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TPS61050 Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza TPS61050
Descripción Electrónicos  High-Power White LED Driver 2-MHz Synchronous Boost Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS61050 Datasheet(HTML) 1 Page - Texas Instruments

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VOUT
AVIN
SW
C
IN
SW
LED
PGND
PGND
P
P
P
AGND
GPIO
SDA
SCL
I2CI/F
FLASH_SYNC
L
P
TPS61050
2.2 H
m
C
10 F
OUT
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TPS61050, TPS61052
SLUS525A – MARCH 2007 – REVISED SEPTEMBER 2015
TPS6105x 1.2-A High-Power White LED Driver
2-MHz Synchronous Boost Converter With I2C Compatible Interface
1 Features
3 Description
The TPS6105x device is based on a high-frequency
1
Four Operational Modes
synchronous-boost topology with constant current
Torch and Flash up to ILED = 1200 mA
sink to drive single white LEDs. The device uses an
Voltage-Regulated Boost Converter: 4.5 V, 5
inductive fixed-frequency PWM control scheme using
V, and 5.25 V
small external components, minimizing input ripple
current.
Shutdown: 0.3
μA (Typical)
The 2-MHz switching frequency allows the use of
Total Solution Circuit Area < 25 mm2
small and low profile 2.2-
μH inductors. To optimize
Up to 96% Efficiency
overall efficiency, the device operates with only a
I2C-Compatible Interface up to 400 kbps
250-mV LED feedback voltage.
Integrated LED Turnon Safety Timer
The TPS6105x device not only operates as a
Zero Latency TX-Masking Input (TPS61050)
regulated current source, but also as a standard
Hardware Voltage Mode Selection Input
voltage-boost regulator. This additional operating
mode can be useful to supply other high-power
(TPS61052)
devices in the system, such as a hands-free audio
Integrated ADC for LED VF Monitoring
power amplifier, or any other component requiring a
Integrated Low Light Dimming Mode
supply voltage higher than the battery voltage (refer
LED Disconnect During Shutdown
to TPS61052).
Open and Shorted LED Protection
For highest flexibility, the LED current or the desired
Overtemperature Protection
output voltage can be programmed through an I2C
compatible
interface.
To
simplify
flash
Available in a 12-Pin NanoFree™ (CSP) and
synchronization with the camera module, the device
10-Pin QFN Packaging
offers a trigger pin (FLASH_SYNC) for fast LED
turnon time.
2 Applications
When the TPS6105x is not in use, it can be put into
Camera White LED Torch/Flash for Cell Phones,
shutdown mode through the I2C-compatible interface,
Smart-Phones and PDAs
reducing the input current to 0.3
μA (typical). During
Audio Amplifier Power Supply
shutdown, the LED pin is high impedance to avoid
leakage current through the LED.
Typical Application Schematic
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
VSON (10)
3.00 mm × 3.00 mm
TPS61050
TPS61052
DSBGA (12)
1.96 mm × 1.46 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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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