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Part: 5962-9166801QEA
Category:
Power Management
-> PWM Power Supply
-> Voltage Mode
Description: ti TL598, Pulse-width-modulation (Pwm) Control Circuit
Company: Texas Instruments, Inc.
Datasheet: Download 5962-9166801QEA datasheet File size : 456 kB
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Datasheet text preview:
P
TL598 S PULSE WIDTH MODULATION CONTROL CIRCUITS
LVS053D - FEBRUARY 1988 - REVISED NOVEMBER 2003
D Complete PWM Power-Control Function D Totem-Pole Outputs for 200-mA Sink or
Source Current
D OR N PACKAGE (TOP VIEW) ERROR AMP 1 1IN+ 1IN- DTC CT RT SIGNAL GND OUT1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 2IN+ 2IN- REF OUTPUT CTRL VCC VC POWER GND OUT2 ERROR AMP 2
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 Current-Limiting Protection Undervoltage Lockout for Low-VCC Conditions Separate Power and Signal Grounds
FEEDBACK
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 VCC - 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 1 For single-ended applications: for push-pull applications is one-half the oscillator frequency O + 2 RT CT fO + 1 . RT CT
f
.
ORDERING INFORMATION
TA PDIP (N) 0°C to 70 C 70°C SOIC (D) PACKAGE Tube of 25 Tube of 40 Reel of 2500 ORDERABLE PART NUMBER TL598CN TL598CD TL598CDR TOP-SIDE MARKING TL598CN TL598C
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. lease 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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
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TL598 S PULSE WIDTH MODULATION CONTROL CIRCUITS
LVS053D - 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 6 5 0.1 V 4 Error Amplifier 1IN+ 1IN- 2IN+ 2IN- FEEDBACK 1 2 16 15 3 Reference Regulator + - 1 Oscillator DTC Comparator C1 PWM Comparator 9 Pulse-Steering Flip-Flop OUT2 1D 11 8 VC OUT1
DTC
Error Amplifier + 2 -
Undervoltage Lockout Control
10 POWER GND 12 V CC
14
REF 7 SIGNAL GND
0.7 mA
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 V Amplifier input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.3 V Collector voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 V Output current (each output), sink or source, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mA Package thermal impedance, JA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to 150°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. NOTES: 1. All voltage values, except differential voltages, are with respect to the signal ground terminal. 2. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) - TA)/JA. Operating at the absolute maximum TJ of 150°C can impact reliability. 3. The package thermal impedance is calculated in accordance with JESD 51-7.
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POST OFFICE BOX 655303
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TL598 S PULSE WIDTH MODULATION CONTROL CIRCUITS
LVS053D - FEBRUARY 1988 - REVISED NOVEMBER 2003
recommended operating conditions
MIN VCC VI IO IIL CT RT fosc TA Supply voltage Amplifier input voltage Collector voltage Output current (each output), sink or source Current into feedback terminal Timing capacitor Timing resistor Oscillator frequency Operating free-air temperature 0.00047 1.8 1 0 7 0 MAX 40 VCC-2 40 200 0.3 10 500 300 70 UNIT V V V mA mA µF k kHz °C
electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (unless otherwise noted)
reference section (see Note 4)
PARAMETER Output voltage (REF) Input regulation Output regulation Output voltage change with temperature Short-circuit output current§ IO = 1 mA VCC = 7 V to 40 V IO = 1 mA to 10 mA TA = MIN to MAX TEST CONDITIONS TA = 25°C TA = full range TA = 25°C TA = 25°C TA = full range 2 MIN 4.95 4.9 2 1 TYP 5 MAX 5.05 5.1 25 15 50 10 mV mV/V V mV UNIT
REF = 0 V -10 -48 mA Full range is 0°C to 70°C. All typical values, except for parameter changes with temperature, are at TA = 25°C. § Duration of the short circuit should not exceed one second. NOTE 4: Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
oscillator section, CT = 0.001 µF, RT = 12 k (see Figure 1) (see Note 4)
PARAMETER Frequency Standard deviation of frequency¶ Frequency change with voltage Frequency change with temperature# All values of VCC, CT, RT, TA constant VCC = 7 V to 40 V, TA = full range TA = full range, TA = 25°C CT = 0.01 µF TEST CONDITIONS MIN TYP 100 100 1 70 50 10 120 80 MAX UNIT kHz Hz/kHz Hz/kHz Hz/kHz
Full range is 0°C to 70°C. All typical values, except for parameter changes with temperature, are at TA = 25°C. ¶ Standard deviation is a measure of the statistical distribution about the mean, as derived from the formula:
s+
n+1 N*1
N
(x n * X) 2
# Effects of temperature on external RT and CT are not taken into account. NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
POST OFFICE BOX 655303
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3
TL598 S PULSE WIDTH MODULATION CONTROL CIRCUITS
LVS053D - 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 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 Output sink current (FEEDBACK) Output source current (FEEDBACK) Phase margin at unity gain VCC = 40 V, FEEDBACK = 0.5 V FEEDBACK = 3.5 V FEEDBACK = 0.5 V to 3.5 V, RL = 2 k VIC = 6.5 V, TA = 25°C 65 0.3 -2 65° FEEDBACK = 2.5 V FEEDBACK = 2.5 V FEEDBACK = 2.5 V VCC = 7 V to 40 V VO (FEEDBACK) = 3 V, VO (FEEDBACK) = 0.5 V to 3.5 V 0 to VCC-2 70 95 800 80 0.7 TEST CONDITIONS MIN TYP 2 25 0.2 MAX 10 250 1 UNIT mV nA µA V dB kHz dB mA mA
Supply-voltage rejection ratio FEEDBACK = 2.5 V, VCC = 33 V, RL = 2 k 100 dB All typical values, except for parameter changes with temperature, are at TA = 25°C. NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (unless otherwise noted)
undervoltage lockout section (see Note 4)
PARAMETER Threshold voltage Hysteresis§ TEST CONDITIONS TA = 25°C TA = full range TA = 25°C TA = full range MIN 4 3.5 100 50 MAX 6 6.9 V mV UNIT
Full range is 0°C to 70°C. § Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage. NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
output section (see Note 4)
PARAMETER High-level output voltage Low-level output voltage Output-control input current TEST CONDITIONS VCC = 15 V, VC = 15 V VCC = 15 V, VC = 15 V VI = Vref VI = 0.4 V IO = -200 mA IO = -20 mA IO = 200 mA IO = 20 mA MIN 12 13 2 0.4 3.5 100 V mA µA V MAX UNIT
NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
TL598 S PULSE WIDTH MODULATION CONTROL CIRCUITS
LVS053D - 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 Input bias current (DTC) Maximum duty cycle, each output Input threshold voltage (DTC) TEST CONDITIONS VI = 0 to 5.25 V DTC = 0 V Zero duty cycle Maximum duty cycle 0 MIN 0.45 3 3.3 V TYP -2 MAX -10 UNIT µA
All typical values, except for parameter changes with temperature, are at TA = 25°C. NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
pwm comparator section (see Note 4)
PARAMETER Input threshold voltage (FEEDBACK) DTC = 0 V TEST CONDITIONS MIN TYP 3.75 MAX 4.5 UNIT V
Input sink current (FEEDBACK) V(FEEDBACK) = 0.5 V 0.3 0.7 mA All typical values, except for parameter changes with temperature, are at TA = 25°C. NOTE Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
total device (see Figure 1) (see Note 4)
PARAMETER Standby supply current TEST CONDITIONS RT = Vref, All other inputs and outputs open VCC = 15 V VCC = 40 V MIN TYP 15 20 MAX 21 26 mA UNIT
Average supply current DTC = 2 V 15 mA All typical values, except for parameter changes with temperature, are at TA = 25°C. NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
switching characteristics, TA = 25°C (see Note 4)
PARAMETER Output-voltage rise time Output-voltage fall time CL = 1500 pF, See Figure 2 TEST CONDITIONS VC = 15 V, VCC = 15 V, MIN TYP 60 35 MAX 150 75 UNIT ns
NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
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