参数资料
型号: PCA9634PW/S911,118
厂商: NXP Semiconductors
文件页数: 12/38页
文件大小: 0K
描述: IC LED DRIVER RGBA 20-TSSOP
标准包装: 2,500
拓扑: 开路漏极,PWM
输出数: 8
内部驱动器: 两者兼有
类型 - 主要: 背光,LED 闪烁器
类型 - 次要: RGBA
频率: 25MHz
电源电压: 2.3 V ~ 5.5 V
输出电压: 5.5V
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 管件
工作温度: -40°C ~ 85°C
其它名称: 935285522118
PCA9634PW/S911-T
PCA9634PW/S911-T-ND
NXP Semiconductors
PCA9634
8-bit Fm+ I 2 C-bus LED driver
Table 6. MODE2 - Mode register 2 (address 01h) bit description …continued
Legend: * default value.
Bit
1 to 0
Symbol
OUTNE[1:0] [3]
Access
R/W
Value
00
Description
when OE = 1 (output drivers not enabled), LEDn = 0
01*
10
11
when OE = 1 (output drivers not enabled):
LEDn = 1 when OUTDRV = 1
LEDn = high-impedance when OUTDRV = 0 (same as OUTNE[1:0] = 10)
when OE = 1 (output drivers not enabled), LEDn = high-impedance
reserved
[1]
[2]
[3]
See Section 7.7 “Using the PCA9634 with and without external drivers” for more details. Normal LEDs can be driven directly in either
mode. Some newer LEDs include integrated Zener diodes to limit voltage transients, reduce EMI and protect the LEDs, and these must
be driven only in the open-drain mode to prevent overheating the IC.
Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9634. Applicable to registers from
02h (PWM0) to 0Dh (LEDOUT) only.
See Section 7.4 “Activ e LOW output enable input” for more details.
7.3.3 PWM0 to PWM7: Individual brightness control
Table 7. PWM0 to PWM7 - PWM registers 0 to 7 (address 02h to 09h) bit description
Legend: * default value.
Address
Register
Bit
Symbol
Access Value
Description
02h
03h
04h
05h
06h
07h
08h
09h
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
IDC0[7:0]
IDC1[7:0]
IDC2[7:0]
IDC3[7:0]
IDC4[7:0]
IDC5[7:0]
IDC6[7:0]
IDC7[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0000 0000* PWM0 Individual Duty Cycle
0000 0000* PWM1 Individual Duty Cycle
0000 0000* PWM2 Individual Duty Cycle
0000 0000* PWM3 Individual Duty Cycle
0000 0000* PWM4 Individual Duty Cycle
0000 0000* PWM5 Individual Duty Cycle
0000 0000* PWM6 Individual Duty Cycle
0000 0000* PWM7 Individual Duty Cycle
A 97 kHz ?xed frequency signal is used for each output. Duty cycle is controlled through
256 linear steps from 00h (0 % duty cycle = LED output off) to FFh
(99.6 % duty cycle = LED output at maximum brightness). Applicable to LED outputs
programmed with LDRx = 10 or 11 (LEDOUT0 and LEDOUT1 registers).
IDC [ 7 : 0 ]
PCA9634_6
duty cycle = ------------------------
256
(1)
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 12 September 2008
12 of 38
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