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TPS61050 Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS61050
Description  1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS61050 Datasheet(HTML) 5 Page - Texas Instruments

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DEVICE INFORMATION
I2C TIMING DIAGRAMS
tf
tLOW
tr
thd;STA
thd;DAT
tsu;DAT
tf
HIGH
tsu;STA
S
Sr
P
S
thd;STA
tr
tBUF
tsu;STO
SDA
SCL
PIN ASSIGMENTS
TPS61050
TPS61052
SLUS525 – MARCH 2007
Figure 3. Serial Interface Timing for F/S-Mode
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NO.
NO.
NAME
(QFN)
(CSP)
AVIN
5
D3
I
This is the input voltage pin of the device. Connect directly to the input bypass capacitor.
VOUT
9
A2
O
Boost converter output.
LED
6
D2
I
LED return input. This feedback pin regulates the LED current through the internal sense
resistor by regulating the voltage across it. The regulation operates with typically 250 mV
dropout voltage. Connect to the cathode of the LED.
FLASH_SYNC
10
A1
I
Flash strobe pulse synchronization input.
FLASH_SYNC = LOW (GND): The device is operating and regulating the LED current to
the torch current level (TC).
FLASH_SYNC = HIGH (VIN): The device is operating and regulating the LED current to
the flash current level (FC).
SCL
2
B3
I
Serial interface clock line. This pin must not be left floating and must be terminated.
SDA
1
A3
I/O
Serial interface address/data line. This pin must not be left floating and must be terminated.
GPIO
3
C3
I/O
General purpose input/output (refer to REGISTER2). This pin can either be configured as a
logic input or as an open-drain output (TPS61050).
ENVM
3
C3
I
Enable pin for voltage mode boost converter (TPS61052).
SW
8
B1, B2
I/O
Inductor connection. Drain of the internal power MOSFET. Connect to the switched side of
the inductor. SW is high impedance during shutdown.
PGND
7
C1, C2
Power ground. Connect to AGND underneath IC.
AGND
4
D1
Analog ground.
PowerPAD™
N/A
Internally connected to PGND.
5
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