TEXAS INSTRUMENTS TPS5100 Technical data

CONDITION

TPS5100

TRIPLE-CHANNEL PWM CONTROL CIRCUITS

SLVS169 – JANUARY 2000

IN-2

E/O2

V

CC

OUT2
OUT3
OUT1

GND

SCP

PW PACKAGE

(TOP VIEW)

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

E/O3
IN-3
IN-1
E/O1
C

T/RT

DTC2
DTC1/3
V

REF

D

Low Voltage Operation . . . 2.5 V to 7 V

D

Low Power . . . 3. 5 mA
(f = 500 kHz, Duty = 50%)

D

Internal Undervoltage Lockout Protection

D

Internal Short Circuit Protection

D

Wide Operating Frequency . . . 50 kHz to
1 MHz

D

Internal Precision Reference . . . 1.25 V ±1%
(25°C)

D

On/Off Switch for CH1/3 Pair and Ch2 (see
Function Table)

D

0 to 100% Dead Time Control

D

Totem Pole Output Stage

D

Smal l Package . . . 16 Pin TSSOP

description

The TPS5100 is a triple PWM control circuit, primarily designed to compose the power supply for LCD display .
Each PWM channel has own error amplifier, PWM comparator, dead-time control and output driver. The
trimmed voltage reference, oscillator, undervoltage lockout and short circuit protection are common for all
channels.

This device includes two boost exclusive circuits (ch1,3) and a buck-boost exclusive circuit (ch2). The operating
frequency is set with external resister and capacitor, and dead time is continuously adjustable form 0% to 100%
duty cycle with resistive divider network. Soft start function can be implemented by adding a capacitor to dead
time divider network. Two dead time control inputs are assigned for ch1,3 pair and ch2 individually and each
dead time control input can be used to control on/off operation. TPS5100 can operate from 2.5 V supply voltage
and ch1,3 pair and ch2 operate with reverse phase switching each other to achieve efficient operation in low
power and battery powered system.

The TPS5100 is characterized for operation from –20°C to 85°C.

FUNCTION TABLE

DTC1/3 >. 0.3 V, DTC2 > 0.3 V ON H ON L ON H
DTC1/3 > 0.3 V, DTC2 <. 0.2 V ON H OFF H ON H
DTC1/3 < 0.2 V, DTC2 > 0.3 V OFF L ON L OFF L
DTC1/3 < 0.2 V, DTC2 < 0.2 V OFF L OFF H OFF L

AVAILABLE OPTIONS

T

A

–20°C to 85°C TPS5100PW

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.

OUTPUT

CH-1 CH-2 CH-3

PACKAGE

TSSOP

(PW)

Copyright  2000, Texas Instruments Incorporated

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1

TPS5100
TRIPLE-CHANNEL PWM CONTROL CIRCUITS

SLVS169 – JANUARY 2000

functional block diagram

+
_

+
_

+
–
+

+
_

+
_

–

+

+
_

–

+

+
_

–

+

+
_

+
–
+

–
+
–

–

+

2

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Input threshold voltage

V

Input bias current

nA

Input threshold voltage (DTC1/3) (see Note 3)

f

500 kH

V

Input threshold voltage (DTC2) (see NOte 3)

f

500 kH

V

TPS5100

TRIPLE-CHANNEL PWM CONTROL CIRCUITS

SLVS169 – JANUARY 2000

electrical characteristics over recommended operating free-air temperature range, VCC = 3.3 V
(unless otherwise noted) (see Note 1)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

REF

V

REF(dev)

R

EGIN

R

EGL

I

OS

NOTES: 1. Typical values of all parameters except for V

undervoltage lockout section

V

TH

V

TL

V

hys

NOTE 1: Typical values of all parameters except for V

protection control section

I

SCP

V

T2

V

T3

V

R

V

T5

NOTE 1: Typical values of all parameters except for V

oscillator section

f

OSC

f

dV

f

dT

I

CT/RT

V

OSCH

V

OSCL

NOTE 1: Typical values of all parameters except for V

dead time control section

I

BDT1/3

I

BDT2

V

T1

V

T0(DTC1/3)

V

T100(DTC1/3)

V

T0(DTC2)

V

T100(DTC2)

NOTES: 1: Typical values of all parameters except for V

Reference voltage I
Reference voltage change with T
Input regulation I
Output regulation I
Short-circuit output current V

2. The deviation parameter V
recommended free-air temperature range (–20°C to 85°C).

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Upper threshold voltage TA = 25°C 2.2 2.3 2.4 V
Lower threshold voltage TA = 25°C 2 2.1 2.2 V
Hysteresis (VTH – VTL) TA = 25°C 0.1 0.2 0.3 V

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Input terminal source current –1.4 –2 –2.6 µA

p

Latch reset threshold voltage TA = 25°C 0.8 1.5 V
Threshold voltage 1.20 1.25 1.30 V

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Frequency CT = 130 pF, RT = 7 kΩ 400 500 600 kHz
Frequency change with V
Frequency change with T

Output source current –180 –200 –220 µA
H level output voltage 0.95 1 1.05 V
L level output voltage 0.35 0.40 0.45 V

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

p

Comparator threshold voltage 0.2 0.25 0.3 V

p

p

3. These specifications are not production tested. They are specified as ensured values on circuit design.

CC

A

A

REF(dev)

REF(dev)

is defined as the difference between the maximum and minimum values obtained over the

REF(dev)

REF(dev)

REF(dev)

REF(dev)

= –1 mA, TA = 25°C 1.237 1.250 1.263 V

REF

I

= –1 mA, See Note 2 15 25 mV

REF

= –1 mA, VCC = 2.5 V to 7 V 2 5 mV

REF

= –0.1 mA to –1 mA 1 5 mV

REF

= 0 –2 –10 –30 mA

REF

and fdT are specified at TA = 25°C.

and fdT are specified at TA = 25°C.

CH-1, 3 1.10 1.15 1.20
CH-2 0.20 0.25 0.30

and fdT are specified at TA = 25°C.

VCC = 2.5 V,
CT = 130 pF,

CT = 130 pF, RT = 7 kΩ 5% 10%

and fdT are specified at TA = 25°C.

V
V

Duty = 0%
Duty = 100%
Duty = 0%
Duty = 100%

and fdT are specified at TA = 25°C.

= 0.35 V to 1.05 V 200

DTC1/3

= 0.35 V to 1.05 V ±2 ±20

DTC2

OSC

OSC

TA = 25°C,
RT = 7 kΩ

=

=

0.3 0.4 0.5

z

0.9 1 1.1

0.3 0.4 0.5

z

0.9 1 1.1

1% 2%

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TPS5100

IIBInput bias current

nA

VIRInput voltage range

V

Output voltage swing

V

V

V

VT4Input bias voltage

mV

VOHHigh-level output voltage

V

VOLLow-level output voltage

V

TRIPLE-CHANNEL PWM CONTROL CIRCUITS

SLVS169 – JANUARY 2000

electrical characteristics over recommended operating free-air temperature range, VCC = 3.3 V
(unless otherwise noted) (see Note 1) (continued)

error amplifier section

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

IO

A

VD

B

1

V

OM+

V

OM–

I

OM+

I

OM–

NOTE 1: Typical values of all parameters except for V

output section

t

r

t

f

NOTE 1: Typical values of all parameters except for V

total device

I

CC

I

CCA

NOTE 1: Typical values of all parameters except for V

Input offset voltage CH1, 3, Av = 1 15 mV

p

p

Open-loop voltage amplification RFB = 200 kΩ 60 dB
Unity-gain bandwidth 1 MHz

p

Output sink current VID = 0.1 V, VO = 0.2 V 0.2 1 mA
Output source current VID = 0.1 V, VO = 1.2 V –60 –100 µA

p

REF(dev)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

p

p

Rise time CL = 1000 pF 130 ns
Fall time IO = 1000 pF 50 ns

REF(dev)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Supply current Output OFF state 2.5 4 mA
Average supply current F

REF(dev)

CH1, 3, VI = –.95 V to 1.55 V ±10 ±20
CH2, VI = 0.4 V to 1 V ±10 ±20
CH1, 3, 0.95 1.55
CH2 0.4 1

= 0.1

ID

CH2, AV = 1, TA = 25°C 678 700 722
CH2, AV = 1 665 700 735

and fdT are specified at TA = 25°C.

and fdT are specified at TA = 25°C.

= 500 kHz, Duty = 50%, No load 3.5 5 mA

OSC

and fdT are specified at TA = 25°C.

IO = 60 µA 1.2
IO = 0.2 mA 0.2

IO = 20 mA (CH2) 2.9 3.05
IO = –40 mA (CH1, 3) 1.9 2.2 2.6
IO = 20 mA (CH1, 3) 0.2 0.4
IO = 40 mA (CH2) 0.2 0.3 0.6

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TPS5100

TRIPLE-CHANNEL PWM CONTROL CIRCUITS

SLVS169 – JANUARY 2000

TYPICAL CHARACTERISTICS

REFERENCE VOLTAGE

vs

FREE-AIR TEMPERATURE

1.27
VCC = 3.3 V
IO = –1 mA

1.26

1.25

1.24

– Reference Voltage – V

ref

V

1.23

1.22

–50 0 100 150

TA – Free-Air Temperature – °C

50

Figure 1

SUPPLY CURRENT

vs

FREE-AIR TEMPERATURE

5

VCC = 3.3 V

INPUT THRESHOLD VOLTAGE (UVLO)

vs

FREE-AIR TEMPERATURE

2.5
VCC = 3.3 V

2.4

2.3

2.2

2.1

– Input Threshold Voltage (UVLO) – V

IT

V

2

–50 0 100 150

TA – Free-Air Temperature – °C

50

Figure 2

SOURCE CURRENT

vs

FREE-AIR TEMPERATURE

–1.8

VCC = 3.3 V

4

I

CC

3

I

CCA

2

– Supply Current – mA

CC

I

1

0

–50 0 100 150

TA – Free-Air Temperature – °C

50

Figure 3

–2

Aµ

–2.2

S

I – Source Current –

–2.4

–2.6

–50 0 100 150

TA – Free-Air Temperature – °C

50

Figure 4

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