TPS61050_15 Datasheet, PDF (1/49 Pages) Texas Instruments – High-Power White LED Driver 2-MHz Synchronous Boost Converter

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
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
•1 Four Operational Modes
– Torch and Flash up to I_LED = 1200 mA
– Voltage-Regulated Boost Converter: 4.5 V, 5
V, and 5.25 V
– Shutdown: 0.3 μA (Typical)
• Total Solution Circuit Area < 25 mm²
• Up to 96% Efficiency
• I²C-Compatible Interface up to 400 kbps
• Integrated LED Turnon Safety Timer
• Zero Latency TX-Masking Input (TPS61050)
• Hardware Voltage Mode Selection Input
(TPS61052)
• Integrated ADC for LED V_F Monitoring
• Integrated Low Light Dimming Mode
• LED Disconnect During Shutdown
• Open and Shorted LED Protection
• Overtemperature Protection
• Available in a 12-Pin NanoFree™ (CSP) and
10-Pin QFN Packaging
2 Applications
• Camera White LED Torch/Flash for Cell Phones,
Smart-Phones and PDAs
• Audio Amplifier Power Supply
Typical Application Schematic
L
2.2 mH
C_IN
P
P
I2C I/F
TPS61050
SW
SW
AVIN
VOUT
LED
SCL
SDA
GPIO
FLASH_SYNC
AGND
PGND
PGND
C_OUT
10 mF
P
P
3 Description
The TPS6105x device is based on 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 (refer
to TPS61052).
For highest flexibility, the LED current or the desired
output voltage can be programmed through an I²C
compatible interface. 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 through the I²C-compatible interface,
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)
TPS61050
TPS61052
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.
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.