参数资料
型号: NCP5612MUTBG
厂商: ON Semiconductor
文件页数: 9/11页
文件大小: 0K
描述: IC WHITE LED DRVR 12-LLGA
标准包装: 1
拓扑: 切换式电容器(充电泵)
输出数: 2
内部驱动器:
类型 - 主要: 背光,闪灯/白光
类型 - 次要: 白色 LED
频率: 1MHz
电源电压: 2.7 V ~ 5.5 V
输出电压: 4.8 V ~ 5.7 V
安装类型: 表面贴装
封装/外壳: 12-UFLGA 裸露焊盘
供应商设备封装: 12-LLGA(2x2)
包装: 剪切带 (CT)
工作温度: -40°C ~ 85°C
其它名称: NCP5612MUTBGOSCT
NCP5612
DIMMING
The built?in Single Wire Serial Link interface provides
a simple way to accurately control the output current
flowing in the two LED. Provision have been made, at
silicon level, to provide a full dimming of the backlight
(NORMAL mode of operation), the ICON current being
adjustable in four steps when it is activated.
Table 1. LED Dimming Configuration
Bit Clock
1
2
3
4
5
6
I?LED(mA)
1
2
3
4
5
6
Bit Clock
9
10
11
12
13
14
I?LED(mA)
12
14
16
19
22
25
Pulse Count
Pulse 1
LED activity
LED#2 = 100 m A, LED#1 de?activated
7
8
8
10
15
16
28
31
Pulse 2
LED#2 = 150 m A, LED#1 de?activated
35
Pulse 3
Pulse 4
Pulse 5 to Pulse 20
LED#2 = 250 m A, LED#1 de?activated
LED#2 = 450 m A, LED#1 de?activated
ICON de?activated, NORMAL back-
30
25
I OUT = F(Bit Clock)
(linear scale)
light takes place
The DC/DC converter is switched OFF and the two LED
are disconnected when LED?REG=$00.
When the ICON mode is activated, the DC/DC converter
is switched OFF, LED#1 is deactivated from the LED
current sense and the programmed bias current (powered
from the V bat source) is forced into LED#2.
20
15
10
5.0
0
0
5.0
10
15
20
BIT CLOCK
Figure 9. Typical Output Current Slope
Figure 10. Typical Efficiency
http://onsemi.com
9
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