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LM3697YFQR データシート(PDF) 1 Page - Texas Instruments

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部品番号 LM3697YFQR
部品情報  High-Efficiency Three-String White LED Driver
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM3697YFQR データシート(HTML) 1 Page - Texas Instruments

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5.5
VIN (V)
Three String, L=22µH, 1MHz
3s3p
4s3p
5s3p
6s3p
7s3p
C049
IN
SW
HVLED1
PGND
HWEN
SDA
SCL
COUT
CIN
L
D1
PWM
OVP
VIN = 2.7V to 5.5V
VOUT up to 40V
VIN
HVLED3
HVLED2
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM3697
SNOSCS2C – NOVEMBER 2013 – REVISED OCTOBER 2015
LM3697 High-Efficiency Three-String White LED Driver
1 Features
3 Description
The
LM3697
11-bit
LED
driver
provides
high-
1
Drives Three Parallel High-Voltage LED Strings
performance backlight dimming for 1, 2, or 3 series
for Display and Keypad Lighting
LED strings while delivering up to 90% efficiency. The
High-Voltage Strings Capable of up to 40-V
boost converter with integrated 1-A, 40-V MOSFET
Output Voltage and up to 90% Efficiency
automatically adjusts to LED forward voltage to
minimize headroom voltage and effectively improve
Up to 30 mA per Current Sink
LED efficiency.
11-Bit Configurable Dimming Resolution
The LM3697 is a high-efficiency three-string power
PWM Input for Content Adjustable Brightness
source for backlight or keypad LEDs in smart-phone
Control (CABC)
handsets. The high-voltage inductive boost converter
Fully Configurable LED Grouping and Control
provides the power for three-series LED strings for
Integrated 1-A/40-V MOSFET
display backlight and keypad functions (HVLED1,
HVLED2 and HVLED3).
Adaptive Boost Output to LED Voltages
Selectable 500-kHz and 1-MHz Switching
An additional feature is a pulse width modulation
Frequency
(PWM) control input for content adjustable backlight
control, which can be used to control any high-
Four Configurable Overvoltage Protection
voltage current sink.
Thresholds (16 V, 24 V, 32 V, and 40 V)
The
LM3697
is
fully
configurable
via
an
I2C-
Overcurrent Protection
compatible interface. The device operates over a
Thermal Shutdown Protection
2.7-V to 5.5-V input voltage range and a
−40°C to
29-mm2 Total Solution Size
85°C temperature range.
2 Applications
Device Information(1)
Power Source for Smart Phone Illumination
ORDER NUMBER
PACKAGE
BODY SIZE (MAX)
LM3697YFQ
DSBGA (12)
1.64 mm x 1.29 mm
Display, Keypad and Indicator Illumination
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
space
space
Simplified Schematic
Boost Efficiency
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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