TEXAS INSTRUMENTS TLC5940 Technical data

PWP RHB NT

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Delay

x0

12−Bit Grayscale

PWM Control

DC Register

GS Register

DC EEPROM

Constant Current

Driver

LED Open Detection

Temperature

Error Flag

(TEF)

Max. OUTn

Current

Delay

x1

12−Bit Grayscale

PWM Control

DC Register

GS Register

DC EEPROM

Constant Current

Driver

LED Open Detection

Delay

x15

6−Bit Dot

12−Bit Grayscale

PWM Control

DC Register

GS Register

DC EEPROM

Constant Current

Driver

LED Open Detection

OUT0

OUT1

OUT15

SOUT

SINSCLK

IREF

XERR

XLAT

GSCLK

BLANK

DCPRG

DCPRG

DCPRG

VPRG

VPRG

VPRG

GNDVCC

VPRG

Input

Shift

Register

Input
Shift

Register

VPRG

110

2312

191180

9590

116

5

VPRG

0

0

95

96

191

LED Open

Detection

(LOD)

5

9590

6 11

DCPRG

0

192

96

0

1

01 0

1

01

GS Counter

CNT

CNT

CNT

CNT

96

96

Status

Information:

LOD,

TED,

DC DATA

192

0

191

1
0

0

1

V

REF

=1.24 V

Correction

6−Bit Dot
Correction

6−Bit Dot
Correction

01

Blank

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

16 CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL

FEATURES APPLICATIONS

• 16 Channels

• 12 bit (4096 Steps) Grayscale PWM Control

• Dot Correction

– 6 bit (64 Steps)
– Storable in Integrated EEPROM

• Drive Capability (Constant Current Sink)

– 0 mA to 60 mA (V
– 0 mA to 120 mA (V

< 3.6 V)

CC

> 3.6 V)

CC

• LED Power Supply Voltage up to 17 V

• V

= 3 V to 5.5 V

CC

• Serial Data Interface, SPI comp.

• Controlled In-Rush Current

• 30-MHz Data Transfer Rate

• CMOS Level I/O

• Error Information

– LOD: LED Open Detection
– TEF: Thermal Error Flag

• Monocolor, Multicolor, Fullcolor LED Displays

• LED Signboards

• Display Backlighting

• General, High-Current LED Drive

DESCRIPTION

The TLC5940 is a 16-channel constant-current sink
LED driver. Each channel has an individually adjust­able 4096-step grayscale PWM brightness control
and a 64-step constant-current sink (dot correction).
The dot correction adjusts the brightness variations
between LED channels and other LED drivers. The
dot correction data is stored in an integrated
EEPROM. Both grayscale control and dot correction
are accessible via a serial interface. A single external
resistor sets the maximum current value of all 16
channels.

The TLC5940 features two error information circuits.
The LED open detection (LOD) indicates a broken or
disconnected LED at an output terminal. The thermal
error flag (TEF) indicates an overtemperature con­dition.

TLC5940

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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.

Copyright © 2004–2005, Texas Instruments Incorporated

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TLC5940

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

T

A

PACKAGE

-40 ° C to 85 ° C 28-pin HTSSOP PowerPAD™ TLC5940PWP

-40 ° C to 85 ° C 32-pin 5 mm x 5 mm QFN TLC5940RHB

-40 ° C to 85 ° C 28-pin PDIP TLC5940NT

(1) For the most current package and ordering information, see the Package Option Addendum at the end

of this document, or see the TI website at www.ti.com .

ABSOLUTE MAXIMUM RATINGS.

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

V

Input voltage range

I

I

Output current (dc) 130 mA

O

V

Input voltage range V

I

V

Output voltage range

O

EEPROM program range V
EEPROM write cycles 50

ESD rating

T

Storage temperature range –55 ° C to 150 ° C

stg

T

Operating ambient temperature range –40 ° C to 85 ° C

A

Package thermal impedance

(1) 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.
(2) All voltage values are with respect to network ground terminal.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
(4) With PowerPAD soldered on PCB with 2 oz. trace of copper. See SLMA002 for further information.

(2)

VCC –0.3 V to 6 V

, V

(BLANK)

V

, V

(SOUT)

V

to V

(OUT0)
(PRG)

, V

(DCPRG)

(XERR)

(OUT15)

, V

(SCLK)

HBM (JEDEC JESD22-A114, Human Body Model) 2 kV
CBM (JEDEC JESD22-C101, Charged Device Model) 500 V

HTSSOP (PWP)

(3)

QFN (RHB) 35.9 ° C/W

(4)

PDIP (NP) 48 ° C/W

(1)

(1)

PART NUMBER

UNIT

(XLAT)

–0.3 V to V
–0.3 V to V

–0.3 V to 18 V
–0.3 V to 24 V

31.58 ° C/W

+0.3 V

CC

+0.3 V

CC

2

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RECOMMENDED OPERATING CONDITIONS

DC CHARACTERISTICS

V

CC

V

O

V

IH

V

IL

I

OH

I

OL

I

OLC

V

(PRG)

T

A

AC CHARACTERISTICS V

f

(SCLK)

f

(GSCLK)

t

wh0

t

wh1

t

wh2

t

wh3

t

su0

t

su1

t

su2

t

su3

t

su4

t

su5

t

h0

t

h1

t

h2

t

h3

t

h4

t

h5

t

prog

Supply Voltage 3 5.5 V
Voltage applied to output (OUT0–OUT15) 17 V
High-level input voltage 0.8 V
Low-level input voltage GND 0.2 V
High-level output current V
Low-level output current V

Constant output current

EEPROM program voltage 20 22 23 V
Operating free-air temperature range -40 85 ° C

Data shift clock frequency SCLK 30 MHz
Grayscale clock frequency GSCLK 30 MHz

/t

SCLK pulse duration SCLK = H/L (see Figure 8 ) 16 ns

wl0

/t

GSCLK pulse duration GSCLK = H/L (see Figure 13 ) 16 ns

wl1

XLAT pulse duration XLAT = H (see Figure 11 ) 20 ns
BLANK pulse duration BLANK = H (see Figure 13 ) 20 ns

Setup time

Hold Time

= 5 V at SOUT –1 mA

CC

= 5 V at SOUT, XERR 1 mA

CC

OUT0 to OUT15, V
OUT0 to OUT15, V

= 3 V to 5.5 V, TA= –40 ° C to 85 ° C (unless otherwise noted)

CC

< 3.6 V 60 mA

CC

> 3.6 V 120 mA

CC

SIN–SCLK (see Figure 11 ) 10 ns
SCLK–XLAT (see Figure 11 ) 10 ns
VPRG–SCLK (see Figure 6 ) 10 ns
VPRG–XLAT (see Figure 6 ) 10 ns
BLANK–GSCLK (see Figure 13 ) 10 ns
VPRG–DCPRG 1 ms
SCLK–SIN (see Figure 11 ) 10 ns
XLA–SCLK (see Figure 11 ) 10 ns
SCLK–VPRG (see Figure 6 ) 10 ns
XLAT–VPRG (see Figure 6 ) 10 ns
BLANK–GSCLK (see Figure 13 ) 10 ns
DCPRG–VPRG 1 ms
Programming time for EEPROM 20 ms

TLC5940

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

MIN NOM MAX UNIT

CC

V

CC
CC

V
V

DISSIPATION RATINGS

PACKAGE

28-pin HTSSOP with

PowerPAD™

(1)

soldered

28-pin HTSSOP with PowerPAD™ un- 2026 mW 16.21 mW/ ° C 1296 mW 1053 mW

soldered

32-pin QFN

(1)

28-pin PDIP 2456 mW 19.65 mW/ ° C 1572 mW 1277 mW

(1) The PowerPAD is soldered to the PCB with a 2 oz. copper trace. See SLMA002 for further information.

POWER RATING DERATING FACTOR POWER RATING POWER RATING

TA< 25 ° C ABOVE TA= 25 ° C TA= 70 ° C TA= 85 ° C

3958 mW 31.67 mW/ ° C 2533 mW 2058 mW

3482 mW 27.86 mW/ ° C 2228 mW 1811 mW

3

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TLC5940

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

ELECTRICAL CHARACTERISTICS

V

= 3 V to 5.5 V, TA= –40 ° C to 85 ° C (unless otherwise noted)

CC

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V
V

I

I

I

CC

I

O(LC)

I

lkg

∆ I

∆ I

∆ I

∆ I

∆ I

T
V

V

(1) Not tested. Specified by design

High-level output voltage IOH= -1 mA, SOUT VCC– 0.5 V

OH

Low-level output voltage IOL= 1 mA, SOUT 0.5 V

OL

VI= V
XLAT

Input current

VI= GND; VPRG –1 1
VI= VCC; VPRG 50
VI= 22 V; VPRG; DCPRG = V
No data transfer, all output OFF,

VO= 1 V, R
No data transfer, all output OFF,

Supply current mA

VO= 1 V, R
Data transfer 30 MHz, all output ON,

VO= 1 V, R
Data transfer 30 MHz, all output ON,

VO= 1 V, R

Constant output current All output ON, VO= 1 V, R
Leakage output current 0.1 µ A

All output OFF, VO= 15 V, R
OUT0 to OUT15

All output ON, VO= 1 V, R
OUT0 to OUT15, –20 ° C to 85 ° C

All output ON, VO= 1 V, R

Constant current error %

O(LC0)

OUT0 to OUT15
All output ON, VO= 1 V, R

OUT0 to OUT15, –20 ° C to 85 ° C
All output ON, VO= 1 V, R

V

CC

Constant current error ± 4 %

O(LC1)

Constant current error ± 4 %

O(LC2)

Device to device, Averaged current from OUT0 to –2
OUT15, R

Device to device, Averaged current from OUT0 to –2.7
OUT15, R

All output ON, VO= 1 V, R

Power supply rejection ratio,

O(LC3)

PSRR

OUT0 to OUT15
All output ON, VO= 1 V, R

OUT0 to OUT15
All output ON, VO= 1 V to 3 V, R

Load regulation

O(LC4)

OUT0 to OUT15
All output ON, VO= 1 V to 3 V, R

OUT0 to OUT15

Thermal error flag threshold Junction temperature

(TEF)

LED open detection threshold 0.3 0.4 V

(LED)

Reference voltage

(IREF)

output

R

I(REF)

or GND; BLANK, DCPRG, GSCLK, SCLK, SIN,

CC

= 10 k Ω

(IREF)

= 1.3 k Ω

(IREF)

= 1.3 k Ω

(IREF)

= 640 Ω

(IREF)

= 4.5 V to 5.5 V, OUT0 to OUT15

= 1920 Ω (20 mA) +0.4

(IREF)

= 480 Ω (80 mA) +2

(IREF)

(1)

CC

= 640 Ω 54 61 69 mA

(IREF)

= 640 Ω ,

(IREF)

= 640 Ω ,

(IREF)

= 640 Ω ,

(IREF)

= 320 Ω ,

(IREF)

= 320 Ω ,

(IREF)

= 640 Ω

(IREF)

= 320 Ω ,

(IREF)

= 640 Ω ,

(IREF)

= 320 Ω ,

(IREF)

–1 1

4 10 mA

0.9 6

5.2 12

16 25

30 60

± 1 ± 4

± 1 ± 8

± 1 ± 6

± 1 ± 8

± 1 ± 4 %/V

± 1 ± 6 %/V

± 2 ± 6 %/V

± 2 ± 8 %/V

150 170 ° C

= 640 Ω 1.20 1.24 1.28 V

µ A

4

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SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

SWITCHING CHARACTERISTICS

V

= 3 V to 5.5 V, TA= -40 ° C to 85 ° C (unless otherwise noted)

CC

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

t

r0

Rise time ns

t

r1

t

f0

Fall time ns

t

f1

t

pd0

t

pd1

t

pd2

Propagation delay time

t

pd3

t

pd4

t

pd5

t

Output delay time OUTn–OUT(n+1) (see Figure 13 ) 20 30 ns

d

SOUT 16
OUTn, V

= 5 V, TA= 60 ° C, DCx = 3F 10 30

CC

SOUT 16
OUTn, V

= 5 V, TA= 60 ° C, DCx = 3F 10 30

CC

SCLK–SOUT (see Figure 11 ) 30 ns
DCPRG–OUT0 30 ns
BLANK–OUT0 (see Figure 13 ) 60 ns
OUTn - XERR (see Figure 13 ) 1000 ns
GSCLK–OUT0 (see Figure 13 ) 60 ns
XLAT–I

(dot correction) 1000 ns

OUT

TLC5940

5

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1
2
3
4
5
6
7
8
9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

GND

BLANK

XLAT

SCLK

SIN

VPRG

OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7

VCC
IREF
DCPRG
GSCLK
SOUT
XERR
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8

PWP PACKAGE

(TOP VIEW)

Thermal

PAD

THERMAL

PAD

GSCLK24

SOUT23

XERR22

OUT1521

OUT1420

OUT1319

OUT1218

OUT1117

OUT1016
OUT915
OUT814
NC13
NC12
OUT711
OUT610
OUT59

OUT4 8

OUT3 7

OUT2 6

OUT1 5

OUT0 4

VPRG 3

SIN 2

SCLK 1

DCPRG 25

IREF 26

VCC 27

NC 28
NC 29

GND 30

BLANK 31

XLAT 32

RHB PACKAGE

(TOP VIEW)

NC − No internal connection

1
2
3
4
5
6
7
8

9
10
11
12
13
14

18
17
16
15

22
21
20
19

26
25
24
23

28
27

OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8

OUT9
OUT10
OUT11
OUT12
OUT13
OUT14

GND
VCC
IREF
DCPRG
GSCLK
SOUT
XERR
OUT15

SCLK
XLAT
BLANK

OUT0
VPRG
SIN

NT PACKAGE

(TOP VIEW)

TLC5940

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

DEVICE INFORMATION

6

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SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

DEVICE INFORMATION (continued)

TERMINAL FUNCTION

TERMINAL

NAME

BLANK 23 2 31 I

DCPRG 19 26 25 I DC is connected to the DC register.

GND 22 1 30 G Ground
GSCLK 18 25 24 I Reference clock for grayscale PWM control
IREF 20 27 26 I Reference current terminal

NC – – No connection
OUT0 28 7 4 O Constant current output

OUT1 1 8 5 O Constant current output
OUT2 2 9 6 O Constant current output
OUT3 3 10 7 O Constant current output
OUT4 4 11 8 O Constant current output
OUT5 5 12 9 O Constant current output
OUT6 6 13 10 O Constant current output
OUT7 7 14 11 O Constant current output
OUT8 8 15 14 O Constant current output
OUT9 9 16 15 O Constant current output
OUT10 10 17 16 O Constant current output
OUT11 11 18 17 O Constant current output
OUT12 12 19 18 O Constant current output
OUT13 13 20 19 O Constant current output
OUT14 14 21 20 O Constant current output
OUT15 15 22 21 O Constant current output
SCLK 25 4 1 I Serial data shift clock
SIN 26 5 2 I Serial data input
SOUT 17 24 23 O Serial data output
VCC 21 28 27 I Power supply voltage

VPRG 27 6 3 I device is in DC mode. When VPRG = V

XERR 16 23 22 O Error output. XERR is an open-drain terminal. XERR goes L when LOD or TEF is detected.
XLAT 24 3 32 I

DIP PWP RHB

NO. I/O DESCRIPTION

Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF. GS counter is also
reset. When BLANK = L, OUTn are controlled by grayscale PWM control.

Switch DC data input. When DCPRG = L, DC is connected to EEPROM. When DCPRG = H,
DCPRG is also controls EEPROM writing, when VPRG = V

12, 13,

28, 29

Multifunction input pin. When VPRG = GND, the device is in GS mode. When VPRG = VCC, the
EEPROM with DCPRG=HIGH.

Data latch. Note that the internal connections are switched by VPRG. At XLAT ↑ (VPRG =
GND), GS register gets new data. At XLAT ↑ (VPRG = VCC), DC register gets new data.

(PRG)

, DC register data can programmed into DC

(PRG)

TLC5940

7

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VCC

INPUT

GND

400 W

INPUT EQUIVALENT CIRCUIT

(BLANK, XLAT, SCLK, SIN, GSCLK, DCPRG)

23 W

23 W

SOUT

GND

OUTPUT EQUIVALENT CIRCUIT (SOUT)

_

+

Amp

400 W

100 W

VCC

INPUT

GND

INPUT EQUIVALENT CIRCUIT (IREF)

XERR

GND

OUTPUT EQUIVALENT CIRCUIT (XERR)

23 W

INPUT

INPUT

GND

GND

INPUT EQUIVALENT CIRCUIT (VCC)

INPUT EQUIVALENT CIRCUIT (VPRG)

OUT

GND

OUTPUT EQUIVALENT CIRCUIT (OUT)

TLC5940

SLVS515A – DECEMBER 2004 – REVISED AUGUST 2005

PARAMETER MEASUREMENT INFORMATION

PIN EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS

Resistor values are equivalent resistances, and they are not tested.

Figure 1. Input and Output Equivalent Circuits

8