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LM3556 bảng dữ liệu(PDF) 2 Page - Texas Instruments

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tên linh kiện LM3556
Giải thích chi tiết về linh kiện  1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Source
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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LM3556 bảng dữ liệu(HTML) 2 Page - Texas Instruments

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background image
Top View
A1
A2
B1
B2
B3
Top View
A3
C2
C1
C3
D2
D3
A4
B4
C4
D4
D1
Pin 1A
LM3556
SNVS796C – AUGUST 2011 – REVISED APRIL 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
CONNECTION DIAGRAM
Figure 1. 16-Bump DSBGA Package YFQ16ACA
PIN DESCRIPTIONS
Pin
Name
Description
High-Side Current Source Output for Flash LED. Both bumps must be connected for proper
A1, B1
LED
operation.
Step-Up DC/DC Converter Output. Connect a 10 µF ceramic capacitor between this pin and
B2, A2
OUT
GND.
B3, A3
SW
Drain Connection for Internal NMOS and Synchronous PMOS Switches.
A4, B4
GND
Ground
C1
TEMP
Threshold Detector for LED Temperature Sensing and Current Scale Back.
Active High Hardware Torch Enable. Drive TORCH high to turn on Torch/Movie Mode. Used
C2
TORCH
for External PWM mode. Has an internal pulldown resistor of 300 k
Ω between TORCH and
GND.
Active High Hardware Flash Enable. Drive STROBE high to turn on Flash pulse. STROBE
C3
STROBE
overrides TORCH. Has an internal pulldown resistor of 300 k
Ω between STROBE and GND.
Input Voltage Connection. Connect IN to the input supply, and bypass to GND with a 10 µF or
C4
IN
larger ceramic capacitor.
Configurable Dual Polarity Power Amplifier Synchronization Input. Has an internal pulldown
D1
TX
resistor of 300 k
Ω between TX and GND.
D2
SDA
Serial Data Input/Output.
D3
SCL
Serial Clock Input.
Active High Enable Pin. High = Standby, Low = Shutdown/Reset. There is no internal
D4
ENABLE
pulldown resistor on this pin.
2
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Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: LM3556


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