TEXAS INSTRUMENTS TL1453C Technical data

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TL1453C

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990

D

Complete PWM Power Control Circuitry

D

Completely Synchronized Operation

D

Internal Undervoltage Lockout Protection

D

Wide Supply Voltage Range

D

Oscillator Frequency...500 kHz Max

D

Variable Dead Time Provides Control
Over Total Range

D

Internal Regulator Provides a Stable 2.5-V
Reference Supply

ERROR IN+

AMPLIFIER 1 IN–

1 FEEDBACK

1 DEAD-TIME CONTROL

1 OUTPUT

N OR NS PACKAGE

(T0P VIEW)

1

C

T

2

R

T

GND

3
4
5
6
7
8

{

REF

16

SCP

15

IN+ ERROR

14
13
12
11
10

}

IN– AMPLIFIER 2
2 FEEDBACK
2 DEAD-TIME CONTRO
2 OUTPUT
V

9

CC

description

The TL1453C incorporates the functions required in the construction of two pulse-width-modulation control
circuits on a single monolithic chip. Designed primarily for power supply control, the TL1453C 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 1.05 V to 1.45 V . The dead-time control comparator has
no offset unless externally altered and may be used to provide 0% to 100% dead time. The on-chip oscillator
may be operated by terminating R
control circuit feature inhibits the output until the internal circuitry is operational.

The TL1453C is characterized for operation from –20°C to 85°C.

(pin 2) and CT (pin 1). During low-VCC conditions, the undervoltage lockout

T

functional block diagram

V

= 2.5 V

ref

16

REF

Error Amp.1

3

1 IN+

4

1 IN–

2 IN+

2 IN–

SCP

5
12
14

13

15

Error Amp.2

1 FEEDBACK
2 FEEDBACK

†

UVLO = Undervoltage Lockout Protection

V

CC

9

Reference

Voltage

2.5 V

C

R

T

T

12

Triangle

Oscillator

2 V

1.4 V

2.5 V

2.5 V

†

UVLO

1 DEAD-TIME CONTROL 2 DEAD-TIME CONTROL

PWM Comparator 1

1

2

PWM Comparator 2

116

8

GND

7

10

1 OUTPUT

2 OUTPUT

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1990, Texas Instruments Incorporated

1

TL1453C

Output voltage change with temperature

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, V

(see Note 1) 41 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

Amplifier input voltage 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Collector output voltage 51 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Collector output current 21 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

–20°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NOTE 1: All voltage values are with respect to network ground terminal.

DISSIPATION RATING TABLE

PACKAGE

N 1000 mW 8 mW/°C 520 mW

NS 725 mW 5.8 mW/°C 397 mW

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 85°C

POWER RATING

recommended operating conditions

MIN MAX UNIT

Supply voltage, V
Amplifier input voltage, V
Collector output voltage, V
Collector output current 20 mA
Current into feedback terminal 45 µA
Feedback resistor, R
Timing capacitor , C
Timing resistor , R
Oscillator frequency 1 500 kHz
Operating free-air temperature, T

CC

I

O

F

T

T

A

3.6 40 V

1.05 1.45 V
50 V

100 kΩ
150 15000 pF

5.1 100 kΩ

–20 85 °C

electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
f = 200 kHz (unless otherwise noted)

reference section

Output voltage (pin 16) IO = 1 mA 2.4 2.5 2.6 V

p

Input regulation VCC = 3.6 V to 40 V 2 12.5 mV
Output regulation IO = 0.1 mA to 1 mA 1 7.5 mV
Short-circuit output current VO = 0 3 10 30 mA

†

All typical values are at TA = 25°C.

2

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

p

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TA = –20°C to 25°C –0.1% ±1%
TA = 25°C to 85°C –0.2% ±1%

Frequency change with tem erature

I

10kHz (pi

11)

V

1.05

gg

CC

Collector off-state current

A

TL1453C

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A – FEBRUARY 1990 – REVISED DECEMBER 1990

electrical characteristics over recommended operating free-air temperature range, VCC = 6 V,
f = 200 kHz (unless otherwise noted) (continued)

undervoltage lockout section

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Upper threshold voltage (pin 9) I
Lower threshold voltage (pin 9) I
Hysteresis (pin 9) I

oscillator section

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Frequency CT = 330 pF, RT = 10 kΩ 200 kHz
Standard deviation of frequency VCC, TA, RT, CT values are constant 10%
Frequency change with voltage VCC = 3.6 V to 40 V 1%

p

TA = –20°C to 25°C –0.4% ±2%
TA = 25°C to 85°C –0.2% ±2%

dead-time control section

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Input bias current (pins 6 and 11) 1 µA

nput threshold voltage at f =

ns 6 and

= 0.1 mA, TA = 25°C 2.72 V

Oref

= 0.1 mA, TA = 25°C 2.6 V

Oref

= 0.1 mA, TA = 25°C 80 120 mV

Oref

Zero duty cycle 2.05 2.25
Maximum duty cycle 1.2 1.45

error-amplifier section

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Input offset voltage VO (pins 5 and 12) = 1.25 V ±6 mV
Input offset current VO (pins 5 and 12) = 1.25 V ±100 nA
Input bias current VO (pins 5 and 12) = 1.25 V 160 500 nA

Common-mode input voltage range VCC = 3.6 V to 40 V

Open-loop voltage amplification RF = 200 kΩ 70 80 dB
Unity-gain bandwidth 1.5 MHz
Common-mode rejection ratio 60 80 dB
Positive output voltage swing V

Negative output voltage swing 1 V
Output (sink) current (pins 5 and 12) VID = –0.1 V, VO = 1.25 V 0.5 1.6 mA

Output (source) current (pins 5 and 12)

VID = 0.1 V, VO = 1.25 V

1.05
to

1.45

–0.1 V

ref

–45 –70 µA

output section

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

VCC = 0, VO = 50 V 10

VO = 50 V 10
Output saturation voltage IO = 10 mA 1.2 2 V
Short-circuit output current VO = 6 V 90 mA

†

All typical values are at TA = 25°C.

V

µ

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3