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LM3644TTYFFR Folha de dados(PDF) 3 Page - Texas Instruments

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Nome de Peças LM3644TTYFFR
Descrição Electrónicos  Dual 1.5A Current Source Camera Flash LED Driver
Download  41 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM3644TTYFFR Folha de dados(HTML) 3 Page - Texas Instruments

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background image
Top View
A1
A2
B1
B2
B3
Top View
A3
C2
C1
C3
D2
D3
D1
Pin A1
LM3644, LM3644TT
www.ti.com
SNVSA52D – AUGUST 2014 – REVISED SEPTEMBER 2015
6 Pin Configuration and Functions
YFF Package
12-Pin DSBGA
Pin Functions
PIN
TYPE
DESCRIPTION
NUMBER
NAME
A1
GND
Ground
Ground
Input voltage connection. Connect IN to the input supply and bypass to GND with a 10-µF or
A2
IN
Power
larger ceramic capacitor.
A3
SDA
I/O
Serial data input/output in the I2C Mode on LM3644.
B1
SW
Power
Drain Connection for Internal NMOS and Synchronous PMOS Switches.
Active high hardware flash enable. Drive STROBE high to turn on Flash pulse. Internal pulldown
B2
STROBE
I/O
resistor of 300 k
Ω between STROBE and GND.
B3
SCL
I/O
Serial clock input for LM3644.
C1
OUT
Power
Step-up DC-DC converter output. Connect a 10-µF ceramic capacitor between this pin and GND.
Active high enable pin. High = Standby, Low = Shutdown/Reset. Internal pulldown resistor of 300
C2
HWEN
I/O
k
Ω between HWEN and GND.
TORCH/T
C3
I/O
Torch terminal input or threshold detector for NTC temperature sensing and current scale back.
EMP
D1
LED2
Power
High-side current source output for flash LED.
Configurable dual polarity power amplifier synchronization input. Internal pulldown resistor of 300
D2
TX
I/O
k
Ω between TX and GND.
D3
LED1
Power
High-side current source output for flash LED.
Copyright © 2014–2015, Texas Instruments Incorporated
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Product Folder Links: LM3644 LM3644TT


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