Datasheet

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FEATURES

OUT

COMP

GND

DTC

SCP

D PACKAGE

(TOP VIEW)

DESCRIPTION

TL5001A-Q1

www.ti.com

.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009

PULSE-WIDTH-MODULATION CONTROL CIRCUITS

• Qualified for Automotive Applications

• Complete PWM Power Control

• 3.6-V to 40-V Operation

• Internal Undervoltage-Lockout Circuit

• Internal Short-Circuit Protection

• Oscillator Frequency: 20 kHz to 500 kHz

• Variable Dead Time Provides Control Over

Total Range

• ± 3% Tolerance on Reference Voltage

• Available in Q-Temperature Automotive

– High-Reliability Automotive Applications

– Configuration Control / Print Support

– Qualification to Automotive Standards

The TL5001A incorporates on a single monolithic chip all the functions required for a pulse-width-modulation

(PWM) control circuit. Designed primarily for power-supply control, the TL5001A contains an error amplifier, a

regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO),

short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical reference

voltage tolerance of ± 3%.

The error-amplifier common-mode voltage ranges from 0 V to 1.5 V. The noninverting input of the error amplifier

is connected to a 1-V reference. Dead-time control (DTC) can be set to provide 0% to 100% dead time by

connecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with an

external resistor to GND. During low V

conditions, the UVLO circuit turns the output off until V

recovers to its

normal operating range.

The TL5001A is characterized for operation from – 40 ° C to 125 ° C.

AVAILABLE OPTIONS

(1)

PACKAGED DEVICES

(2)

SMALL OUTLINE

(D)

(3)

– 40 ° C to 125 ° C TL5001AQDRQ1

(1) For the most current package and ordering information, see the

Package Option Addendum at the end of this document, or see the

TI web site at www.ti.com .

(2) Package drawings, thermal data, and symbolization are available at

www.ti.com/packaging .

(3) The D package is available taped and reeled. Add the suffix R to the

device type (e.g., TL5001ADR).

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.

Summary of content (17 pages)

PAGE 1
TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 PULSE-WIDTH-MODULATION CONTROL CIRCUITS FEATURES 1 • • • • • • • • • D PACKAGE (TOP VIEW) Qualified for Automotive Applications Complete PWM Power Control 3.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com SCHEMATIC FOR TYPICAL APPLICATION VI + TPS1101 VO + 2 VCC 5 SCP VO COMP 1 3 TL5001A 6 7 DTC FB 4 RT GND 8 FUNCTIONAL BLOCK DIAGRAM VCC 2 DTC 6 RT 7 OUT 1 UVLO IDT 2.5 V 1V 1.
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TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 DETAILED DESCRIPTION VOLTAGE REFERENCE A 2.5-V regulator operating from VCC is used to power the internal circuitry of the TL5001A and as a reference for the error amplifier and SCP circuits.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com Soft start can be implemented by paralleling the DTC resistor with a capacitor (CDT) as shown in Figure 2. During soft start, the voltage at DTC is derived by the following equation: ǒ V DT [ I DTR DT 1 * e * Ǔ t R DTC DT (2) 6 DTC CDT TL5001/A RDT Figure 2.
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TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 The timer operates by charging an external capacitor (CSCP) connected between the SCP terminal and ground, towards 2.5 V through a 185-kΩ resistor (RSCP). The circuit begins charging from an initial voltage of approximately 185 mV and times out when the capacitor voltage reaches 1 V.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.
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TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS TL5001AQ MIN TYP (1) MAX 0.97 1 1.03 0.94 0.98 1.06 2 12.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.
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TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 PARAMETER MEASUREMENT INFORMATION 2.3 V COMP 1.5 V DTC OSC PWM/DTC Comparator OUT SCP Comparator 1 1V SCP SCP Timing Period SCP Comparator 2 VCC A. 0V 3V The waveforms show timing characteristics for an intermittent short circuit and a longer short circuit that is sufficient to activate SCP.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS OSCILLATOR FREQUENCY vs TIMING RESISTANCE fosc − Oscillation Frequency − kHz 100 k 10 k 10 k 2 100 k 96 94 92 90 − 25 25 50 75 100 TA − Ambient Temperature − °C Figure 6.
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TL5001A-Q1 www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 TYPICAL CHARACTERISTICS (continued) AVERAGE SUPPLY CURRENT vs POWER-SUPPLY VOLTAGE AVERAGE SUPPLY CURRENT vs AMBIENT TEMPERATURE 1.3 2 I CC − Average Supply Current − mA I CC − Average Supply Current − mA Rt = 100 kΩ TA = 25 °C 1.5 1 0.5 10 20 30 40 1.1 1 0.9 0.
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TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS (continued) ERROR AMPLIFIER OUTPUT VOLTAGE vs OUTPUT (SOURCE) CURRENT ERROR AMPLIFIER OUTPUT VOLTAGE vs AMBIENT TEMPERATURE 2.46 VCC = 6 V VI(FB) = 0.8 V TA = 25 °C 2 1.5 1 0.5 0 0 20 40 60 80 100 IO − Output (Source) Current − µA 2.43 2.42 2.
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TL5001A-Q1 www.ti.com ..............................................................................................................................................
PAGE 14
TL5001A-Q1 SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com APPLICATION INFORMATION VI 5V C1 100 µF 10 V R1 470 Ω + Q1 TPS1101 GND L1 20 µH 3.3 V C3 0.1 µF CR1 MBRS140T3 C2 100 µF 10 V 2 C4 1 µF + VCC 5 SCP VO C5 0.1 µF R2 56 kΩ R3 43 kΩ COMP 1 7 GND 3 U1 TL5001A 6 + R5 7.50 kΩ 1% C6 0.012 µF DTC C7 0.0047 µF R4 5.1 kΩ FB R7 2.
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.com 26-Mar-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TL5001AQDRG4Q1 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL5001AQDRQ1 ACTIVE SOIC D 8 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.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.