UNISONIC TECHNOLOGIES CO., LTD TL1451 LINEAR INTEGRATED CIRCUIT DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS SOP-16 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. 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 www.unisonic.com.tw Copyright (c) 2008 Unisonic Technologies Co., LTD Halogen Free TL1451G-S16-R TL1451G-S16-T TL1451G-P16-R TL1451G-P16-T TL1451G-D16-T Package Packing SOP-16 SOP-16 TSSOP-16 TSSOP-16 DIP-16 Tape Reel Tube Tape Reel Tube Tube 1 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION CT 1 16 REF RT 2 15 SCP 1 IN+ 3 14 2 IN+ 1 IN- 4 13 2 IN- 1 FEEDBACK 5 12 2 FEEDBACK 1 DTC 6 11 2 DTC 1 OUT 7 10 2 OUT GND 8 9 ERROR AMPLIFIER 1 ERROR AMPLIFIER 2 Vcc BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise specified) PARAMETER SYMBOL VCC VIN VOUT IOUT 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. Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current 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 100 150 8 1 -20 MAX 50 1.45 50 20 45 UNIT V V V mA A k pF k kHz C 15000 100 350 85 ELECTRICAL CHARACTERISTICS(VCC=6V, f=200kHz, Ta=25C, unless otherwise specified.) PARAMETER Reference Section Output Voltage SYMBOL VOUT Output Voltage Change with Temperature VIN VOUT Input Voltage Regulation Output Voltage Regulation Short-Circuit Output Current Undervoltage Lockout Section Threshold Voltage (Vcc) IOUT Upper Lower 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) IOUT=1mA Ta= -20C ~ 25C Ta= 25C ~ 85C Vcc=3.6V ~ 40V IOUT=0.1mA ~ 1mA VOUT=0 MIN TYP MAX UNIT 2.4 2.6 1 1 12.5 7.5 30 V 3 2.5 -0.1 -0.2 2 1 10 80 1.5 2.72 2.6 120 1.9 VTHR VHYS VIN(THR) VSTN-BY VIN(LAT) IIN(source) VTHR UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS IOUT(REF)=0.1mA No pullup No pullup VIN=0.7V 0.65 140 -10 0.7 185 60 -15 1.18 % mV mV mA V V mV V 0.75 230 120 -20 V mV mV A V 3 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER Oscillator Section Frequency Standard deviation of frequency Frequency Change with Voltage SYMBOL F Frequency Change with Temperature Dead-Time Control Section Input bias Current (DTC) Latch mode (source) Current (DTC) Latched Input Voltage (DTC) TEST CONDITIONS CT=330pF, RT=10k CT=330pF, RT=10k Vcc=3.6V ~ 40V TA=-20C ~ 25C TA=25C ~ 85C 200 10% 1% -0.4 -0.2 VIN IOUT=40A Zero duty cycle Maximum duty cycle Error-Amplifier Section Input Offset Voltage Input Offset Current Input Bias current VIN(OFF) IIN(OFF) IIN(BIAS) VOUT (FEEDBACK)=1.25V VOUT (FEEDBACK)=1.25V VOUT (FEEDBACK)=1.25V Common-Mode Input Voltage Range VIN(CM) Vcc=3.6V ~ 40V RF=200k BG RR VOUT VOUT IOUT(SIN) IOUT(SOU) -80 2.3 1.2 ISTN-BY UNISONIC TECHNOLOGIES CO., LTD 2.05 1.45 1. 05~ 1.45 70 60 Vref-0.1 2 2 2.25 6 100 500 0.5 -45 Zero duty cycle Maximum duty cycle 80 1.5 80 Off-state RT=10k 1.6 -70 1.2 90 1.2 % A A V V mV nA nA V 1 VID=-0.1V, VOUT=1.25V VID=0.1V, VOUT=1.25V UNIT kHz -145 160 IOFF VOUT=50V VOUT(SAT) IOUT=10mA IOUT(SHT) VOUT=6V VI(THR) MAX 1 VIN(THR) www.unisonic.com.tw TYP IIN(BIAS) Input threshold Voltage at f=10kHz (DTC) 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 MIN 10 2 2.05 1.45 2.25 1.3 1.7 1.8 2.4 dB MHz dB V V mA A A V mA V mA mA 4 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT Test Input S1 VCC = 5V CPE 0.47F RL 4.7k OUT1 16 15 14 13 12 11 10 9 OUT2 RL 4.7k UTC TL1451 1 CT 330pF 2 3 4 5 6 7 8 RT 10k Test Input TIMING DIAGRAM Oscillator Triangle Waveform 2.0V 1.6V 1.4V 1.25V Error Amplifier Output Dead-Time Input Voltage Short-Circuit Protection Comparator Input Voltage PWM Comparator Output Voltage H L Dead Time 100% H Output Transistor Collector Waveform L 0.6V Protection Enable Terminal Waveform 0V Tpe* H Short-Circuit Protection Comparator Output Power Supply Voltage 2.8V TYP L 3.6V 0V * Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION HIGH-SPEED DUAL SWITCHING REGULATOR VCC 220k 0.47F 150 470 50k 33k L1 330pF R1 R2 33k R3 C2 33k 33k Step-Up Output R4 C1 500pF Vref 16 15 14 13 12 11 10 9 UTC TL1451 1 2 3 4 5 6 7 8 470 470 R5 C5 220 500pF 1F L2 R6 C4 33k 470 33k 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 Protection Enable Time vs Protection Enable Capacitance Protection Enable Time, tpe (s) 18 15 12 9 6 3 0 0 150 250 50 200 100 Protection Enable Capacitance, CPE (F) VREF SCP 16 15 170k Short-circuit Protection Comparator 12k VREF S R Protection Latch CPE ERROR AMP 1 VREF U.V.L.O. ERROR AMP 2 + 1.25V - Closed-Loop Gain and Phase Shift vs Frequency 60 50 VCC = 5V RREF = 150 CREF = 470pF Ta = 25 CX: 47pF 470pF 4700pF Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 0 -10 -20 -30 -40 40 30 Phase Shift 70 Closed-Loop Gain (dB) LINEAR INTEGRATED CIRCUIT -50 -60 -70 -80 -90 20 10 0 100 10k 1k 100k 1M Frequency, f (Hz) VREF + - 39k 39k UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CX RREF CREF 7 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS(cont.) Closed-Loop Gain and Phase Shift vs Frequency VCC = 5V RREF = 15 CREF = 470pF Ta = 25 Closed-Loop Gain (dB) 60 50 CX: Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 47pF 470pF 4700pF 0 -10 -20 -30 -40 40 30 Phase Shift 70 -50 -60 -70 -80 -90 20 10 0 100 1k 1M 100k 10k Frequency, f (Hz) VREF + - CX 39k RREF CREF 39k Closed-Loop Gain and Phase Shift vs Frequency 60 50 VCC = 5V RREF = 15 CREF = 470pF Ta = 25 CX: Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 47pF 470pF 4700pF 0 -10 -20 -30 -40 40 30 Phase Shift 70 Closed-Loop Gain (dB) LINEAR INTEGRATED CIRCUIT -50 -60 -70 -80 -90 20 10 0 100 1k 100k 10k 1M Frequency, f (Hz) VREF + - 39k 39k UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CX RREF CREF 8 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS(Cont.) Closed-Loop Gain and Phase Shift vs Frequency 70 60 VCC = 5V CREF = 470pF Ta= 25 50 40 Closed-Loop Gain (Left Scale) 0 -10 -20 -30 -40 Phase Shift (Right Scale) 30 Phase Shift Closed-Loop Gain (dB) LINEAR INTEGRATED CIRCUIT -50 -60 -70 -80 -90 20 10 0 100 10k 1k 100k 1M Frequency, f (Hz) VREF + - 39k 39k UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CREF 9 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT 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 T a = -2 0 110 Ta = 25 Output Sink Current (mA) 100 Ta = 85 90 80 70 60 50 40 30 20 V C C = 3 .6 V 10 0 5 0 20 15 10 C o lle cto r O u tp u t S a tu ra tio n V o lta g e (V ) VO (REF) -0.01 1 VO (REF) -0.02 0.9 Maximum Output Voltage Swing (Right Scale) VO (REF) -0.03 VO (REF) -0.04 VO (REF) -0.05 0.7 Maximum Output Voltage Swing (Right Scale) 0.6 0.5 VO (REF) -0.06 VO (REF) -0.07 -25 0.8 0 25 50 75 Maximum Output Voltage Swing, VOM (V) Maximum Output Voltage Swing, VOM (V) Maximum Output Voltage Swing vs Free-Air Temperature VREF 33k + 33k - RL Vvom - 1 100k VCC = 3.6V RL = 100k VOM+1 = 1.25V VOM-1 = 1.15V (Right Scale) VOM-1 = 1.35V (Left Scale) 100 Free-Air Temperature, Ta () UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 14 QW-R103-011.D TL1451 TYPICAL CHARACTERISTICS Triangle Oscillator Frequency vs Timing Resistance Triangle Oscillator Frequency, tOSC (Hz) 1M 3 VCC = 5V Ta = 25 Oscillator Frequency Variation, fOSC (%) LINEAR INTEGRATED CIRCUIT CT = 150pF 100k CT = 1500pF 10k CT = 15000pF 1k 4k 1k 10k 40k 100k 0 -1 -2 -25 50 75 Free - Air Temperature, Ta ( ) Triangle Waveform Awing Voltage vs Timing Capacitance Triangle Waveform Period vs Timing Capacitance 102 2.4 2.2 Triangle Waveform Period ( s) VCC = 5V RT = 5.1k Ta = 25 2 1.8 1.6 1.4 1.2 100 VCC = 5V RT = 5.1k Ta = 25 101 100 1 10-1 101 0.8 101 102 103 104 105 Timing Capacitance, CT (pF) Reference Output Voltage Variation vs Free-Air Temperature 30 20 VCC = 3.6V II(REF) = 1mA 10 0 -10 -20 -30 -25 0 25 50 75 100 Free - Air Temperature, Ta () UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 102 103 104 105 Timing Capacitance, CT (pF) Reference Output Voltage Variation, VO(REF) (mV) Reference Output Voltage Variation, VO(REF) (mV) 25 0 Timing Resistance, RT () 2.6 Triangle Waveform Swing Voltage (V) VCC = 3.6V RT = 10k CT = 330pF fOSC = 200kHz 1 -3 1M 400k 2 Oscillator Frequency Variation vs Free-Air Temperature Reference Output Voltage Variation vs Free-Air Temperature 30 20 VCC = 40V II(REF) = 1mA 10 0 -10 -20 -30 -25 0 25 50 75 100 Free - Air Temperature, Ta () 11 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Dropout Voltage Variation vs Free-Air Temperature Reference Output Voltage vs Supply Voltage 1.1 Ta = 25 II(REF) = 1mA 2.5 1 Dropout Voltage Variation (V) Reference Output Voltage, VO(REF) (V) 3 2 1.5 1 0.5 0.9 0.8 0.7 0.6 0 10 15 20 25 30 35 40 0 -25 Supply Voltage, VCC (V) Undervoltage Lockout Hysteresis Characteristics Ta = 25 Ta = 20 Output Collector Voltage, VCE (V) Ta = 85 5 4 3 5V RL 2 7,12 I = IO 8 VDE 1 IO =10mA 0 0 1 2 3 4 3.5 300 3.25 2.75 100 Threshold Voltage (Right Scale) 2.25 0 75 100 Short-Circuit Protection Comparator Threshold Voltage (Left Scale) 1.5 1 1.10 75 100 Free - Air Temperature, Ta () UNISONIC TECHNOLOGIES CO., LTD VCC = 5V Ta = 25 5 0 G-Gain (dB) 2 RS-Latch Reset Supply Voltage (V) Compretor Threshold Voltage (V) 50 Gain (Amplfier In Unity-Gain Configuration) vs Frequency 2.5 1.20 www.unisonic.com.tw 25 0 Free - Air Temperature, Ta () Short-Circuit Protection Latch Reset Supply Voltage (Right Scale) 50 50 2 -25 3 25 150 2.5 5 1.30 0 200 Threshold Voltage-VTL (Left Scale) 10 -25 250 Threshold Voltage-VTH (Left Scale) 3 Short-Circuit Protection Characteristics 1.15 100 II(REF) = 1mA Supply Voltage, VCC (V) 1.25 75 50 Undervoltage Lockout Characteristics Undervoltage Lockout Threshold Voltage (V) 6 25 Free - Air Temperature, Ta () Undervoltage Lockout Hystersis Voltage (mV) 5 0 -5 -10 -15 -20 1k 10k 100k 1M 10M Frequency, f (Hz) 12 of 14 QW-R103-011.D TL1451 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Open-Loop Voltage Amplification vs Frequency 2.25 90 VCC = 5V Ta = 25 2 Open-Loop Voltage Amplification (dB) Error Amp Maxmum Output Voltage Swing (V) Error Amp Maximum Output Voltage Swing vs Frequency 1.75 1.5 1.25 1 1.75 0.5 0.25 0 10k 1k 1M 100k VCC = 5V Ta = 25 80 70 60 50 40 30 20 10 0 100 10M 1k 10k 100k Frequency, f (Hz) Frequency, f (Hz) Output Transistor on Duty Cycle vs Dead-Time Input Voltage Standby Current vs Supply Voltage 1M 2M VCC = 3.6V RT = 10k CT = 330pF 20 Ta = 25 2 Standby Current, ICC (mA) Output Transistor "On" Duty Cycle (%) 0 10 30 40 50 60 70 80 1.75 1.5 1.25 1 0.75 0.5 0.25 90 100 0 0 0.5 1 1.5 2 2.5 3 3.5 0 4 Stand-By Current, VCC = 40V, No Load 1.25 1 Stand-By Current, VCC = 3.6V, No Load 0.75 0.5 0.25 0 -25 0 25 50 75 Free-Air Temperature, Ta ( ) 100 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Maximum Continuous Power Dissipation (mW) Supply Current, ICC (mA) 1.5 40 Maximum Continuous Power Disspation vs Free-Air Temperature Average Supply Current VCC = 6V, RT = 10k CT = 330pF 1.75 30 Supply Voltage, VCC (V) Standby Current vs Free-Air Temperature 2 20 10 Dead-Time Input Voltage (V) 1200 1100 1000 DIP-16 Thermal Resistance 125/W 900 800 700 600 500 SOP-16 400 Thermal Resistance 250/W 300 200 100 0 -25 0 25 50 75 100 Free-Air Temperature, Ta ( ) 13 of 14 QW-R103-011.D 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