點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC

.

新竹市科學園區展業一路9號7樓之1

9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.

Tel：886-3-5645656

Fax：886-3-5645626

16-channel 12-bit PWM Constant Current LED Driver

Version:A.003

Page 6

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DM631

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

Input Voltage “H” Level

VIH

CMOS logic level

0.8*VCC

⎯

VCC

Input Voltage “L” Level

VIL

CMOS logic level

GND

⎯

0.2*VCC

V

Output Leakage Current

IOL

VOH = 17 V

⎯

⎯

±1.0

uA

VOL

IOL = 1.25 mA

⎯

⎯

0.2

Output Voltage (S-OUT)

VOH

IOH= 1.2 mA

VCC-0.4

⎯

⎯

V

Output Current Skew

(Channel-to-Channel)

*1

IOL1

⎯

⎯

±3

%

Output Current Skew

(Chip-to-Chip)

*2

IOL2

VOUT = 1.0 V

Rrext = 2.2 K

Ω

25.79

⎯

29.08

mA

Output Voltage Regulation

% / VOUT

Rrext = 2.2 K

Ω

VOUT = 1 V ~ 3 V

⎯

±0.1

±0.5

Supply Voltage Regulation

% / VCC

Rrext = 2.2 K

Ω

⎯

±1

±4

% / V

LED Open Detection Threshold

V(od)

all outputs turn on

⎯

0.3

⎯

V

power on

all pins are open

unless VCC and GND

(fee-running mode)

⎯

5.39

6.5

power on

all pins are open

unless VCC and GND

(external GCK mode)

⎯

4.57

⎯

input signal is static

Rrext = 12.4 K

Ω

all outputs turn off

⎯

5.91

⎯

input signal is static

Rrext = 2.2 K

Ω

all outputs turn off

⎯

8.10

⎯

Supply Current

*3

input signal is static

Rrext = 570

Ω

all outputs turn off

⎯

17.11

⎯

mA

Iout = (Imax + Imin) / 2.