Data Sheet

4-CH Linear Constant Current Sink With Matching

AP2502

Oct. 2010

Rev 1. 1

BCD Semiconductor Manufacturing Limited

5

Recommended Operating Conditions

Electrical Characteristics

VIN=3.6V, VF_LED=3.2V, TA = 25°C, unless otherwise specified.

Parameter

Symbol

Test Conditions

Min Typ Max

Unit

LED Dropout Voltage

VDROPOUT

ISINK =20mA

65

120

mV

Enable PIN High Voltage

VIH

2

6

V

Enable PIN Low Voltage

VIL

0

0.5

V

LED

Maximum

Sink

Current

ILED(MAX)

VCC=3.3 to 6.0V, Enable=VCC

18

20

22

mA

Sink

Current

Matching

Between each Channel

ILED-MATCH

VLED=0.4V

0.5

1

%

Quiescent Current

IQ

ILED1=ILED2=ILED3=ILED4=20mA

125

180

µA

Shutdown Current

ISHUTDOWN

Set EN Pin Low

0.1

1

µA

Thermal Resistance (Junction

to Case)

θ

JC

80

°C/W

PWM Frequency to Adjust

Brightness

fPWM

150

kHz

EN Pin Pulse High Time

THIGH

1

µs

EN Pin Pulse Low Time

TLOW

100

ns

Thermal

Shutdown

Temperature

TOTSD

150

Thermal

Shutdown

Hysteresis

THYOTSD

25

°C

Value

Parameter

Symbol

Min

Max

Unit

Enable Input Voltage

VEN

2.0

6.0

V

Operating Temperature Range

TA

-40

85

°C

Sink Current

ILED

20

mA