TPS61310_12 Datasheet, PDF (1/57 Pages) Texas Instruments – 1.5A Multiple LED Camera Flash and Video Light Driver With I2CTM Compatible Interface

TPS61310, TPS61311
www.ti.com
SLVS978C – MARCH 2010 – REVISED NOVEMBER 2012
1.5A Multiple LED Camera Flash and Video Light Driver With I²C^TM Compatible Interface
Check for Samples: TPS61310, TPS61311
FEATURES
1
•23 Operational Modes:
– Video Light and Flash Strobe
– Voltage Regulated Converter: 3.8V...5.7V
with Down Mode
– Standby: 2μA (typ.)
• LED V_F Measurement
• Power-Save Mode for Improved Efficiency at
Low Output Power, Up to 95% Efficiency
• I²C Compatible Interface up to 3.4Mbits/s
• Dual Wire Camera Module Interface
• Zero Latency Tx-Masking Input
• Hardware Reset Input
• Privacy Indicator LED Output
• GPIO/Power Good Output
• Various Safe Operation and Robust Handling
Features:
– LED Temperature Monitoring
– Open/Short LED Detection/Protection
– Integrated LED Safety Timer
– Automatic Battery Voltage Droop
Monitoring and Protection
– Smooth LED Current Ramp-Up/Down
– Undervoltage Lockout
• Total Solution Size of Less Than 25mm²
• Available in a 20-Pin NanoFree™ (CSP)
APPLICATIONS
• Single/Dual/Triple White LED Flash Supply for
Cell Phones and Smart-Phones
• Video Lighting for Digital Video Applications
• General Lighting Applications
• Audio Amplifier Power Supply
DESCRIPTION
The TPS6131x family is an integrated solution with a
wide feature set for driving up to three LEDs for still-
camera flash strobe and video-camera lighting
applications. It is based on a high efficiency
synchronous boost topology with combinable current
sinks to drive up to three white LEDs in parallel. The
2MHz switching frequency allows the use of small
and low-profile 2.2μH inductors. To optimize overall
efficiency, the device operates with a low LED-
feedback voltage and regulated output-voltage
adaptation.
The device integrates a control scheme that
automatically optimizes the LED current flash budget
as a function of the battery voltage condition.
The TPS6131x not only operates as a regulated
current source, but also as a standard voltage boost
regulator. The device enters power-save mode
operation at light load currents to maintain high
efficiency over the entire load current range. These
operating modes can be useful to supply other high
power devices in the system (e.g. hands-free audio
PA).
To simplify video light and flash synchronization with
the camera module, the device offers a dedicated
control interface (STRB0, STRB1) for zero latency
LED turn-on time.
TPS61310
2.5 V..5.5 V
CI
4.7 mF
L
2.2 mH
SW
SW
AVIN
VOUT
CO
10 mF
D1
D2
I²C I/F
NTC
NRESET
STRB0
STRB1
SCL
SDA
LED1
LED2
LED3
INDLED
Tx-MASK
TS
AGND
AGND
GPIO/PG
PGND
PGND
Privacy
Indicator
Figure 1. Typical Application
1
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.
NanoFree is a trademark of Texas Instruments.
2
I²C is a trademark of NXP Semiconductors.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2012, Texas Instruments Incorporated