Texas Instruments TPS61050-215 Evaluation Kit TPS61050EVM-215 TPS61050EVM-215 TPS61050EVM-215 数据表
产品代码
TPS61050EVM-215
CSP-12
QFN-10
www.ti.com
FEATURES
DESCRIPTION
APPLICATIONS
VOUT
AVIN
SW
C
IN
SW
LED
PGND
PGND
P
P
P
AGND
GPIO
SDA
SCL
I2C I/F
FLASH_SYNC
L
P
TPS61050
2.2 H
m
C
10 F
OUT
m
+ BATTERY
LED ANODE
DIGIT
AL
I/O
PGND
INPUT
CAP
OUTPUT
CAP
INDUCTOR
C1
L1
C2
LED
SENSE
AGND
4.7mm
4.7 mm
PGND
SLUS525 – MARCH 2007
1.2-A HIGH POWER WHITE LED DRIVER
2-MHz SYNCHRONOUS BOOST CONVERTER WITH I
2
C COMPATIBLE INTERFACE
•
Four Operational Modes
The TPS6105x device is based on a high-frequency
synchronous-boost topology with constant current
synchronous-boost topology with constant current
–
Torch and Flash up to I
LED
= 1200 mA
sink to drive single white LEDs. The device uses an
–
Voltage-Regulated Boost Converter:
inductive fixed-frequency PWM control scheme using
4.5/5.0/5.25 V
small external components, minimizing input ripple
–
Shutdown: 0.3
µ
A (typ)
current.
•
Total Solution Circuit Area < 25 mm
2
The 2-MHz switching frequency allows the use of
•
Up to 96% Efficiency
small and low profile 2.2-
µ
H inductors. To optimize
overall efficiency, the device operates with only a
•
I
2
C-Compatible Interface up to 400 kbps
250 mV LED feedback voltage.
•
Integrated LED Turn-On 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
(TPS61052)
mode can be useful to supply other high-power
•
Integrated ADC for LED V
F
Monitoring
devices in the system, such as a hands-free audio
power amplifier, or any other component requiring a
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/Shorted LED Protection
For highest flexibility, the LED current or the desired
•
Over-Temperature Protection
output voltage can be programmed via an I
2
C
•
Available in a 12-Pin NanoFree™ (CSP) and
compatible
interface.
To
simplify
flash
synchronization with the camera module, the device
10-Pin QFN Packaging
offers a trigger pin (FLASH_SYNC) for fast LED
turn-on time.
turn-on time.
•
Camera White LED Torch/Flash for Cell
When the TPS6105x is not in use, it can be put into
Phones, Smart-Phones and PDAs
shutdown mode via the I
2
C-compatible interface,
reducing the input current to 0.3
µ
A (typ). During
•
Audio Amplifier Power Supply
shutdown, the LED pin is high impedance to avoid
leakage current through the LED.
leakage current through the LED.
Figure 1. Typical Application
Figure 2. Typical PC-Board Layout
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoFree, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.