Data sheet – Diodes AP2502 User Manual
Page 5
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