AME, Inc.
AME5136
n
General Description
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.
Integrated White LED Driver With
Organic LED Display Power Supply
n
Typical Application
V
IN
2.7V~4.2V
C
IN
4.7µF
V
IN
OVP
ILED1
CH1
V
FB1
FB1
>1.5V
0V
EN
Main
V
SUB
SEL
GND
FB2
R
SUB2
CH2
47P
R
SUB1
OLED
SUB
Display
AME5136
R
FB1
ILED1=
0.21
R
FB1
L 10µH
D
Main Display
C
OUT1
1µF
SW
n
Features
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
V
IN
2.7V~4.2V
C
IN
4.7µF
R
V
SUB
=
1
+
SUB
1
×
1.23
R
SUB
2
Figure 1. Main LEDs Display and OLED SUB Display
L 10µH
D
Main Display
C
OUT1
1µF
SW
V
IN
OVP
ILED1
CH1
FB1
V
FB1
0.21
R
FB1
ILED1=
R
FB1
n
Applications
l
l
l
l
l
White LED Back-Lighting
Hand-held Devices
Digital Cameras
Flip-phones / Clam-shell Cellular Phones
High-fashion cellular phones
>1.5V
0V
EN
AME5136
CH2
V
SUB
C
OUT2
1µF
Main
V
SUB
ILED2
SEL
GND
FB2
V
FB2
R
FB2
ILED2=
1.23
R
FB2
Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB
Panel
1
AME [ ANALOG MICROELECTRONICS ]
