AP3036KTR-G1 Diodes Incorporated

NOT RECOMMENDED FOR NEW DESIGN USE AP3036B AP3036/A WHITE LED STEP-UP CONVERTER Description Pin Assignments The AP3036/A is an inductor-based DC/DC converter designed to (Top View) drive up to eight white LEDs in series for backlight. Only one Pin 1 Mark feedback resistor is needed to control the LED current and obtain required brightness. 6 SW 1 VIN A constant frequency 1.0MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall inductor and 0.22 F output capacitor for a GND 2 5 VOUT typical application is sufficient. Additionally, the Schottky diode in boost circuit is integrated on this chip. The AP3036/A also provides a FB 3 4 CTRL disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3036/A. SOT-23-6 When any LED is broken or in other abnormal conditions, the output voltage will be clamped. (Top View) The AP3036/A is available in standard SOT-23-6 and TSOT-23-6 Pin 1 Mark packages. Features SW 1 6 VIN Inherently Uniform LED Current High Efficiency up to 84% GND 2 5 VOUT No Need for External Schottky Diode Output Over-voltage Protection (OVP) FB 3 4 CTRL Fixed 1.0MHz Switching Frequency Uses Tiny 1mm Tall Inductor Requires Only 0.22 F Output Capacitor TSOT-23-6 High Frequency Dimming Control Applications Cellular Phones Digital Cameras LCD Modules GPS Receivers PDAs, Handheld Computers 1 of 13 AP3036/A April 2018 Diodes Incorporated www.diodes.com Document number: DS40923 Rev. 1 - 3 NOT RECOMMENDED FOR NEW DESIGN AP3036/A USE AP3036B Typical Applications Circuit (Note 1) V 3V L 2 2 IN 1 5 6 SW VOUT C VIN OUT Control 0.22 F AP3036/A Signal 4 3 CTRL FB GND C IN 10 2 1 F Note 1. C: X5R or X7R type dielectric, L: SUMIDA CDRH5D28R-220NC or equivalent. And, this circuit can work in full temperature. Pin Description Pin Number Pin Name Function 1 SW Switch pin. Connect external inductor 2 GND Ground 3 FB Voltage feedback pin. The reference voltage is 200mV for AP3036 and 250mV for AP3036A Shutdown and dimming pin. Connect to 1.8V or higher to enable device Connect to 0.4V or less to 4 CTRL disable device Connect to a PWM signal to achieve LEDs brightness dimming 5 VOUT Output pin. Connect to the cathode of internal Schottky diode 6 VIN Input supply pin. Must be connected to a local bypass capacitor 2 of 13 AP3036/A April 2018 Diodes Incorporated www.diodes.com Document number: DS40923 Rev. 1 - 3