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LM36922H

Texas Instruments
Part Number LM36922H
Manufacturer Texas Instruments
Description Highly Efficient Dual-String White LED Driver
Published Mar 14, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM36922H SNVSAF2A – FEBRUARY 2...
Datasheet PDF File LM36922H PDF File

LM36922H
LM36922H

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM36922H SNVSAF2A – FEBRUARY 2016 – REVISED FEBRUARY 2016 LM36922H Highly Efficient Dual-String White LED Driver 1 Features •1 1% Matched Current Sinks Across Process, Voltage, Temperature • 3% Current-Sink Accuracy Across Process, Voltage, Temperature • 11-Bit Dimming Resolution • Up to 90% Solution Efficiency • Drives from One to Two Parallel LED Strings at up to 38 V at 25 mA per String • PWM Dimming Input • I2C Programmable • Selectable 500-kHz and 1-MHz Switching Frequency With Optional –12% shift • Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz) • Four Configurable Overvoltage Protection Thresholds (17 V, 24 V, 31 V, 38 V) • Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA, 1500 mA) • Thermal Shutdown Protection • Externally Selectable I2C Address Options via ASEL Input 2 Applications • Power Source for Smart Phone and Tablet Backlighting • LCD Panels With up to 24 LEDs 3 Description The LM36922H is an ultra-compact, highly efficient, two-string white-LED driver designed for LCD display backlighting.
The device can power up to 12 series LEDs at up to 25 mA per string.
An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input.
The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.
The device operates over the 2.
5-V to 5.
5-V input voltage range and a –40°C to +85°C temperature range.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (MAX) LM36922H DSBGA (12) 1.
756 mm × 1.
355 mm (1) For all available packages, see the orderab...


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