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LM3550SP/NOPB bảng dữ liệu(PDF) 32 Page - Texas Instruments

tên linh kiện LM3550SP/NOPB
Giải thích chi tiết về linh kiện  LM3550 5-A Super-Capacitor Flash LED Driver
PDF  43 Pages
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Trang chủ  https://www.ti.com
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LM3550SP/NOPB bảng dữ liệu(HTML) 32 Page - Texas Instruments

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Strobe
VSENSE
(50 mV/DIV)
VALD/TEMP
(500 mV/DIV)
TIME
(10 ms/DIV)
Strobe
VSENSE
(50 mV/DIV)
VALD/TEMP
(500 mV/DIV)
TIME
(10 ms/DIV)
32
LM3550
SNVS569C – MAY 2009 – REVISED OCTOBER 2016
www.ti.com
Product Folder Links: LM3550
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
The flash current drops to 70% of the peak once the voltage on the ALD/TEMP pin exceeds the sense low trip point.
Figure 52. Effect of ALD/TEMP Voltage Rising During a Flash
The flash event is not allowed to start if the voltage on ALD/TEMP is higher that the sense high trip point.
Figure 53. Effect of ALD/TEMP Voltage Dropping During a Flash
8.2.2.1.5
Thermal Protection
Internal thermal protection circuitry disables the LM3550 when the junction temperature exceeds 145°C (typical).
This feature protects the device from being damaged by high die temperatures that might otherwise result from
excessive power dissipation. The device recovers and operates normally when the junction temperature falls
below 125°C (typical). It is important that the board layout provide good thermal conduction to keep the junction
temperature within the specified operating ratings.



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