TEXAS INSTRUMENTS TL1464I Technical data

V

≥ 2.4 V

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D

High-Speed Drive Controller for PNP Power
Transistor

D

Internal-Regulator Provides a Stable 1.5 V
Reference Supply

D

Low Start-Up Voltage 3.1 V

description

The TL1464I incorporates on a single monolithic chip all the functions required in the construction of a
pulse-width-modulation control circuit. Designed primarily for power supply control, the TL1464I contains an
on-chip 1.5 V regulator, four error amplifiers, an oscillator, two dead-time comparators, undervoltage lockout
circuitry, short circuit protection, standby control circuitry, and output circuits.

The external speed-up capacitors provide exceptional rise and fall time performance for the PNP power
transistor.

The TL1464I operates from 3.1 V supply voltage and 2 pair of four-outputs (CH-1/CH-3, CH-2/CH-4 the same
period) at the inverse phase of each other. As a result, the TL1464I provides high-efficiency power supply.

STANDBY STANDBY-2 TO4 VREF OUTPUT-1 OUTPUT-2 OUTPUT-3 OUTPUT-4

VI ≤ 0.4 V VI ≤ 0.4 V, VI ≥ 2.4 V L OFF OFF OFF OFF

I

NOTE: When the STANDBY input is high (≥ 2.4 V), OUTPUT-2 to 4 are controlled individually. If STANDBY-2 input is low

(≤ 0.4 V), OUTPUT-2 is turned off. When CH-2 standby mode is released, CH-2 can do the soft-start function.

QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT

D

Internal Short-Circuit Protection

D

Internal Undervoltage Lockout Protection

D

Internal Shut-Down Circuit by Channel

D

Controllable Base Current of External
Transistor

FUNCTION TABLE

INPUTS

VI ≥ 2.4 V H ON ON ON ON
VI ≥ 0.4 V H ON See Note See Note See Note

OUTPUT FUNCTIONS

TL1464I

SLVS266 – FEBRUAR Y 2000

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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  2000, Texas Instruments Incorporated

1

TL1464I
QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS266 – FEBRUAR Y 2000

PT PACKAGE

(TOP VIEW)

CC-2

CC-3

OUTPUT V

OUTPUT-2

OUTPUT GND-3,4

OUTPUT BIAS-3

BOOT CAP.H-3

BOOT CAP.L-3

OUTPUT-3

OUTPUT V

BOOT CAP.L-2

BOOT CAP.H-2

OUTPUT BIAS-2

OUTPUT GND-1,2

OUTPUT V

CC-4

OUTPUT-4

BOOT CAP.L-4

BOOT CAP.H-4

OUTPUT BIAS -4

NONINV INPUT-4

INV INPUT-4

FEEDBACK-4

NONINV INPUT-3

INV INPUT-3

FEEDBACK-3

V

CC

47 46 45 44 4348 42

1
2
3
4
5
6
7
8
9
10
11
12

14 15

13

T

T

C

R

16

17 18 19 20

SCP

VREF

GND

STANDBY-4

40 39 3841

21 22 23 24

STANDBY-3

STANDBY-2

37

STANDBY

INV INPUT-2

FEEDBACK-2

NONINV INPUT-2

OUTPUT V

36
35

OUTPUT-1

34

BOOT CAP.L-1

33

BOOT CAP.H-1

32

OUTPUT BIAS-1
DTC-1

31

OUTPUT MONITOR-1

30

NONINV INPUT-1

29

INV INPUT-1

28
27

FEEDBACK-1
DTC-2

26

OUTPUT MONITOR-2

25

CC–1

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

DCT1

TL1464I

QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS266 – FEBRUAR Y 2000

BC_H1
BC_L1
OUTVCC1

FB1

INV1

NON1

OM1

DCT2

FB2

INV2

NON2

OM2

FB3

INV3

NON3

ERR AMP1

–

+

–

+

ERR AMP2

–

+

–

+

ERR AMP3

–

+

–

+

SCP

SCP

SCP

COMP1
+

+

–

COMP2

+
+

–

COMP3

+

–

OUT1
BIAS1

GND12

BC_H2
BC_L2
OUTVCC1

OUT2
BIAS2

BC_H3
BC_L3
OUTVCC3

OUT3
BIAS3

GND34

FB4

INV4

NON4

CT
RT

VREF

STANDBY

VCC

ERR AMP4

–

+

–

+

OSC

Voltage

REF

SCP

COMP4

+

–

Standby

Logic

STANDBY3

STANDBY2STANDBY1

Standby

+

–

U.V.L.O.

Logic

SCP
Comp

BC_H4
BC_L4
OUTVCC4

OUT4
BIAS4

SCP
GND

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TL1464I

I/O

DESCRIPTION

Boot-strap capacitor connect pin (CH-1)

Boot-strap capacitor connect pin (CH-2)

Boot-strap capacitor connect pin (CH-3)

Boot-strap capacitor connect pin (CH-4)

QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS266 – FEBRUAR Y 2000

Terminal Functions

TERMINAL

NAME NO.

BOOT CAP.H-1 33
BOOT CAP.L-1 34
BOOT CAP.H-2 39
BOOT CAP.L-2 40
BOOT CAP.H-3 46
BOOT CAP.L-3 45
BOOT CAP.H-4 4
BOOT CAP.L-4 3
C

T

DTC-1 31 Dead-time control input pin (CH-1)
DTC-2 26 Dead-time control input pin (CH-2)
FEEDBACK-1 27 Error amplifier output pin (CH-1)
FEEDBACK-2 22 Error amplifier output pin (CH-2)
FEEDBACK-3 11 Error amplifier output pin (CH-3)
FEEDBACK-4 8 Error amplifier output pin (CH-4)
GND 17 Ground pin
INV INPUT-1 28 Error amplifier inverting input pin (CH-1)
INV INPUT-2 23 Error amplifier inverting input pin (CH-2)
INV INPUT-3 10 Error amplifier inverting input pin (CH-3)
INV INPUT-4 7 Error amplifier inverting input pin (CH-4)
NONINV INPUT-1 29 Error amplifier noninverting input pin (CH-1)
NONINV INPUT-2 24 Error amplifier noninverting input pin (CH-2)
NONINV INPUT-3 9 Error amplifier noninverting input pin (CH-3)
NONINV INPUT-4 6 Error amplifier noninverting input pin (CH-4)
OUTPUT-1 35 Output pin (CH-1)
OUTPUT-2 41 Output pin (CH-2)
OUTPUT-3 44 Output pin (CH-3)
OUTPUT-4 2 Output pin (CH-4)
OUTPUT BIAS-1 32 Output ON current setup pin (CH-1)
OUTPUT BIAS-2 38 Output ON current setup pin (CH-2)
OUTPUT BIAS-3 47 Output ON current setup pin (CH-3)
OUTPUT BIAS-4 5 Output ON current setup pin (CH-4)
OUTPUT GND-1,2 37 Output ground pin (CH-1,2)
OUTPUT GND-3,4 48 Output ground pin (CH-3,4)
OUTPUT MONITOR-1 30 Output monitor comparator input pin (CH-1)
OUTPUT MONITOR-2 25 Output monitor comparator input pin (CH-2)
OUTPUT V
OUTPUT V
OUTPUT V
OUTPUT V
R

T

SCP 15 Short-circuit protection capacitor connect pin

CC-1
CC-2
CC-3
CC-4

14 Timing capacitor connect pin

36 Output supply pin (CH-1)
42 Output supply pin (CH-2)
43 Output supply pin (CH-3)

1 Output supply pin (CH-4)

13 Timing resistor connect pin

p

p

p

p

p

p

p

p

p

p

p

p

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265