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TPS61162D_016 Fiches technique(PDF) 11 Page - Texas Instruments

No de pièce TPS61162D_016
Description  TPS61162D Dual-Channel WLED Drivers for Smart Phones
Download  31 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61162D_016 Fiches technique(HTML) 11 Page - Texas Instruments

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IFBx > VIFB_OVP for
24~32 switching
cycles?
No (caused by transient)
Yes
Normal Operation
Boost stops switching,
disable the current sink
with VIFBx < 0.5V
Another string is no
use?
Yes (single string application,
caused by transient)
Another VIFBx < 0.5V?
Yes (caused by open string or
more than two LED diodes
short in a string)
No (dual string application,
caused by transient)
No
Boost stops
switching, current
sink(s) keep on
VIFBx < VIFB_OVP_hys?
Yes (to recover boost
switching)
SW > VOVP for 16~32
switching cycles?
No
Yes
Soft Start /
Normal Operation
Latch off
11
TPS61162D
www.ti.com
SLVSC13A – JULY 2013 – REVISED MARCH 2016
Product Folder Links: TPS61162D
Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
Feature Description (continued)
Figure 6. SW OVP Protection Action
Figure 7. VIFBx OVP Protection Action
8.3.10 Overcurrent Protection
The TPS61162D has a pulse-by-pulse overcurrent limit. The boost switch turns off when the inductor current
reaches this current threshold, and it remains off until the beginning of the next switching cycle. This protects the
TPS61162D and external components under overload conditions.
8.3.11 Thermal Shutdown
An internal thermal shutdown turns off the device when the typical junction temperature of 160°C is exceeded.
The device is released from shutdown automatically when the junction temperature decreases by 15°C.


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