參數(shù)資料
型號(hào)： TQFN34-20
廠商： ANADIGICS, Inc.
英文描述： Four-Channel Backlight Driver with Dual LDOs
中文描述： 四通道雙LDO的背光驅(qū)動(dòng)器
文件頁(yè)數(shù)： 2/20頁(yè)
文件大?。?/td> 392K
代理商： TQFN34-20
AAT2847
Four-Channel Backlight Driver with Dual LDOs
2
2847.2007.09.1.0
Pin Descriptions
Pin #
Symbol
AAT2847-QG/QI
Function
LED2 current channel input. Connect to the cathode of backlight LED 2. If not
used, connect D2 to the OUT pin.
LED1 current channel input. Connect to the cathode of backlight LED 1. If not
used, connect D1 to the OUT pin.
Output of LDOB.
Input voltage supply connection.
Power Ground.
AAT2847-EE: Feedback pin of LDOA. Internally regulated at 1.2V.
AAT2847-QG/QI: No connection. Do not make any connection to this pin.
Output of LDOA.
Negative terminal of flying capacitor 2.
Positive terminal of flying capacitor 2.
Charge pump output to drive load circuit. Connect a 1μF or larger ceramic
capacitor between OUT and PGND.
Negative terminal of flying capacitor 1.
Positive terminal of flying capacitor 1.
AS
2
Cwire control pin for backlight LED current profile selection and control.
Enable pin for LDOB. Active logic high.
LED4 current channel input. Connect to the cathode of backlight LED 4. If not
used, connect D4 to the OUT pin.
LED3 current channel input. Connect to the cathode of backlight LED 3. If not
used, connect D3 to the OUT pin.
Ground.
Enable pin for LDOA. Active logic high.
AAT2847-EE: Feedback pin of LDOB. Internally regulated at 1.2V.
AAT2847-QG/QI: No connection. Do not make any connection to this pin.
Exposed pad (bottom).
AAT2847-EE
1
D2
D2
2
D1
D1
3
LDOB
IN
PGND
LDOB
IN
PGND
4, 6
5
7
FBA
NC
8
9
LDOA
C2-
C2+
LDOA
C2-
C2+
10
11
OUT
OUT
12
13
14
15
C1-
C1+
EN/SET
ENB
C1-
C1+
EN/SET
ENB
16
D4
D4
17
D3
D3
18
19
GND
ENA
GND
ENA
20
FBB
N/C
EP
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