参数资料
型号: AS1344-BTDT
厂商: AUSTRIAMICROSYSTEMS AG
元件分类: DC/DC变换器
英文描述: 42V DCDC for OLED; Package Type: TDFN(3x3)-10
封装: TDFN(3x3)-10
文件页数: 13/19页
文件大小: 1807K
代理商: AS1344-BTDT
www.austriamicrosystems.com
Revision 1.05
13 - 19
AS1344
Datasheet - Application Information
LED Power Supply Application
The AS1344 can also be used for driving LEDs. Just simply connect the LEDs between the pins V
OUT
and FB.
(see
Figure 36)
.
Figure 36. LED Supply Application
The output voltage is adjusted automatically to the required voltage of the LEDs. This voltage depends on the forward
voltage (V
F
) of the used LEDs and the Feeback Voltage V
FB
.
Calculate V
OUT
by:
Note:
The brightness of the LEDs can directly be adjusted by setting the current I
LED
via the corresponding R
2
.
Calculate R
2
by:
Where:
V
FB
= 1.25V
n .... number of LEDs
R
V
1
EN
3
GND
4
V
CC
10
FB
6
LX
On
Off
AS1344
L
1
6.8μH
C
1
10μF
V
CC
= 0.9V
to 3.6V
D1
C
OUT
4.7μF
R
2
100
Ω
7
SWOUT
5
PGND
9
VOUT
2
POK
R
3
100k
Ω
I
LED
8
VIN
(EQ 4)
V
OUT
V
F
I
LED
(
)
n
×
V
FB
+
=
(EQ 5)
I
LED
R
2
----------
=
相关PDF资料
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AS1351-T Dual LDO with OTP 1.8 to 3.3V; Package Type: QFN(3x3)-12; Output Range: 2 x 3,3V
AS1352-7BC0-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2,5V; Output Range: 2,9V; Output Range: 3,0V
AS1352-C0CF-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2 x 3,0V; Output Range: 3,3V
AS1352-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 4 x 3,3V
AS1352V-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(3x3)-16; Output Range: 4 x 3,3V
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