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LM3630A Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM3630A
Spiegazioni elettronici  High-Efficiency Dual-String White LED Driver
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Homepage  http://www.ti.com
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LM3630A Scheda tecnica(HTML) 1 Page - Texas Instruments

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VOUT up to 40V
VIN
COUT
CIN
L
D1
LED1
LED2
OVP
LM3630A
GND
SW
IN
SDA
SCL
HWEN
PWM
AP
INTN
SEL
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Design
LM3630A
SNVS974B – APRIL 2013 – REVISED OCTOBER 2015
LM3630A High-Efficiency Dual-String White LED Driver
1 Features
3 Description
The LM3630A is a current-mode boost converter
1
Drives up to 2 Strings of 10 Series LEDs
which supplies the power and controls the current in
Wide 2.3-V to 5.5-V Input Voltage Range
up to two strings of 10 LEDs per string. Programming
Up to 87% Efficient
is
done
over
an
I2C-compatible
interface.
The
maximum LED current is adjustable from 5 mA to
8-bit I2C-Compatible Programmable Exponential
28.5 mA. At any given maximum LED current the
or Linear Brightness Control
LED
brightness
is
further
adjusted
with
256
PWM Brightness Control for CABC Operation
exponential or linear dimming steps. Additionally,
Independent Current Control per String
pulsed width modulation (PWM) brightness control
can be enabled allowing for LED current adjustment
True Shutdown Isolation for LEDs
by a logic level PWM signal.
Internal Soft-Start Limits Inrush Current
The boost switching frequency is programmable at
Adaptive Headroom
500 kHz for low switching loss performance or 1 MHz
Programmable 16-V/24-V/32-V/40-V Overvoltage
to allow the use of tiny low-profile inductors. A setting
Protection
for a 10% offset of these frequencies is available.
Selectable Boost Frequency of 500 kHz or 1 MHz
Overvoltage protection is programmable at 16 V,
with Optionally Additional Offset
24 V, 32 V, or 40 V to accommodate a wide variety of
LED
configurations
and
Schottky
diode/output
Low Profile 12-Pin DSBGA Package
capacitor combinations.
Solution Size 32 mm²
The device operates over a 2.3-V to 5.5-V operating
voltage
range
and
–40°C
to
+85°C
ambient
2 Applications
temperature range. The LM3630A is available in an
Smart-Phone LCD Backlighting
ultra-small 12-bump DSBGA package.
LCD and Keypad Lighting
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (MAX)
LM3630A
DSBGA (12)
1.94 mm × 1.42 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
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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