ADT7110 Datasheet | ADTech

General Description The ADT7110 is a fixed frequency step-down converter designed to drive Infrared LEDs in the CCD camera module application. And internal current limit circuit protect external devices. 1 2 3 Package outline of the ADT7110 6 5 A11 4 Features - Input voltage range : 10.5V to 15V - Current mode PWM controller with integrated pensation ponents - 350m A output load current available - Built-in chip enable/disable function - Built-in current limit protection - 500k Hz fixed frequency internal oscillator Applications - Infrared LED driver for CCD camera - Small outline SOT-26 package (2.9mm x 1.6mm body) Typical Application Circuit VOUT VIN C2 A11 GND RFB2 RFB1a L1 RFB1b C1 RFB1c RFB1d RFB1e RLED5 RLED6 RLED4 RLED3 RLED2 RLED1 RFB1f U1 - This specifications are subject to be changed without notice Jun. 07. 2008 / Rev. 0.1 .Data Sheet.in 1/8 http://.ad-tech.co.kr Part List ponent U1- 1 L1 C1 C2 RSE RLED1 ~ RLED6- 2 Description posite type with a PNP transistor and schottky barrier diode Output filter inductor Output filter capacitor Bypass capacitor Current sense resistor LED current ballast resistor Buck converter feedback loop ponent Buck converter feedback loop ponent IC Chip inductor Tantalum capacitor Tantalum capacitor Chip resistor Chip resistor , 1% Chip resistor Chip resistor , 1% Type FP103 47u H/590m A 47u F/16V 10u F/25V 0.1Ω 4.0Ω 120㏀ (table 3) 68㏀ (table 2) Value RFB1a ~ RFB1f RFB2- 3 - 1 : For cost down , it is possible to use discrete ponent with a PNP transistor and a schottky barrier diode. In this case, you make use the discrete ponents with proper electrical specification. Table A shows the required key electrical limits. It is remended to use PNP and schottky barrier diode having equivalent specification in the Table A. - 2, - 3 : To setting appropriate LED current, Refer to ‘Application Hints’. Table A : Selection guide for the discrete...