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參數資料
| 型號： | ADM8845 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Charge Pump Driver for LCD White LED Backlights |
| 中文描述： | 電荷泵驅動器的液晶顯示白色LED背光源 |
| 文件頁數： | 13/18頁 |
| 文件大小： | 341K |
| 代理商： | ADM8845 |
Preliminary Technical Data
ADM8845
Rev. PrJ 06/04| Page 13 of 18
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Figure 25. ADM8845 Application Timing
CTRL1
0
0
1
1
0
PWM
1
PWM
PWM
CTRL2
0
1
0
1
PWM
0
PWM
1
PWM
LED Operation
Notes
5a, 5d
5a, 5c
5a, 5d
5a, 5c
5b, 5e
5e, 5d
5e a,5
5e, 5e
5e, 5e
Sub Display Off / Main Display Off (Full Shutdown)
Sub Display Off / Main Display On
Sub Display On / Main Display Off
Sub Display On / Main Display On (Full On)
Sub Display Off/ Digital PWM Brightness Control on Main Display
Digital PWM Brightness Control on Sub Display / Main Display Off
Sub Display On/ Digital PWM Brightness Control on Main Display
Digital PWM Brightness Control on Sub Display / Main Display On
Digital PWM Brightness Control on Sub and Main Display
Table 7. ADM8845 Digital Inputs Truth Table
The six white LED in the ADM8845 are arranged into 2 groups, sub and main. It is possible to configure the six LEDs as in Table 7,
ADM8845 Digital Inputs Truth Table, refer also to Figure 25, ADM8845 Application Timing.
Note 5a: Sub Display on means the display is on with the maximum brightness set by the R
SET
resistor. CTRL1 = 1 means a constant logic
level (V
CC
) is applied to CTRL1.
Note 5b: Sub Display off means the sub display LEDs only is off. CTRL1 = 0 means a constant logic level (GND) is applied to CTRL1.
Note 5c: Main Display on means the display is on with the maximum brightness set by the R
SET
resistor. CTRL2 = 1 means a constant logic
level (V
CC
) is applied to CTRL2.
Note 5d: Main Display off means the main display only is off. CTRL2 = 0 means a constant logic level (GND) is applied to CTRL2.
Note 5e: PWM means a digital PWM signal is applied to the CTRL1 and/or CTRL2 pin with a frequency from 100Hz to 200kHz.
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| ADM8845ACP | 制造商:Analog Devices 功能描述:CHG PUMP STPUP 30MA 16LFCSP - Bulk |
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| ADM8845ACPZ-REEL | 功能描述:IC LED DRVR WHITE BCKLGT 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數:4 內部驅動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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