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LM36922H Folha de dados(PDF) 10 Page - Texas Instruments

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Nome de Peças LM36922H
Descrição Electrónicos  Highly Efficient Dual-String White LED Driver
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM36922H Folha de dados(HTML) 10 Page - Texas Instruments

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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
PWM
SCL
SDA
IN
HWEN
GND
ASEL
I2C Address
Select
OVP
TSD
OCP
LED
Fault
10
LM36922H
SNVSAF2A – FEBRUARY 2016 – REVISED FEBRUARY 2016
www.ti.com
Product Folder Links: LM36922H
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The LM36922H is an inductive boost plus two current sinks white-LED driver designed for powering from one to
two 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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