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参数资料
| 型号： | NCP1840Q8A6MNTWG |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 12CH PROGR 20QFN |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 切换式电容器（充电泵），PWM |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，通用 |
| 频率： | 400kHz |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 4.1V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
NCP1840
REGISTER ADDRESS MAP
Address ? Binary
A4
0
0
0
0
0
0
1
1
A3
1
1
1
1
1
1
0
0
A2
0
0
1
1
1
1
0
0
A1
1
1
0
0
1
1
0
0
A0
0
1
0
1
0
1
0
1
Address ? Hex
A
B
C
D
E
F
10
11
LED3 PWM Register
LED4 PWM Register
LED5 PWM Register
LED6 PWM Register
LED7 PWM Register
LED8 PWM Register
Output Control Register
Main Status Register
Function
Current Level Registers
The current through each of the 8 channels on the
NCP1840 can be individually programmed by loading the
appropriate data into the Current Level Register for each
channel. There are 32 different current levels per channel
CURRENT LEVEL REGISTER DESCRIPTION
Data ? Binary
that are implemented as a logarithmically scaled percentage
of the maximum current, dictated by an external resistor
R BIAS . A description of the 32 different current levels can be
found in the following table.
D7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Data ? Hex
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
Percentage of Maximum Current
2.8333%
3.1667%
3.5333%
3.9667%
4.4667%
5.0000%
5.6333%
6.3000%
7.0667%
7.9333%
8.9000%
10.0000%
11.2333%
12.6000%
14.1333%
15.8667%
17.8000%
19.9667%
22.4000%
25.1333%
28.2000%
31.6333%
35.4667%
39.8000%
http://onsemi.com
11
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