XR46051IHBTR

XR46051 Product Brief Two-Step LED Current Controller Description The XR46051 is a two-step LED current controller for bulb application powered by an alternative current (AC) voltage source directly. It can drive an external N-channel power MOSFET to regulate the current flowing through a High Voltage (HV) LED string. The XR46051 works as a constant current regulator to control two-step current levels for AC step driver with simplest structure. It also provides linear type Over Temperature Protection (OTP). The PCB design can be very compact to meet various shape requirements. It is especially suitable for replacing A-series LED light bulbs and candelabra LED bulbs. Typical Application + ILED – VAC RIN1 LED1 RBL1 FEATURES ■■ Device 6V to 78V chip supply voltage range Over temperature protection Single board LED lighting solution available 3mm x 3mm TDFN-8 package ■■ System All solid state components No electrolytic capacitor required Fewer component counts and simple solution for LED lighting Scalable architecture allows optimization of performance vs. cost Driver-on-board and chip-on-board design solution available which minimize process flow and assembly cost High PF and Low THD performance Flexible PCB layout options APPLICATIONS ■■ LED Lighting Applications Downlight High bay Specialty Architectural BD Pin Configuration RIN2 RBL2 VIN GATE NC SOURCE NC GND XR46051 Q1 (NMOS) 1N60 NC LED2 VIN 1 8 GATE NC 2 7 SOURCE NC 3 6 NC GND 4 5 CS CS R1 3mm x 3mm TDFN-8L 1/2 XR46051 Product Brief Ordering Information(1) Part Number XR46051IHBTR Operating Temperature Range Lead-Free Package Packaging Method -40°C to 85°C Yes(2)) TDFN8 3 x 3 Tape and reel NOTE: 1. Refer to www.exar.com/XR46051 for most up-to-date Ordering Information. 2. Visit www.exar.com for additional information on Environmental Rating. Please contact LEDtechsupport@exar.com to request a complete datasheet. www.exar.com 48720 Kato Road Fremont, CA 94538 USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7001 Email: LEDtechsupport@exar.com Exar Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. Exar Corporation conveys no license under any patent or other right and makes no representation that the circuits are free of patent infringement. While the information in this publication has been carefully checked, no responsibility, however, is assumed for inaccuracies. Exar Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Exar Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of Exar Corporation is adequately protected under the circumstances. Reproduction, in part or whole, without the prior written consent of Exar Corporation is prohibited. Exar, XR and the XR logo are registered trademarks of Exar Corporation. All other trademarks are the property of their respective owners. ©2016 Exar Corporation XR46051_PB_110316 2/2