TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 FEATURES • • • • • • • • • • (1) Controlled Baseline – One Assembly/Test Site, One Fabrication Site Enhanced Diminishing Manufacturing Sources (DMS) Support Enhanced Product-Change Notification Qualification Pedigree (1) Complete Pulse-Width Modulation (PWM) Power-Control Circuitry Completely Synchronized Operation Internal Undervoltage Lockout Protection Wide Supply-Voltage Range Internal Short-Circuit Protection Oscillator Frequency . . . 500 kHz Max • • Variable Dead Time Provides Control Over Total Range Internal Regulator Provides a Stable 2.5-V Reference Supply D PACKAGE (TOP VIEW) CT RT Error 1IN+ Amplifier 1 1IN − 1FEEDBACK 1DTC 1OUT GND 1 16 2 15 3 14 4 13 5 12 6 7 11 10 8 9 REF SCP 2IN+ Error 2IN− Amplifier 2 2FEEDBACK 2DTC 2OUT VCC Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. DESCRIPTION/ORDERING INFORMATION The TL1451A-EP 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 TL1451A-EP contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits. The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational. The TL1451A-EP is characterized for operation from –55°C to 125°C. ORDERING INFORMATION PACKAGE (1) TA –55°C to 125°C (1) SOIC – D Tape and reel ORDERABLE PART NUMBER TL1451AMDREP TOP-SIDE MARKING TL1451EPG4 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2005, Texas Instruments Incorporated On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 FUNCTIONAL BLOCK DIAGRAM 2DTC Error Amplifier 2 2IN+ 2IN− 2 FEEDBACK 1 FEEDBACK SCP VCC RT 9 2 11 14 13 CT 1 10 + 12 Oscillator 1/2 Vref 5 15 16 R S 1IN− 3 4 REF UVLO R 1IN+ PWM COMP Reference Voltage 12 kΩ 170 kΩ Error Amplifier 1 2OUT − + 7 − 1OUT PWM Comparator 1DTC 6 8 GND COMPONENT COUNT Resistors 65 Capacitors 8 Transistors JFETs 105 18 Absolute Maximum Ratings (1) over operating free-air temperature range MIN MAX UNIT VCC Supply voltage 51 V VI Amplifier input voltage 20 V VO Collector output voltage 51 V IO Collector output current 21 mA Continuous power total dissipation TA Operating free-air temperature range Tstg Storage temperature range Lead temperature (1) 2 See Dissipation Rating Table M suffix 1,6 mm (1/16 in) from case for 10 s –55 125 °C –65 150 °C 260 °C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 Dissipation Ratings PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING TA = 125°C POWER RATING D 1088 mW 8.7 mW/°C 696 mW 566 mW 218 mW Recommended Operating Conditions MIN VCC Supply voltage VI Amplifier input voltage VO IO MAX UNIT 3.6 50 V 1.05 1.45 V Collector output voltage 50 V Collector output current 20 mA Current into feedback terminal 45 µA RF Feedback resistor 100 CT Timing capacitor 150 15000 RT Timing resistor 5.1 100 kΩ 1 500 kHz –55 125 °C MAX UNIT Oscillator frequency TA Operating free-air temperature M suffix kΩ pF Reference Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER Output voltage (pin 16) TEST CONDITIONS IO = 1 mA TA = 25°C MIN 2.4 2.5 2.6 2.35 2.46 2.65 –0.63% ±4% (2) 2 12.5 TA = 125°C 0.7 15 TA = MIN 0.3 30 1 7.5 TA = 125°C 0.3 14 TA = MIN 0.3 20 10 30 TA = MIN and 125°C Output voltage change with temperature TA = 25°C Input voltage regulation VCC = 3.6 V to 40 V TA = 25°C Output voltage regulation Short-circuit output current (1) (2) IO = 0.1 mA to 1 mA VO = 0 TYP (1) 3 V mV mV mA All typical values are at TA = 25°C, unless otherwise indicated. These parameters are not production tested. 3 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 Undervoltage Lockout Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER Upper threshold voltage (VCC) TEST CONDITIONS MIN TA = 25°C 2.72 TA = 125°C 1.7 TA = MIN Lower threshold voltage (VCC) Reset threshold voltage (VCC) 2.6 TA = 125°C 1.65 UNIT V V 3.09 TA = 25°C 80 120 TA = 125°C 10 50 TA = MIN 10 60 TA = 25°C 1.5 TA = 125°C 0.95 TA = MIN (1) MAX 3.15 TA = 25°C TA = MIN Hysteresis (VCC) TYP (1) mV V 1.5 All typical values are at TA = 25°C, unless otherwise indicated. Short-Circuit Protection Control Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS Input threshold voltage (SCP) TYP (1) MAX TA = 25°C 650 700 750 TA = 125°C 400 478 650 TA = MIN 800 880 950 140 Standby voltage (SCP) Latched input voltage (SCP) MIN 185 230 TA = 25°C 60 120 TA = 125°C 70 120 60 120 TA = MIN UNIT mV mV mV Equivalent timing resistance 170 kΩ Comparator threshold voltage (FEEDBACK) 1.18 V (1) All typical values are at TA = 25°C, unless otherwise indicated. Oscillator Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER Frequency Standard deviation of frequency Frequency change with voltage TEST CONDITIONS CT = 330 pF, RT = 10 kΩ CT = 330 pF, VCC = 3.6 V to 40 V TA = 25°C 200 TA = 125°C 195 TA = MIN 193 RT = 10 kΩ 2% TA = 25°C 1% TA = 125°C 1% TA = MIN Frequency change with temperature (1) (2) 4 All typical values are at TA = 25°C, unless otherwise indicated. These parameters are not production tested. MIN TYP (1) MAX kHz 3% 1.37% UNIT ±10% (2) TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 Dead-Time Control Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS Input bias current (DTC) 1 TA = MIN and 125°C 3 –80 Latched input voltage (DTC) TA = 25°C 2.3 TA = 125°C 2.22 TA = MIN 2.28 Maximum duty cycle UNIT µA –145 µA 2.32 V 2.4 Zero duty cycle Input threshold voltage at f = 10 kHz (DTC) MAX TA = 25°C Latch mode (source) current (DTC) (1) (2) TYP (1) MIN 2.25 (2) 2.05 1.2 (2) V 1.45 All typical values are at TA = 25°C, unless otherwise indicated. These parameters are not production tested. Error-Amplifier Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER Input offset voltage Input offset current Input bias current Common-mode input voltage range Open-loop voltage amplification TEST CONDITIONS VO (FEEDBACK) = 1.25 V VO (FEEDBACK) = 1.25 V VO (FEEDBACK) = 1.25 V TYP (1) ±7 TA = 125°C ±10 TA = MIN ±12 TA = 25°C ±100 TA = 125°C ±100 TA = MIN ±200 TA = 25°C 160 500 TA = 125°C 100 500 TA = MIN 142 700 1.05 to 1.45 70 80 TA = 125°C 70 80 TA = MIN 64 Common-mode rejection ratio 60 Positive output voltage swing 2 Output (source) current (FEEDBACK) (1) nA nA dB 80 MHz 80 dB V 1 VID = 0.1 V, VO = 1.25 V mV 1.5 Negative output voltage swing VID = –0.1 V, VO = 1.25 V UNIT V TA = 25°C Unity-gain bandwidth Output (sink) current (FEEDBACK) MAX TA = 25°C VCC = 3.6 V to 40 V RF = 200 kΩ MIN TA = 25°C 0.5 1.6 TA = 125°C 0.4 1.8 TA = MIN 0.3 1.7 TA = 25°C –45 –70 TA = 125°C –25 –50 TA = MIN –15 –70 V mA µA All typical values are at TA = 25°C, unless otherwise indicated. 5 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 Output Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS Collector off-state current MIN TYP (1) VO = 50 V 10 TA = 25°C Output saturation voltage TA = 125°C Short-circuit output current (1) MAX 1.2 2 1.6 2.4 TA = MIN 1.36 2.2 VO = 6 V 90 UNIT µA V mA All typical values are at TA = 25°C, unless otherwise indicated. PWM Comparator Section Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS Zero duty cycle Input threshold voltage at f = 10 kHz (FEEDBACK) (1) (2) MIN Maximum duty cycle 1.2 (2) TYP (1) MAX 2.05 2.25 (2) 1.45 UNIT V All typical values are at TA = 25°C, unless otherwise indicated. These parameters are not production tested. Total Device Electrical Characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP (1) MAX UNIT Standby supply current Off-state 1.3 1.8 mA Average supply current RT = 10 kΩ 1.7 2.4 mA (1) 6 All typical values are at TA = 25°C, unless otherwise indicated. TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 PARAMETER MEASUREMENT INFORMATION Test Input S1 VCC = 5 V RL CPE 0.47 µF 4.7 kΩ OUT1 RL 4.7 kΩ 16 15 14 13 12 11 10 OUT2 9 TL1451A-EP 1 CT 330 pF 2 3 4 5 6 7 8 RT 10 kΩ Test Input Figure 1. Test Circuit Oscillator Triangle Waveform Error-Amplifier Output Dead-Time Input Voltage Short-Circuit Protection Comparator Input Voltage PWM Comparator Output Voltage 2.0 V 1.6 V 1.4 V 1.25 V H L Dead Time 100% H Output Transistor Collector Waveform L 0.6 V Protection Enable Terminal Waveform 0V tpe(1) H Short-Circuit Protection Comparator Output Power-Supply Voltage L 2.8 V TYP 3.6 V 0V (1) Protection enable time, tpe = (0.051 x 106 x Cpe) in seconds Figure 2. TL1451A-EP Timing 7 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS Years Estimated Life 70 60 50 40 30 20 10 0 105 115 125 135 145 Continous Tj – °C Figure 3. Estimated Deviced Life at Elevated Temperatures for Wirebond Voiding Fail Mode 3 VCC = 5 V TA = 25°C CT = 150 pF 100 k CT = 1500 pF 10 k CT = 15000 pF 1k 1k 4k 10 k 40 k 100 k 400 k RT − Timing Resistance − Ω Figure 4. Triangle Oscillator Frequency vs Timing Resistance 8 f osc − Oscillator Frequency Variation − % ∆afosc ffosc osc − Triangle Oscillator Frequency − Hz 1M 1M 2 1 0 −1 VCC = 3.6 V RT = 10 kΩ CT = 330 pF fosc = 200 kHz −2 −3 −25 0 25 50 75 TA − Free-Air Temperature − °C Figure 5. Oscillator Frequency Variation vs Free-Air Temperature 100 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 102 2.6 VCC = 5 V RT = 5.1 kΩ TA = 25°C Triangle Waveform Period − uS µs Triangle Waveform Swing Voltage − V 2.4 2.2 2 1.8 1.6 1.4 1.2 VCC = 5 V RT = 5.1 kΩ TA = 25°C 101 100 1 0.8 101 102 103 104 CT − Timing Capacitance − pF 10−1 101 105 30 VCC = 3.6 V II(ref) = 1 mA 20 10 0 −10 − 20 − 30 − 25 0 25 50 75 TA − Free-Air Temperature − °C Figure 8. Reference Output Voltage Variation vs Free-Air Temperature 105 Figure 7. Triangle Waveform Period vs Timing Capacitance avref − Reference Output Voltage Variation − mV ∆VO(ref) avref − Reference Output Voltage Variation − mV ∆VO(ref) Figure 6. Trangle Waveform Swing Voltage vs Timing Capacitance 102 103 104 CT − Timing Capacitance − pF 100 30 VCC = 40 V II(ref) = 1 mA 20 10 0 −10 − 20 − 30 − 25 0 25 50 75 TA − Free-Air Temperature − °C 100 Figure 9. Reference Output Voltage Variation vs Free-Air Temperature 9 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 1.1 II(ref) = 1 mA TA = 25°C 2.5 1 Dropout Voltage Variation − V VO(ref) Vref − Reference Output Voltage − V 3 2 1.5 1 0.9 0.8 0.7 0.6 0.5 0 5 10 15 20 25 30 VCC − Supply Voltage − V 35 − 25 40 Figure 10. Reference Output Voltage vs Supply Voltage − Output Collector Voltage − V VVCE CE TA = 85°C TA = 25°C 4 3 5V RL 7,10 I = IO 8 VDE 1 IO = 10 mA 0 0 1 2 3 4 VCC − Supply Voltage − V Figure 12. Undervoltage Lockout Hysteresis Characteristics 10 300 3.5 TA = −20°C 5 2 100 Figure 11. Dropout Voltage Variation vs Free-air Temperature Undervoltage Lockout Threshold Voltage − V 6 0 25 50 75 TA − Free-Air Temperature − °C 5 3.25 Threshold Voltage −VTH (Left Scale) 3 250 200 Threshold Voltage −VTL (Left Scale) 2.75 150 2.5 100 Hysteresis Voltage (Right Scale) 50 2.25 0 2 −25 0 25 50 75 100 TA − Free-Air Temperature − °C Figure 13. Undervoltage Lockout Characteristics Undervoltage Lockout Hystersis Voltage − mV 0 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) Comparator Threshold Voltage − V Short-Circuit Protection Latch Reset Supply Voltage (Right Scale) 1.25 2.5 2 1.20 Short-Circuit Protection Comparator Threshold Voltage (Left Scale) 1.15 1.10 − 25 1.5 0 25 50 75 TA − Free-Air Temperature − °C RS − Latch Reset Supply Voltage − V 3 1.30 1 100 Figure 14. Short-Circuit Protection Characteristics 18 tpe t pe − Protection Enable Time − s 15 12 9 6 3 0 0 50 100 150 200 CPE − Protection Enable Capacitance − µF SCP 15 Vref 16 170 kΩ Short-circuit Protection Comparator 12 kΩ CPE ERROR AMP 1 ERROR AMP 2 250 Vref S R Protection Latch Vref U.V.L.O. + 1.25 V − Figure 15. Protection Enable Time vs Protection Enable Capacitance 11 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 2 90 VCC = 5 V TA = 25°C Open-Loop Voltage Amplification − dB Error Amp Maximum Output Voltage Swing − V 2.25 1.75 1.5 1.25 1 0.75 0.5 0.25 0 1k 10 k 100 k f − Frequency − Hz 1M VCC = 5 V TA = 25°C 80 70 60 50 40 30 20 10 0 100 10 M Figure 16. Error Amplifier Maximum Output Voltage Swing vs Frequency 1k 10 k 100 k f − Frequency − Hz Figure 17. Open-Loop Voltage Amplification vs Frequency 10 VCC = 5 V TA = 25°C 5 G − Gain − dB 0 −5 −10 −15 −20 1k 10 k 100 k 1M 10 M f − Frequency − Hz Figure 18. Gain (Amplifier in Unity-Gain Configuration vs Frequency) 12 1M 2M TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 70 Phase Shift (Right Scale) 50 40 47 pF 470 pF 4700 pF 0° Closed-Loop Gain (Left Scale) −10° −20° 30 −30° Phase Shift Closed-Loop Gain − dB 60 CX: VCC = 5 V Rref = 150 Ω Cref = 470 pF TA = 25°C −40° −50° 20 −60° −70° 10 −80° 0 100 1k 10 k 100 k −90° 1M f − Frequency − Hz Vref + − 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 19. Closed-Loop Gain and Phase Shift vs Frequency 13 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 70 CX: Phase Shift (Right Scale) 50 Closed-Loop Gain (Left Scale) 40 47 pF 470 pF 4700 pF 0° −10° −20° 30 −30° −40° −50° 20 −60° −70° 10 −80° 0 100 1k 10 k 100 k f − Frequency − Hz Vref + − 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 20. Closed-Loop Gain and Phase Shift vs Freqency 14 −90° 1M Phase Shift Closed-Loop Gain − dB 60 VCC = 5 V Rref = 15 Ω Cref = 470 pF TA = 25°C TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 70 CX: 50 40 Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 47 pF 470 pF 4700 pF 0° −10° −20° 30 −30° Phase Shift Closed-Loop Gain − dB 60 VCC = 5 V Rref = 15 Ω Cref = 470 pF TA = 25°C −40° −50° 20 −60° −70° 10 −80° 0 100 1k 10 k 100 k −90° 1M f − Frequency − Hz Vref + − 39 kΩ Cx Rref Cref 39 kΩ Test Circuit Figure 21. Closed-Loop Gain and Phase Shift vs Frequency 15 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) 70 50 0° 40 Closed-Loop Gain (Left Scale) Phase Shift (Right Scale) 30 −10° −20° −30° −40° −50° 20 −60° −70° 10 −80° 0 100 1k 10 k 100 k f − Frequency − Hz Vref + − 39 kΩ Cref 39 kΩ Test Circuit Figure 22. Closed-Loop Gain and Phase Shift vs Frequency 120 TA = − 20°C 110 TA = 25°C Output Sink Current − mA 100 90 TA = 85°C 80 70 60 50 40 30 20 VCC = 3.6 V 10 0 0 5 10 15 Collector Output Saturation Voltage − V 20 Figure 23. Output Sink Current vs Collector Output Saturation Voltage 16 −90° 1M Phase Shift Closed-Loop Gain − dB 60 VCC = 5 V Cref = 470 pF TA = 25°C TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 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 Vref 0.8 0.7 Maximum Output Voltage Swing (Right Scale) VO(ref) −0.05 0.6 0.5 VO(ref) −0.06 VOM − Maximum Output Voltage Swing − V VOM − Maximum Output Voltage Swing − V TYPICAL CHARACTERISTICS (continued) 33 kΩ + 33 kΩ − RL 100 kΩ Vvom − 1 VCC = 3.6 V RL = 100 kΩ VOM+1 = 1.25 V VOM −1 = 1.15 V (Right Scale) VOM −1 = 1.35 V (Left Scale) TEST CIRCUIT VO(ref) −0.07 −25 0 25 50 75 TA − Free-Air Temperature − °C 100 Figure 24. Maximum Output Voltage Swing vs Free-Air Temperature VCC = 3.6 V RT = 10kΩ CT = 330 pF Output Transistor On Duty Cycle − % 10 20 30 40 50 60 70 80 90 100 IICC CC (Standby) − Standby Current − mA 0 TA = 25°C 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 0 0.5 1 1.5 2 2.5 3 3.5 Dead-Time Input Voltage − V Figure 25. Output Transistor On Duty Cycle vs Dead-Time Input Voltage 4 0 10 20 30 VCC − Supply Voltage − V 40 Figure 26. Standby Current vs Supply Voltage 17 TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 TYPICAL CHARACTERISTICS (continued) I CC − Supply Current − mA ICC 2 1.75 1.5 Average Supply Current VCC = 6 V, RT = 10 kΩ, CT = 330 pF Stand-By Current, VCC = 40 V, No Load 1.25 1 Stand-By Current, VCC = 3.6 V, No Load 0.75 0.5 0.25 0 −25 0 25 50 75 TA − Free-Air Temperature − °C 100 Figure 27. Sandby Current vs Free-Air Temperature 18 Maximum Continuous Power Dissipation − mW 1200 1100 16-Pin N Plastic Dip 1000 Thermal Resistance 125°C/W 900 800 700 600 16-Pin NS Plastic SO 500 400 300 Thermal Resistance 250°C/W 200 100 0 −25 0 25 50 75 TA − Free-Air Temperature – C 100 Figure 28. Maximum Continuous Power Dissipation vs Free-Air Temperature TL1451A-EP DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS www.ti.com SLVS614 – DECEMBER 2005 APPLICATION INFORMATION VCC 220 kΩ 0.47 µF 150 Ω 470 Ω 50 kΩ 33 kΩ L1 330 pF R1 R2 33 kΩ R3 33 kΩ 33 kΩ Step-Up C2 Output R4 C1 500 pF Vref 16 15 14 13 12 11 10 9 TL1451A 1 2 3 4 5 6 7 8 470 Ω 470 Ω R5 C5 220 Ω 500 pF 1 µF L2 R6 470 Ω 33 kΩ 33 kΩ Step-Down C4 Output R7 Figure 29. High-Speed Dual Switching Regulator 19 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TL1451AMDREP ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM V62/06611-01XE ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (1) 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 - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. 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. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry 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. TI 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. 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OTHER QUALIFIED VERSIONS OF TL1451A-EP : TL1451A • Catalog: TL1451A-Q1 • Automotive: • Military: TL1451AM NOTE: Qualified Version Definitions: - TI's standard catalog product • Catalog - Q100 devices qualified for high-reliability automotive applications targeting zero defects • Automotive • Military - QML certified for Military and Defense Applications Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TL1451AMDREP Package Package Pins Type Drawing SOIC D 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 16.4 Pack Materials-Page 1 6.5 B0 (mm) K0 (mm) P1 (mm) 10.3 2.1 8.0 W Pin1 (mm) Quadrant 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TL1451AMDREP SOIC D 16 2500 367.0 367.0 38.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. 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