AME5136 Datasheet | Analog Microelectronics

.. AME, Inc. AME5136 n General Description The AME5136 is a dual Boost DC/DC converter, designed to drive up to 4 white LEDs with a constant current 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 connected 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 applying a PWM signal to the EN pin. Pulling the EN pin to GND disables the chip and reduces the supply current to less than 1u A. 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 CIN 4.7µ F VIN OVP ILED1 CH1 VFB1 FB1 >1.5V 0V EN Main V SUB SEL GND FB2 RSUB2 CH2 47P RSUB1 OLED SUB Display AME5136 RFB1 ILED1= 0.21 R FB1 L 10µ H D Main Display COUT1 1 µF 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 plete Protection: OVP, OTP, UVP l PWM Dimming Control l Small External ponents l Cycle-By-Cycle Current Limit l All AME's Lead Free Products Meet Ro HS Standards VIN 2.7V~4.2V C IN 4.7µF  RSUB1   VSUB =  1 + R  ×1.23  SUB 2  Figure 1. Main LEDs Display and OLED SUB Display L 10 µH Main Display COUT1 1 µF SW VIN OVP ILED1 CH1 FB1 VFB1 0.21 RFB1 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 VSUB C OUT2 1 µF Main VSUB ILED2 SEL GND FB2 VFB2 RFB2 ILED2= 1.23 RFB2 Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB Panel AME, Inc. AME5136 n Function...