IK402U

TECHNICAL DATA CONSTANT CURRENT LINEAR LED DRIVER IK402U DESCRIPTION IK402U is a high-stable current source IC designed to be used as a constant currentLED driver. Application of a constant current source provides continuous brightness of LED light and long LED life time. Moreover, a constant current source provides an over-temperature protection to LED. FEATURE              High-stability output current Low dropout voltage Negative thermal coefficient of output current Small overall dimensions, possible chip mount in a single package with LED Low cost, no external elements, simple use LED drive current of 22 mA Supply voltage up to 42 V Easy paralleling of drivers to increase current Low voltage overhead of 1.2 V High current accuracy at supply voltage variation No EMI ESD Rating: Human Body Model 2000V Reduced output current at higher temperatures – negative thermal coefficient of - 0.1 %/K APPLICATION      Channel letters for advertising, LED strips for decorative lighting Aircraft, train, ship illumination Retrofits for general lighting, white goods like refrigerator lighting Medical lighting Automotive applications like CHMSL and rear combination lights SOT-23-6 IK402U MAXIMUM RATINGS Parameter Symbol Value Unit Supply voltage VS 42 V Output voltage VOUT 18.6 V Reverse voltage between all terminals VR 0.5 V Junction Temperature Tj –40…+150 °C Pmax= (VS – VOUT)  IOUTis determined by theconditionTj150°C ELECTRICAL CHARACTERISTICS ( Tj= +25°C, unless otherwise noted) Parameter Symbol Collector-emitter breakdown voltage VBR(CEO) Condition Min Typ Max Unit IC = 1 mA, IB = 0 60 – – V VS = 10 V 340 440 540 µA Supply current IS Output current IOUT VS = 10 V, VOUT = 8.6 V 19 22 24 mA Internal resistor RINT IRint = 20 mA 35 41 45 Ohm Voltage drop (VS – VE) Vdrop IC = 20 mA 0.7 0.82 0.9 V DC current gain hFE IC = 50 mA, VCE = 1 V 50 100 400 – 1.2 – V – –0.1 – %/C – 1.0 – %/V DC Characteristics with stabilized LED load Lowest sufficient battery voltage overhead VSmin IOUT> 18mA VS = 10 V, Output current change versus TA IOUT/IOUT Output current change versus VS IOUT/IOUT VS = 10 V TA = (–45C…+85C) Aug 2019, Rev. 04 2 IK402U SCHEMATIC DIAGRAM VS D1 Rint D2 R GND Bottom side IOUT IK402U APPLICATIONS INFORMATION Chip mountingarea IK402U TYPICAL REFERENCE DIAGRAMS Output Current vs.Supply Voltage Current Consumption vs. Supply Voltage Aug 2019, Rev. 04 4 IK402U Output Current vs.Ambient Temperature Aug 2019, Rev. 04 5 IK402U PACKAGE DIMENSION SOT-23-6 Aug 2019, Rev. 04 6