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參數(shù)資料
| 型號： | ADM8845ACPZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顯示驅動器 |
| 英文描述： | 20-21 (9 Contact) Pin Insert; For Use With:Amphenol MIL-C-5015 97 Series Circular Connectors; No. of Contacts:9; Gender:Male; Operating Voltage:700V |
| 中文描述： | LED DISPLAY DRIVER, QCC16 |
| 封裝： | 3 X 3 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, MO-220VEED-2, LFCSP-16 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 341K |
| 代理商： | ADM8845ACPZ-REEL7 |
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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