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SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Complete PWM Power-Control Function

D Totem-Pole Outputs for 200-mA Sink or

Source Current

D Output Control Selects Parallel or

Push-Pull Operation

D Internal Circuitry Prohibits Double Pulse at

Either Output

D Variable Dead-Time Provides Control Over

Total Range

D Internal Regulator Provides a Stable 5-V

Reference Supply, Trimmed to 1%

Tolerance

D On-Board Output Current-Limiting

Protection

D Undervoltage Lockout for Low-V

Conditions

D Separate Power and Signal Grounds

description/ordering information

The TL598 incorporates all the functions required in the construction of pulse-width-modulated (PWM)

controlled systems on a single chip. Designed primarily for power-supply control, the TL598 provides the

systems engineer with the flexibility to tailor the power-supply control circuits to a specific application.

The TL598 contains two error amplifiers, an internal oscillator (externally adjustable), a dead-time control (DTC)

comparator, a pulse-steering flip-flop, a 5-V precision reference, undervoltage lockout control, and output

control circuits. Two totem-pole outputs provide exceptional rise- and fall-time performance for power FET

control. The outputs share a common source supply and common power ground terminals, which allow system

designers to eliminate errors caused by high current-induced voltage drops and common-mode noise.

The error amplifier has a common-mode voltage range of 0 V to V

− 2 V. The DTC comparator has a fixed

offset that prevents overlap of the outputs during push-pull operation. A synchronous multiple supply operation

can be achieved by connecting RT to the reference output and providing a sawtooth input to CT.

The TL598 device provides an output control function to select either push-pull or parallel operation. Circuit

architecture prevents either output from being pulsed twice during push-pull operation. The output frequency

for push-pull applications is one-half the oscillator frequency

2RTCT

. For single-ended applications:

RT CT

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP (N) Tube of 25 TL598CN TL598CN

0°C to 70°C

SOIC (D)

Tube of 40 TL598CD

TL598C

0 C to 70 C

SOIC (D)

Reel of 2500 TL598CDR

TL598C

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

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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.

1IN+

1IN−

FEEDBACK

DTC

SIGNAL GND

OUT1

2IN+

2IN−

REF

OUTPUT CTRL

POWER GND

OUT2

D OR N PACKAGE

(TOP VIEW)

ERROR

AMP 1

ERROR

AMP 2

Summary of content (17 pages)

PAGE 1
SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 D Complete PWM Power-Control Function D Totem-Pole Outputs for 200-mA Sink or D OR N PACKAGE (TOP VIEW) Source Current ERROR AMP 1 D Output Control Selects Parallel or D D D D D D Push-Pull Operation Internal Circuitry Prohibits Double Pulse at Either Output Variable Dead-Time Provides Control Over Total Range Internal Regulator Provides a Stable 5-V Reference Supply, Trimmed to 1% Tolerance On-Board Output
PAGE 2
SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 FUNCTION TABLE INPUT/OUTPUT CTRL VI = GND VI = REF OUTPUT FUNCTION Single-ended or parallel output Normal push-pull operation functional block diagram OUTPUT CTRL (see Function Table) 13 RT CT DTC 6 5 Oscillator ≈0.
PAGE 3
SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 recommended operating conditions MIN MAX VCC VI Supply voltage 7 40 V Amplifier input voltage 0 V IO IIL Collector voltage VCC−2 40 Output current (each output), sink or source Current into feedback terminal UNIT V 200 mA 0.3 mA 0.00047 10 µF 1.
PAGE 4
SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (unless otherwise noted) (continued) error amplifier section (see Note 4) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT Input offset voltage FEEDBACK = 2.5 V 2 10 mV Input offset current FEEDBACK = 2.5 V 25 250 nA Input bias current FEEDBACK = 2.5 V 0.
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SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (unless otherwise noted) (continued) dead-time control section (see Figure 1) (see Note 4) PARAMETER TEST CONDITIONS Input bias current (DTC) VI = 0 to 5.25 V DTC = 0 V Maximum duty cycle, each output MIN Maximum duty cycle MAX UNIT −2 −10 µA 3 3.3 0.
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SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 PARAMETER MEASUREMENT INFORMATION Output VC 15 V 1 2 Test Inputs 3 4 5 6 12 VCC IN+ IN− ERROR AMP 1 IN+ ERROR AMP 2 IN− 15 50 kΩ FEEDBACK DTC REF CT OUTPUT CTRL RT VC 0.001 µF OUT1 12 kΩ 7 16 OUT2 SIGNAL GND POWER GND POWER GND 14 13 11 8 9 OUTPUT CONFIGURATION 15 V OUTPUT 1 OUTPUT 2 − VI + FEEDBACK 10 REF − + MAIN DEVICE TEST CIRCUIT ERROR-AMPLIFIER TEST CIRCUIT Figure 1.
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SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 TYPICAL CHARACTERISTICS OSCILLATOR FREQUENCY AND FREQUENCY VARIATION † vs TIMING RESISTANCE AMPLIFIER VOLTAGE AMPLIFICATION vs FREQUENCY 80 100 k VCC = 15 V VCC = 15 V ∆VO = 3 V TA = 25°C Amplifier Voltage Amplification − dB fosc − Oscillator Frequency − Hz 40 k −2% 10 k 4k 0.001 µF −1% 0.01 µF 0% 0.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 23-Apr-2007 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device TL598CDR Package Package Pins Type Drawing SOIC D 16 SPQ Reel Reel Diameter Width (mm) W1 (mm) 2500 330.0 16.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) 6.5 10.3 2.1 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TL598CDR SOIC D 16 2500 333.2 345.9 28.
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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 JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.