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PDF BL8581A Data sheet ( Hoja de datos )

Número de pieza BL8581A
Descripción 4-Channels WLED Linear Driver
Fabricantes BELLING 
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No Preview Available ! BL8581A Hoja de datos, Descripción, Manual

BL8581A
PWM or Singl-Wire Dimming, 4-Channels WLED Linear Driver
DESCRIPTION
The BL8581A is a CMOS based White/Blue
LED driver with stand-alone capability. The
driver is primarily designed for LED
backlighting of LCD display powered by Li-ion
battery With its high efficiency, low standby
current and wide range of input supply
voltage, the BL8581A is suitable for
applications such as portable device display
and keypad backlighting. It can realize PWM
or single-wire dimming control through EN pin.
BL8581A has four LED channels with MSOP-
8 or QFN 3X3 -16 package.
FEATURES
2.7 to 5.5V input range
Single-wire dimming control with linear
16- steps
PWM dimming control
LED sink current of max. 20mA
Independent current sink circuit for each
LED output
Low standby current
High accuracy current match on each
channel
APPLICATIONS
Small Size Color LCD Backlights Driver
Mobile Phone, Portable DeviEN Keypad
Backlights Driver
TYPICAL APPLICATION
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BL8581A pdf
BL8581A
TYPICAL PERFORMANEN CHARACTERISTICS
Quiescent Current vs Supply Current
(Ta=25℃)
350
300
250
200
150
100
50
0
3.0
3.5 4.0 4.5
Supply Voltage (V)
5.0
Quiescent Current vs Temperature
(VCC=3.7V)
450
400
350
300
250
200
150
100
50
0
-40 -20
0
20 40 60 80 100 120 140
Temperature (℃)
ILED vs Supply Voltage
(VCC=3.7V, VLEDn=3.2V)
22
20
18
16
14
12
10
3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2
Supply Voltage (V)
ILED vs LEDn Dropout Voltage
(VCC=3.7V)
25
20
15
10
5
0
0.01
0.1 1
LEDn Dropout Voltage (V)
10
ILED vs Temperature
(VCC=3.7V)
20.2
20.2
20.1
20.1
20.0
20.0
19.9
19.9
19.8
19.8
19.7
-50
-25
0 25 50 75 100 125
Temperature (℃)
LED Current VS Code_No
20
16
12
8
4
0
0 2 4 6 8 10 12 14 16
Code_No
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