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AME5136 Datasheet(Hoja de datos) 1 Page - Analog Microelectronics

No. de Pieza. AME5136
Descripción  Integrated White LED Driver With Organic LED Display Power Supply
Descarga  15 Pages
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Fabricante  AME [Analog Microelectronics]
Página de inicio  http://www.ame.com.tw/
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AME, Inc.
1
AME5136
Integrated White LED Driver With
Organic LED Display Power Supply
The AME5136 is a dual Boost DC/DC converter, de-
signed to drive up to 4 white LEDs with a constant cur-
rent and to power an organic LED display with a constant
voltage. According to SEL pin status, the AME5136 can
either regulates output current flowing through series con-
nected LEDs or regulate output voltage applying to OLED.
A single external resistor is used to set the maximum
LED current. The LED current can be adjusted by apply-
ing a PWM signal to the EN pin. Pulling the EN pin to
GND disables the chip and reduces the supply current to
less than 1uA. Additional features include a low-side NFET
switch that can turn off the LED string with no DC current
path to ground. Other features include OVP, OCP, UVP
and OTP.
The AME5136 is available in a small DFN-10(
3mmx3mmx0.85mm) package.
n General Description
n Features
n Applications
l Integrated OLED and White-LED Driver
l Wide Input Voltage Range: 2.7V to 5.5V
l Adjustable output voltage up to 20V
l Complete Protection: OVP, OTP, UVP
l PWM Dimming Control
l Small External Components
l Cycle-By-Cycle Current Limit
l All AME's Lead Free Products Meet RoHS
Standards
l White LED Back-Lighting
l Hand-held Devices
l Digital Cameras
l Flip-phones / Clam-shell Cellular Phones
l High-fashion cellular phones
Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB
Panel
Figure 1. Main LEDs Display and OLED SUB Display
n Typical Application
23
.
1
1
2
1
×


+
=
SUB
SUB
SUB
R
R
V
FB1
SW
GND
L
D
V
IN
AME5136
OVP
R
SUB1
R
SUB2
FB2
CH2
SEL
CH1
10
µH
Main Display
OLED
SUB
Display
0V
>1.5V
V
IN
2.7V~4.2V
C
IN
4.7
µF
EN
C
OUT1
1
µF
VFB1
R
FB1
ILED1=
0.21
R
FB1
ILED1
V
SUB
Main
47P
FB1
SW
GND
L
D
V
IN
AME5136
OVP
FB2
CH2
SEL
CH1
10
µH
Main Display
C
OUT2
1
µF
V
SUB
R
FB2
0V
>1.5V
R
FB1
C
OUT1
1
µF
C
IN
4.7
µF
V
IN
2.7V~4.2V
EN
V
FB1
V
FB2
ILED2
ILED1=
0.21
R
FB1
ILED1
ILED2=
1.23
R
FB2
V
SUB
Main




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