PCN20070608

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, O
      l   PWM Dimming Control
      l   Small External Components
      l   Cycle-By-Cycle Current Limit
      l   All AME's Lead Free Products Meet RoH
           Standards


Application

    l White LED Back-Lighting
    l Hand-held Devices
    l Digital Cameras
    l Flip-phones / Clam-shell Cellular Phon
    l High-fashion cellular phones


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 of AME5136 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 1mA. 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.