.8 0.7 0.6 Ta = 25℃ 2.5 2 1.5 1 0.5 0 0 5 10 15 20 25 30 35 40 -25 0 25 50 75 100 Supply Voltage, VCC (V) Undervoltage Lockout Hysteresis Characteristics Ta = 85℃ Output Collector Voltage, VCE (V) 5 4 3 2 7,12 8 Free - Air Temperature, Ta (℃) Undervoltage Lockout Characteristics II(REF) = 1mA 3.25 3 2.75 2.5 2.25 2 Threshold Voltage (Right Scale) Threshold Voltage-VTH (Left Scale) Threshold Voltage-VTL (Left Scale) 250 200 150 100 50 0 Undervoltage Lockout Hystersis Voltage (mV) Undervoltage Lockout Threshold Voltage (V) 3.5 300 6 Ta = 25℃ Ta = 20℃ 5V RL I = IO VDE 1 IO =10mA 0 0 1 2 3 4 5 -25 0 25 50 75 100 Supply Voltage, VCC (V) Free - Air Temperature, Ta (℃) Short-Circuit Protection Characteristics RS-Latch Reset Supply Voltage (V) 1.30 3 Gain (Amplfier In Unity-Gain Configuration) vs Frequency 10 VCC = 5V Ta = 25℃ Compretor Threshold Voltage (V) 5 0 G-Gain (dB) -5 -10 -15 -20 1k 10k 100k 1M 10M 1.25 Short-Circuit Protection Latch Reset Supply Voltage (Right Scale) 2.5 1.20 2 1.15 Short-Circuit Protection Comparator Threshold Voltage (Left Scale) 1.5 1.10 -25 0 25 50 75 100 1 Free - Air Temperature, Ta (℃) Frequency, f (Hz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 12 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS(Cont.) Error Amp Maximum Output Voltage Swing vs Frequency Error Amp Maxmum Output Voltage Swing (V) 2.25 2 1.75 1.5 1.25 1 1.75 0.5 0.25 0 1k 10k 100k 1M 10M Open-Loop Voltage Amplification (dB) VCC = 5V Ta = 25℃ LINEAR INTEGRATED CIRCUIT Open-Loop Voltage Amplification vs Frequency 90 80 70 60 50 40 30 20 10 0 100 1k 10k 100k 1M 2M VCC = 5V Ta = 25℃ Frequency, f (Hz) Frequency, f (Hz) Output Transistor on Duty Cycle vs Dead-Time Input Voltage 0 Output Transistor “On” Duty Cycle (%) 10 20 30 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 4 VCC = 3.6V RT = 10kΩ CT = 330pF Ta = 25℃ 2 Standby Current, ICC (mA) 1.75 1.5 1.25 1 0.75 0.5 0.25 0 0 Standby Current vs Supply Voltage 10 20 30 40 Dead-Time Input Voltage (V) Supply Voltage, VCC (V) Standby Current vs Free-Air Temperature Maximum Continuous Power Dissipation (mW) 2 Supply Current, ICC (mA) 1.75 1.5 1.25 1 0.75 0.5 0.25 0 -25 75 Free-Air Temperature, Ta (℃ ) 0 25 50 100 Stand-By Current, VCC = 3.6V, No Load Average Supply Current VCC = 6V, RT = 10kΩ CT = 330pF Stand-By Current, VCC = 40V, No Load Maximum Continuous Power Disspation vs Free-Air Temperature 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 -25 0 25 50 75 100 Thermal Resistance 250℃/W SOP-16 DIP-16 Thermal Resistance 125℃/W Free-Air Temperature, Ta (℃ ) 13 of 14 QW-R103-011.D UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TL1451 LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 14 of 14 QW-R103-011.D