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LM36923HYFFR Scheda tecnica(PDF) 10 Page - Texas Instruments |
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LM36923HYFFR Scheda tecnica(HTML) 10 Page - Texas Instruments |
10 / 47 page Current Sinks Boost Control Overvoltage Protection 17V 24V 32V 38V PWM Sample Rate 800kHz 4MHz 24MHz PWM Sampler I2C Interface Boost Switching Frequency 1MHz 800kHz 500kHz 400kHz 250kHz 200kHz LED Current Mapping Exponential Linear LED Current Ramping No ramp 0.125ms/step 0.25ms/step 0.5ms/step 1ms/step 2ms/step 4ms/step 8ms/step 16ms/step Min Headroom Select Adaptive Headroom Fault Detection Overvoltage LED String Short LED String Open Current Limit Thermal Shutdown Thermal Shutdown 135 oC 0.29 Ÿ Auto Frequency Mode Boost Current Limit 750mA 1000mA 1250mA 1500mA 11 Bit Brightness Code LED String Enables SW OVP LED1 LED2 LED3 PWM SCL SDA IN HWEN GND ASEL I2C Address Select OVP TSD OCP LED Fault 10 LM36923H SNVSAF3A – FEBRUARY 2016 – REVISED FEBRUARY 2016 www.ti.com Product Folder Links: LM36923H Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 7 Detailed Description 7.1 Overview The LM36923H is an inductive boost plus three current sinks white-LED driver designed for powering from one to three strings of white LEDs used in display backlighting. The device operates over the 2.5-V to 5.5-V input voltage range. The 11-bit LED current is set via an I2C interface, via a logic level PWM input, or a combination of both. 7.2 Functional Block Diagram |
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