TLC5946 datasheet(4/35 Pages) TI

No. de pieza	TLC5946

Descripción Electrónicos	16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction

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Fabricante Electrónico	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

D

(%)=

I

OUTn

-

1

(I

+I

+...+I

)

OUT0

OUT1

OUT15

16

´

100

.

D

(%)=

IdealOutputCurrent

-

(IdealOutputCurrent)

(I

+I

+...I

+I

)

OUT0

OUT1

OUT14

OUT15

16

´

100

I

=42.5

´

OUT(IDEAL)

1.20

R

IREF

100

(I

atV

=3.0V)

OUTn

CC

(I

atV

=5.5V)

(I

atV

=3.0V)

OUTn

CC

OUTn

CC

-

5.5V

3V

-

D

(%/V)=

´

100

3V

1V

-

´

(I

atV

=1V)

OUTn

(I

atV

=3V)

(I

atV

=1V)

-

OUTn

D

(%/V)=

TLC5946

SLVS824B – MARCH 2008 – REVISED JUNE 2008 .......................................................................................................................................................... www.ti.com

At VCC = 3.0 V to 5.5 V, TA = –40°C to +85°C, and RIREF = 1.3kΩ. Typical values at VCC = 3.3 V and TA = +25°C, unless

otherwise noted.

TLC5946

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

High-level output voltage

IOH = –1 mA at SOUT

VCC – 0.4

V

IOL = 1 mA at SOUT

0.4

V

VOL

Low-level output voltage

IOL = 5 mA at XERR

0.5

V

VIN = VCC or GND at BLANK, XHALF, GSCLK, SCLK,

IIN

Input current

–1

1

µA

SIN, XLAT, and MODE pins

No data transfer, all OUTn = OFF, VOUTn = 1 V,

ICC1

0.9

3

mA

DCn = 3Fh, RIREF = 13 kΩ

No data transfer, all OUTn = OFF, VOUTn = 1 V,

ICC2

4

8

mA

DCn = 3Fh, RIREF = 2.7 kΩ

Supply current

Data transfer at 30 MHz, all OUTn = ON, VOUTn = 1 V,

ICC3

13

25

mA

DCn = 3Fh, RIREF = 2.7 kΩ

Data transfer at 30 MHz, all OUTn = ON, VOUTn = 1 V,

ICC4

20

45

mA

DCn = 3Fh

IOLC

Constant output current

All OUTn = ON, VOUTn = 1 V, VOUTfix = 1 V, DCn = 3Fh

35.5

39.0

42.5

mA

All OUTn = OFF, VOUTn = 17 V, DCn = 3Fh

IOLK1

Output leakage current

0.1

µA

At OUT0 to OUT15

IOLK2

Output leakage current

No error condition, VXERR = 5.5 V, at XERR

1

µA

Constant current error

ΔIOLC

All OUTn = ON, VOUTn = 1 V, VOUTfix = 1 V, DCn = 3Fh

±1

±3

%

(channel-to-channel)(1)

Constant current error

ΔIOLC1

All OUTn = ON, VOUTn = 1 V, VOUTfix = 1 V, DCn = 3Fh

±2

±6

%

(device-to-device)(2)

All OUTn = ON, VOUTn = 1 V, VOUTfix = 1 V,

ΔIOLC2

Line regulation(3)

±0.5

±1

%

VCC = 3.0 V to 5.5 V, DCn = 3Fh

All OUTn = ON, VOUTn = 1 V to 3 V,

ΔIOLC3

Load regulation(4)

±1

±3

%/V

VOUTfix = 1 V, DCn = 3Fh

TTEF

Thermal error flag threshold

Junction temperature(5)

+150

+162

+175

°C

THYS

Thermal error hysteresis

Junction temperature(5)

+5

+10

+20

°C

VLOD

LED open detection threshold

All OUTn = ON

0.2

0.3

0.4

V

VIREF

Reference voltage output

1.16

1.20

1.24

V

(1)

The deviation of each output from the average of OUT0–OUT15 constant current. Deviation is calculated by the formula:

(2)

The deviation of the OUT0–OUT15 constant current average from the ideal constant current value.

Deviation is calculated by the following formula:

Ideal current is calculated by the formula:

(3)

Line regulation is calculated by this equation:

(4)

Load regulation is calculated by the equation:

(5)

Not tested. Specified by design.

4

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