TPS61054_15 Datasheet, PDF (1/30 Pages) Texas Instruments – High-Power White LED Driver 2-mHz Synchronous Boost Converter

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TPS61054, TPS61055
SLUS760B – SEPTEMBER 2007 – REVISED SEPTEMBER 2015
TPS6105x High-Power White LED Driver
2-mHz Synchronous Boost Converter With Standard Logic Interface
1 Features
•1 Four Operational Modes
– Torch and Flash up to I_LED = 700 mA
– Voltage-Regulated Boost Converter: 5.0 V
– Shutdown: 0.3 μA (Typical)
• Total Solution Circuit Area < 25 mm²
• Up to 96% Efficiency
• Integrated LED Turnon Safety Timer
• Zero Latency TX-Masking Input
• Integrated Low Light Dimming Mode
• LED Disconnect During Shutdown
• Open/Shorted LED Protection
• Over-Temperature Protection
• Available in a 12-Pin NanoFree™ (CSP) and 10-
Pin VSON Packaging
2 Applications
• Camera White LED Torch or Flash for Cell
Phones, Smartphones and PDAs
• General Lighting Applications
• Audio Amplifier Power Supply
3 Description
The TPS6105x device uses a high-frequency
synchronous-boost topology with constant current
sink to drive single white LEDs. The device uses an
inductive fixed-frequency PWM control scheme using
small external components, minimizing input ripple
current.
The 2-MHz switching frequency allows the use of
small and low-profile 2.2-μH inductors. To optimize
overall efficiency, the device operates with only a
250-mV LED feedback voltage.
The TPS6105x device not only operates as a
regulated current source, but also as a standard
voltage-boost regulator. This additional operating
mode can be useful to supply other high-power
devices in the system, such as a hands-free audio
power amplifier, or any other component requiring a
supply voltage higher than the battery voltage.
The LED current or the desired output voltage can be
programmed through two logic signals (MODE0/1).
To simplify flash synchronization with the camera
module, the device offers a trigger pin
(FLASH_SYNC) for fast LED turnon time.
When the TPS6105x is not in use, it can be put into
shutdown mode, reducing the input current to 0.3 μA
(typical). During shutdown, the LED pin is high
impedance to avoid leakage current through the LED.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61054,
TPS61055
VSON (10)
DSBGA (12)
3.00 mm × 3.00 mm
1.96 mm × 1.46 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
L
2.2 mH
C_IN
P
P
TPS61054
SW
SW
AVIN
VOUT
LED
MODE1
MODE0
Tx-TOFF
FLASH_SYNC
AGND
PGND
PGND
C_OUT
10 mF
P
P
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.