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| 型号： | NCP5612GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5612G |
| 设计资源： | NCP5612 EVB BOM NCP5612GEVB Gerber Files NCP5612 EVB Schematic NCP5612 BOM - V1.0 |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 60mA |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 4.8 ~ 5.7 V |
| 特点： | 亮度控制 |
| 输入电压： | 3.6V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP5612 |
| 其它名称： | NCP5612GEVBOS |
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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