LDS9003-002-T2

LDS9003 / 9001 High Power LED Temperature and PWM Controller TM with LED-Sense In-Situ LED T Sensing J FEATURES High temperature LED current de-rating and TM thermal control using the LED-Sense algorithm that directly monitors LED T junction No external thermal sensor is required Up to three temperature sensing and control channels on LDS9003 supports multi-point thermal monitoring or multi-color LED applications LDS9001 is a single channel Programmable Temp vs. PWM Duty Cycle profiles (3 for LDS9003 1 for LDS9001) Integrated PWM for dimming control of high brightness (HB) LED Drivers in logarithmic duty cycle steps from 0% to 100% (~ 0.17 dB / step) PWM Dimming Control range of 256:1 2 The LDS9003/9001 utilizes the LED-Sense I C compatible serial programming interface sensing and control algorithm that directly measures Interfaces to available high side HB LED the LED junction and controls the temperature by drivers and low cost microcontrollers closed loop adjustment of the LED Driver current via LDS9003 is available in a small footprint 2 PWM duty cycle corrections. 3 mm x 3 mm 16-pin TQFN 2 LDS9001 is in a 3 x 2 mm 8-pin DFN The control loop real-time adjusts the LED current via PWM correction codes in user programmed Look up Tables (LUTs) assigned to each sensing channel. APPLICATIONS The user programs desired correction profiles for every 5C increment from -35C to 120C. A single HB LED General Illumination Lighting sensing channel and correction LUT is available in Automotive LED Lighting the LDS900, whereas three correction profiles are available in LDS9003 to support multi-point Architectural LED Lighting temperature sensing or multi-color LED applications. DESCRIPTION Integrated PWM generators support dimming and LED temperature vs. current compensation. The The LDS9003 is a 3-channel and LDS9001 is a 1- 2 PWM duty cycle is programmable via the I C serial channel LED junction temperature monitor and interface from 0% to 100%. User-programmed 8-bit control device intended for use in high power LED codes are converted to 12-bit logarithmic steps of ~ solid state lighting applications. It connects directly to 0.17 dB per step. The PWM frequency is ~280 Hz to a LED anode and the PWM input of available high minimize noise generation. power HB drivers to real-time adjust LED current to 2 meet maximum LED temperature. A two wire I C The EN logic input functions as a chip enable. A logic HIGH applied at the EN pin allows the LDS9003 / interface allows communication to a local low cost 2 microcontroller or other remote host processor LDS9001 to respond to I C communications. An optional external serial interface address pin is device. available for use in multi-target applications. LDS9003 / 9001 can improve thermal management The device operates from 2.5 to 5.5V. of high power LED systems by controlling reliable LED junction temperature levels to meet maximum 2 The LDS9001 is available in an 8-lead 3 x 2 mm operating lifetimes. In addition, it can reduce cost by DFN package. The LDS9003 is in a 16-lead 3 x 3 allowing operation at optimal LED current/luminance 2 mm TQFN package. levels minimizing the number HB LED lamps per fixture required to meet illumination targets. 2009 IXYS Corp. 1 Doc. No. 9003/9001DS, Rev. N1.0 Characteristics subject to change without noticeLDS9003 / 9001 TYPICAL APPLICATION CIRCUITS Using LDS9003 for 3 x 3 series WLEDs Using LDS9003 for HB RGB for Projector Using LDS9001 for series WLEDs 2009 IXYS Corp. 2 Doc. No. 9003/9001DS, Rev. N1.0 Characteristics subject to change without notice