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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： | 16/18頁 |
| 文件大小： | 341K |
| 代理商： | ADM8845 |
ADM8845
Preliminary Technical Data
DRIVING CAMERA LIGHT, MAIN AND SUB LEDS
The ADM8845 can also be configured to power a camera light which is composed of four white LEDs in parallel, packaged into one
package. FB1 to FB4 now power the camera light and FB5 and FB6 powers the main display and the sub display LED is powered from the
ADM8845 by using an external current mirror to control the current flowing through the sub white LED, see Figure 32. All white LEDs
have 15mA/LED, therefore total load on the ADM8845 charge pump is 105mA, max load on the ADM8845 charge pump is 180mA see
Figure 22.
Rev. PrJ 06/04 | Page 16 of 18
Charge Pump
1x/1.5x/2x mode
Control
Logic
VCC
C4
Osc
Vref
+
-
LED Current
Control
Circuit
Current Controlled Sinks
Iset
GND
ADM8845
Vout
FB2
FB3
FB4
FB5
FB6
FB1
C3
C1
C2
Rset
9.44k
Current
Control
1
Current
Control
2
Current
Control
3
Current
Control
4
Current
Control
5
Current
Control
6
CTRL1
CTRL2
Main
Camera
Sub
R
Current
Control
7
15mA/LED
15mA/LED
15mA/LED
Figure 32. ADM8845 Driving Camera Light + Two Main + One Sub
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM8845ACP | 制造商:Analog Devices 功能描述:CHG PUMP STPUP 30MA 16LFCSP - Bulk |
| ADM8845ACP-REEL | 制造商:Analog Devices 功能描述:Charge Pump STPUP 30mA 16-Pin LFCSP EP T/R |
| ADM8845ACP-REEL7 | 制造商:Analog Devices 功能描述:Charge Pump STPUP 30mA 16-Pin LFCSP EP T/R |
| ADM8845ACPZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Charge Pump Driver for LCD White LED Backlights |
| 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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