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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(qū)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)： | 5/18頁 |
| 文件大小： | 341K |
| 代理商： | ADM8845ACPZ-REEL7 |
Preliminary Technical Data
ADM8845
PIN CONFIGURATION AND FUNCTION DESCRIPTION
Table 3.
Pin
ADM8845
Mnemonic
Function
Charge Pump Output. A 2.2μF capacitor to ground is required on this pin. Connect Vout to the anodes
of all the LEDs.
2
C2+
Flying Capacitor 2 Positive Connection
Bias current set input. The current flowing through the R
SET
resistor I
SET
is gained up by 120 to give the
I
LED
curent. Connect a resistor R
SET
to GND to set the bias current as V
SET
/R
SET
. (Note: Vset = 1.18V)
LED1 Cathode connection and Charge Pump Feedback. The current flowing in LED1 is 120 times the
current flowing through R
SET
, I
SET
.
LED2 Cathode connection and Charge Pump Feedback. The current flowing in LED2 is 120 times the
current flowing through R
SET
, I
SET
. When using fewer than six LEDs this pin can be left unconnected.
LED3 Cathode connection and Charge Pump Feedback. The current flowing in LED3 is 120 times the
current flowing through R
SET
, I
SET
. When using fewer than six LEDs this pin can be left unconnected.
LED4 Cathode connection and Charge Pump Feedback. The current flowing in LED4 is 120 times the
current flowing through R
SET
, I
SET
. When using fewer than six LEDs this pin can be left unconnected.
LED5 Cathode connection and Charge Pump Feedback. The current flowing in LED5 is 120 times the
current flowing through R
SET
, I
SET
. When using fewer than six LEDs this pin can be left unconnected.
LED6 Cathode connection and Charge Pump Feedback. The current flowing in LED6 is 120 times the
current flowing through R
SET
, I
SET
. When using fewer than six LEDs this pin can be left unconnected.
10
G N D
Device Ground Pin.
11
C2
Flying Capacitor 2 Negative Connection.
Digital Input. 3 V CMOS Logic. Used with CTRL1 to control the shutdown operation of the main and sub
LEDs.
Digital Input. 3 V CMOS Logic. Used with CTRL2 to control the shutdown operation of the main and sub
LEDs.
14
C1
Flying Capacitor 1 Negative Connection.
Positive Supply Voltage Input. Connect this pin to a 2.6 V to 5.5 V supply with a 4.7μF decoupling
capacitor.
16
C1+
Flying Capacitor 1 Positive Connection.
-
EP
Expose Paddle. Connect the exposed paddle to GND.
Rev. PrJ 06/04| Page 5 of 18
1
VOUT
3
I
SET
4
FB1
5
FB2
6
FB3
7
FB4
8
FB5
9
FB6
12
CTRL2
13
CTRL1
15
Vcc
10
11
12
9
1
2
3
4
5
6
7
8
13
14
15
ADM8845
TOP VIEW
(NOT TO SCALE)
16
Figure 3. ADM8845 Pin Configuration
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
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