参数资料
型号: PCA9552D,118
厂商: NXP Semiconductors
文件页数: 7/28页
文件大小: 0K
描述: IC LED DRIVER BLINKER 24-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: LED 闪烁器
频率: 400kHz
电源电压: 2.3 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SO
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
其它名称: 935272395118
PCA9552D-T
PCA9552D-T-ND
Philips Semiconductors
PCA9552
16-bit I 2 C-bus LED driver with programmable blink rates
6.3.3 PCS0 - Frequency Prescaler 0
PSC0 is used to program the period of the PWM output.
The period of BLINK0 = (PSC0 + 1) / 44.
Table 6:
PSC0 - Frequency Prescaler 0 register description
Bit
Symbol
Default
7
PSC0[7]
1
6
PSC0[6]
1
5
PSC0[5]
1
4
PSC0[4]
1
3
PSC0[3]
1
2
PSC0[2]
1
1
PSC0[1]
1
0
PSC0[0]
1
6.3.4 PWM0 - Pulse Width Modulation 0
The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED off)
when the count is less than the value in PWM0 and HIGH when it is greater. If PWM0 is
programmed with 00h, then the PWM0 output is always LOW.
The duty cycle of BLINK0 = (256 ? PWM0) / 256.
Table 7:
PWM0 - Pulse Width Modulation 0 register description
Bit
Symbol
Default
7
PWM0
[7]
1
6
PWM0
[6]
0
5
PWM0
[5]
0
4
PWM0
[4]
0
3
PWM0
[3]
0
2
PWM0
[2]
0
1
PWM0
[1]
0
0
PWM0
[0]
0
6.3.5 PCS1 - Frequency Prescaler 1
PSC1 is used to program the period of the PWM output.
The period of BLINK1 = (PSC1 + 1) / 44.
Table 8:
PSC1 - Frequency Prescaler 1 register description
Bit
Symbol
Default
7
PSC1[7]
1
6
PSC1[6]
1
5
PSC1[5]
1
4
PSC1[4]
1
3
PSC1[3]
1
2
PSC1[2]
1
1
PSC1[1]
1
0
PSC1[0]
1
6.3.6 PWM1 - Pulse Width Modulation 1
The PWM1 register determines the duty cycle of BLINK1. The outputs are LOW (LED off)
when the count is less than the value in PWM1 and HIGH when it is greater. If PWM1 is
programmed with 00h, then the PWM1 output is always LOW.
The duty cycle of BLINK1 = (256 ? PWM1) / 256.
Table 9:
PWM1 - Pulse Width Modulation 1 register description
Bit
Symbol
Default
7
PWM1
[7]
1
6
PWM1
[6]
0
5
PWM1
[5]
0
4
PWM1
[4]
0
3
PWM1
[3]
0
2
PWM1
[2]
0
1
PWM1
[1]
0
0
PWM1
[0]
0
PCA9552_5
? Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 05 — 9 March 2006
7 of 28
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