参数资料
型号: PCA9625D/S911,518
厂商: NXP Semiconductors
文件页数: 16/33页
文件大小: 0K
描述: IC LED DRIVER RGBA 32-SOIC
标准包装: 1,000
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: 1MHz
电源电压: 2.3 V ~ 5.5 V
输出电压: 24V
安装类型: 表面贴装
封装/外壳: 32-SOIC(0.295",7.50mm 宽)
供应商设备封装: 32-SO
包装: 管件
工作温度: -40°C ~ 85°C
其它名称: 935285147518
PCA9625D/S911-T
PCA9625D/S911-T-ND
NXP Semiconductors
PCA9625
16-bit Fm+ I 2 C-bus 100 mA 24 V LED driver
7.7 Individual brightness control with group dimming/blinking
A 97 kHz ?xed frequency signal with programmable duty cycle (8 bits, 256 steps) is used
to control individually the brightness for each LED.
On top of this signal, one of the following signals can be superimposed (this signal can be
applied to the 4 LED outputs):
? A lower 190 Hz ?xed frequency signal with programmable duty cycle (8 bits,
256 steps) is used to provide a global brightness control.
? A programmable frequency signal from 24 Hz to 1 ? 10.73 Hz (8 bits, 256 steps) with
programmable duty cycle (8 bits, 256 steps) is used to provide a global blinking
control.
1
2
3
4
5
6
7
8
9 10 11 12
507
508
509
510
511
512
1
2
3
4
5
6
7
8
9 10 11
Brightness Control signal (LEDn)
N × 40 ns
with N = (0 to 255)
M × 256 × 2 × 40 ns
with M = (0 to 255)
(GRPPWM Register)
(PWMx Register)
256 × 40 ns = 10.24 μ s
(97.6 kHz)
Group Dimming signal
256 × 2 × 256 × 40 ns = 5.24 ms (190.7 Hz)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
resulting Brightness + Group Dimming signal
002aab417
Minimum pulse width for LEDn Brightness Control is 40 ns.
Minimum pulse width for Group Dimming is 20.48 μ s.
When M = 1 (GRPPWM register value), the resulting LEDn Brightness Control + Group Dimming signal will have 2 pulses of
the LED Brightness Control signal (pulse width = N × 40 ns, with ‘N’ de?ned in PWMx register).
This resulting Brightness + Group Dimming signal above shows a resulting Control signal with M = 4 (8 pulses).
Fig 6.
PCA9625_2
Brightness + Group Dimming signals
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 15 January 2008
16 of 33
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