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TPS61300YFFR Datasheet(PDF) 33 Page - Texas Instruments

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No. de pieza TPS61300YFFR
Descripción Electrónicos  TPS6130xx 1.5-A and 4.1-A Multiple LED Camera Flash Driver With I2C Compatible Interface
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS61300YFFR Datasheet(HTML) 33 Page - Texas Instruments

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FLASH _SYNCor (SFT )
LEDCONTROL
TIMER
STIM
TIME-OUT RESET (SF)
FLASH
DCLIGHT
FLASH_SYNCor (SFT)
TIMER
STIM
LEDCONTROL
TIME-OUT RESET (SF)
FLASH
DCLIGHT
FLASH
FLASH_SYNC
FREE
FREE
I2CBus
LEDCurrent
DC/DC Turn-OnCommand
MODE_CTRL [1:0]= “10"
DC/DC Turn-OffCommand
MODE_CTRL [1:0]= “00"
DCLIGHT
FREE
FREE
FREE
I2CBus
LEDCurrent
LED Turn-OnCommand
MODE_CTRL [1:0]= “01"
LED Turn-OffCommand
MODE_CTRL[1:0]= “00"
33
TPS61300, TPS61301
TPS61305, TPS61305A, TPS61306
www.ti.com
SLVS957E – JUNE 2009 – REVISED APRIL 2016
Product Folder Links: TPS61300 TPS61301 TPS61305
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Copyright © 2009–2016, Texas Instruments Incorporated
8.4.5 Flash Strobe is Level Sensitive (STT = 0): LED Strobe Follows FLASH_SYNC Input
FLASH_SYNC and (SFT) = 0: LED operation is set to the DC light current level. To avoid device shutdown by
DC light safety timeout, MODE_CTRL[1:0] must be refreshed within less than 11.2 s.
FLASH_SYNC or (SFT) = 1: The LED is driven at the flashlight current level and the safety timer is running. The
maximum duration of the flashlight pulse is defined in the STIM[2:0] register.
Figure 46. DC Light Operation
Figure 47. Synchronized Flashlight Strobe
Figure 48. Level Sensitive Safety Timer
(Timeout)
Figure 49. Level Sensitive Safety Timer
(Normal Operation + Timeout)
The safety timer is started by:
a rising edge of FLASH_SYNC signal.
a rising edge of START_FLASH/TIMER (SFT) bit.
The safety timer is stopped by:
a low level of FLASH_SYNC signal or START_FLASH/TIMER (SFT) bit.
a timeout signal (TO).
START-FLASH/TIMER (SFT) bit is being reset by the timeout (TO) signal.
8.4.6 Flash Strobe Is Leading Edge Sensitive (STT = 1): One-Shot LED Strobe
When FLASH_SYNC and START_FLASH/TIMER (SFT) are both low the LED operation is set to the DC Light
current level. To avoid device shutdown by DC light safety timeout, MODE_CTRL[1:0] needs to be refreshed
within less than 11.2 s.
The duration of the flashlight pulse is defined in the STIM register. The flashlight strobe is started by:
a rising edge of START_FLASH/TIMER (SFT) bit.
a rising edge of FLASH_SYNC signal.
Once running, the timer ignores all kind of triggering signal and only stops after a timeout (TO). START-
FLASH/TIMER (SFT) bit is being reset by the timeout (TO) signal.


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