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參數(shù)資料
| 型號(hào)： | AAT1236IRN-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | High Efficiency White LED Drivers for Backlight and Keypad |
| 中文描述： | 高效率白光LED的背光和鍵盤驅(qū)動(dòng)程序 |
| 文件頁數(shù)： | 2/24頁 |
| 文件大?。?/td> | 1009K |
| 代理商： | AAT1236IRN-T1 |
AAT1236
High Efficiency White LED Drivers
for Backlight and Keypad
2
1236.2007.02.1.1
Pin Descriptions
Pin Configuration
TDFN34-16
(Top View)
EN
B1
B2
VIN
OV
3
RSET
IN
GND
A2
A3
AGND
SCL
SDA
SW
LIN
A1
4
5
1
2
6
7
8
14
13
12
16
15
11
10
9
Pin #
Symbol
Function
1
2
VIN
OV
Input supply for the converter. Connect a 2.2μF or larger ceramic capacitor from VIN to GND.
Boost output over voltage detect pin. Use resistor divider to set the circuit's external over-
voltage protection. See Applications Information for details.
Enable pin.
Backlight current sink 1. Connect the cathode of the last LED in the string to B1.
Backlight current sink 2. Connect the cathode of the last LED in the string to B2.
LED current set resistor. A 22.6k
Ω
resistor from RSET to AGND sets the maximum LED cur-
rent in A1-A3 and B1-B2 to 20mA.
Input bias supply for the internal circuitry. Connect IN to VIN directly at the AAT1236.
Power ground for the boost converter. Connect GND to AGND at a single point as close to
the AAT1236 as practical.
Boost converter switching node. A 2.2μH inductor, connected between SW and LIN, sets the
boost converter's switching frequency.
I
2
C interface serial data line.
I
2
C interface serial clock line.
Ground pin. Connect AGND to GND at a single point as close to the AAT1236 as practical.
Auxiliary current sink 3. Connect the cathode of the last LED in the string to A3.
Auxiliary current sink 2. Connect the cathode of the last LED in the string to A2.
Auxiliary current sink 1. Connect the cathode of the last LED in the string to A1.
Switched power input. Connect LIN to the external power inductor.
Exposed paddle (bottom). Connected internally to SW. Connect to SW or leave floating.
3
4
5
6
EN
B1
B2
RSET
7
8
IN
GND
9
SW
10
11
12
13
14
15
16
EP
SDA
SCL
AGND
A3
A2
A1
LIN
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