AME5136 Datasheet, PDF (1/15 Pages) Analog Microelectronics – Integrated White LED Driver With Organic LED Display Power Supply

AME, Inc.
AME5136
Integrated White LED Driver With
Organic LED Display Power Supply
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.
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
n Applications
l White LED Back-Lighting
l Hand-held Devices
l Digital Cameras
l Flip-phones / Clam-shell Cellular Phones
l High-fashion cellular phones
n Typical Application
V _IN
2.7V~4.2V
C_IN
4.7µF
L 10µH
D
SW
V_IN
OVP
Main Display
C_OUT1
1 µF
CH1
>1.5V
0V
Main
FB1
AME5136
EN
CH2
V_SUB
SEL
FB2
GND
ILED1
VFB1
ILED1=
R_FB1
0.21
R
FB1
47P
R
SUB1
R_SUB2
OLED
SUB
Display
V_SUB
=
^{1 +}
R_SUB1
R_{SUB 2}
 ^×1.23
Figure 1. Main LEDs Display and OLED SUB Display
V_IN
2.7V~4.2V
C_IN
4.7µF
L 10µH
SW
V_IN
D
OVP
Main Display
C_OUT1
1µF
>1.5V
0V
CH1
FB1
AME5136
EN
CH2
Main
V_SUB
SEL
FB2
GND
ILED1
V_FB1
ILED1=
R _FB1
0.21
R_FB1
V_SUB
C _OUT2
1µF
ILED2
V_FB2
1.23
ILED2=
R_FB2
R_FB2
Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB
Panel
1