參數資料
型號： 935289802118
廠商： NXP SEMICONDUCTORS
元件分類： 顯示驅動器
英文描述： LED DISPLAY DRIVER, PDSO28
封裝： 4.40 MM, PLASTIC, MO-153, SOT361-1, TSSOP-28
文件頁數： 8/54頁
文件大?。?/td> 410K
代理商： 935289802118
PCA9685_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 July 2009
16 of 50
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I2C-bus LED controller
Example 1: (assumes that the LED0 output is used and
(delay time) + (PWM duty cycle)
≤ 100 %)
Delay time = 10 %; PWM duty cycle = 20 % (LED on time = 20 %; LED off time = 80 %).
Delay time = 10 % = 409.6 ~ 410 counts = 19Ah.
Since the counter starts at 0 and ends at 4095, we will subtract 1, so delay time = 199h
counts.
LED0_ON_H = 1h; LED0_ON_L = 99h
LED on time = 20 % = 819.2 ~ 819 counts.
Off time = 4CCh (decimal 410 + 819
1 = 1228)
LED0_OFF_H = 4h; LED0_OFF_L = CCh
Example 2: (assumes that the LED4 output is used and
(delay time) + (PWM duty cycle > 100 %)
Delay time = 90 %; PWM duty cycle = 90 % (LED on time = 90 %; LED off time = 10 %).
Delay time = 90 % = 3686.4 ~ 3686 counts
1 = 3685 = E65h.
LED4_ON_H = Eh; LED4_ON_L = 65h
LED on time = 90 % = 3686 counts.
Since the delay time and LED on period of the duty cycle is greater than 4096 counts,
the LEDn_OFF count will occur in the next frame. Therefore, 4096 is subtracted from
the LEDn_OFF count to get the correct LEDn_OFF count. See Figure 9, Figure 10 and
Off time = 4CBh (decimal 3685 + 3686 = 7372
4096 = 3275)
LED4_OFF_H = 4h; LED4_OFF_L = CBh
Fig 7.
LED output, example 1
0
STOP
example 1
LEDn_ON
LEDn_OFF
4095 0
819
1228
4095 0
002aad812
819
1228
819
1228
819
1228
Fig 8.
LED output, example 2
0
STOP
example 2
LEDn_ON
LEDn_OFF
4095 0
3686
4095 0
002aad813
3275
3686
3275
3686
相關PDF資料
PDF描述
935288883112 DATACOM, INTERFACE CIRCUIT, PDSO8
935288883115 DATACOM, INTERFACE CIRCUIT, PDSO8
935288883118 DATACOM, INTERFACE CIRCUIT, PDSO8
935085330112 DATACOM, INTERFACE CIRCUIT, PDSO8
935085330115 DATACOM, INTERFACE CIRCUIT, PDSO8
相關代理商/技術參數
參數描述
9-3528-TP 制造商:Keystone Electronics Corp 功能描述:
935290014599 制造商:NXP Semiconductors 功能描述:KIT OM12097
935290808118 制造商:NXP Semiconductors 功能描述:IC ANALOG SWITCH 8CH 16TSSOP
935290809118 制造商:NXP Semiconductors 功能描述:IC ANALOG SWITCH SPDT 16TSSOP
935290874112 制造商:NXP Semiconductors 功能描述:IC PWR AMP I2C BUS CTRL DBS27P
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯系方式

*
*
*