Data sheet – Diodes AP2502 User Manual

Page 5

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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

V

IN

=3.6V, V

F_LED

=3.2V, T

A

= 25°C, unless otherwise specified.

Parameter Symbol

Test

Conditions

Min

Typ

Max

Unit

LED Dropout Voltage

V

DROPOUT

I

SINK

=20mA

65

120

mV

Enable PIN High Voltage

V

IH

2 6 V

Enable PIN Low Voltage

V

IL

0

0.5 V

LED Maximum Sink
Current

I

LED(MAX)

V

CC

=3.3 to 6.0V, Enable=V

CC

18 20

22 mA

Sink Current Matching
Between each Channel

I

LED-MATCH

V

LED

=0.4V

0.5

1

%

Quiescent Current

I

Q

I

LED1

=I

LED2

=I

LED3

=I

LED4

=20mA

125

180

µA

Shutdown Current

I

SHUTDOWN

Set EN Pin Low

0.1

1

µA

Thermal Resistance (Junction
to Case)

θ

JC

80

°C/W

PWM Frequency to Adjust
Brightness

f

PWM

150

kHz

EN Pin Pulse High Time

T

HIGH

1

µs

EN Pin Pulse Low Time

T

LOW

100

ns

Thermal Shutdown
Temperature

T

OTSD

150

Thermal Shutdown
Hysteresis

T

HYOTSD

25

°C

Value

Parameter Symbol

Min Max

Unit

Enable Input Voltage

V

EN

2.0

6.0

V

Operating Temperature Range

T

A

-40

85

°C

Sink Current

I

LED

20

mA

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