参数资料
型号: PCA9635PW/S911,118
厂商: NXP Semiconductors
文件页数: 12/35页
文件大小: 0K
描述: IC LED DRIVER RGBA 28-TSSOP
标准包装: 2,500
拓扑: 开路漏极,PWM
输出数: 16
内部驱动器:
类型 - 主要: 背光,LED 闪烁器
类型 - 次要: RGBA
频率: 100kHz ~ 1MHz
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: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
其它名称: 935285521118
PCA9635PW/S911-T
PCA9635PW/S911-T-ND
NXP Semiconductors
PCA9635
16-bit Fm+ I 2 C-bus LED driver
7.3.4 GRPPWM, group duty cycle control
Table 8. GRPPWM - Group brightness control register (address 12h) bit description
Legend: * default value
Address
12h
Register
GRPPWM
Bit
7:0
Symbol
GDC[7:0]
Access
R/W
Value
1111 1111
Description
GRPPWM register
When DMBLNK bit (MODE2 register) is programmed with logic 0, a 190 Hz ?xed
frequency signal is superimposed with the 97 kHz individual brightness control signal.
GRPPWM is then used as a global brightness control allowing the LED outputs to be
dimmed with the same value. The value in GRPFREQ is then a ‘Don’t care’.
General brightness for the 16 outputs is controlled through 256 linear steps from 00h
(0 % duty cycle = LED output off) to FFh (99.6 % duty cycle = maximum brightness).
Applicable to LED outputs programmed with LDRx = 11 (LEDOUT0 to LEDOUT3
registers).
When DMBLNK bit is programmed with logic 1, GRPPWM and GRPFREQ registers
de?ne a global blinking pattern, where GRPFREQ contains the blinking period (from
24 Hz to 10.73 s) and GRPPWM the duty cycle (ON/OFF ratio in %).
GDC [ 7 : 0 ]
duty cycle = ---------------------------
256
7.3.5 GRPFREQ, group frequency
Table 9. GRPFREQ - Group Frequency register (address 13h) bit description
Legend: * default value.
(2)
Address
13h
Register
GRPFREQ
Bit
7:0
Symbol
GFRQ[7:0]
Access
R/W
Value
0000 0000*
Description
GRPFREQ register
GRPFREQ is used to program the global blinking period when DMBLNK bit (MODE2
register) is equal to 1. Value in this register is a ‘Don’t care’ when DMBLNK = 0.
Applicable to LED outputs programmed with LDRx = 11 (LEDOUT0 to LEDOUT3
registers).
Blinking period is controlled through 256 linear steps from 00h (41 ms, frequency 24 Hz)
to FFh (10.73 s).
global blinking period = ---------------------------------------- ( s )
PCA9635_7
GFRQ [ 7 : 0 ] + 1
24
(3)
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 — 16 July 2009
12 of 35
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