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AL3644 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - DUAL 1.5A CURRENT SOURCE CAMERA FLASH LED DRIVER - Diodes

भाग संख्या AL3644
समारोह DUAL 1.5A CURRENT SOURCE CAMERA FLASH LED DRIVER
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AL3644 pdf
Typical Applications Circuit
2.5V to 5V
10mF
AL3644
1mH
SW
IN OUT
AL3644
TORCH/
TEMP
STROBE
LED1
Flash
LED
HWEN
TX
SDA
SCL
GND
LED2
Flash
LED
10mF
Pin Descriptions
Pin Number
A1
A2
A3
Pin Name
GND
IN
SDA
Type
Function
Ground
Power
Ground.
Input voltage connection. Connect IN to the input supply and bypass to GND with a 10μF or
larger ceramic capacitor.
I/O Serial data input/output in the I2C Mode on AL3644.
B1 SW Power Drain Connection for Internal NMOS and Synchronous PMOS Switches.
B2
STROBE
I/O
Active high hardware flash to enable. Drive STROBE high to turn on Flash pulse. Internal
pulldown resistor of 300kΩ between STROBE and GND.
B3
SCL
I/O Serial clock input for AL3644.
C1
OUT
Power
Step-up DC-DC converter output. Connect a 10μF ceramic capacitor between this pin and
GND.
C2
HWEN
I/O
Active high enable pin. High = Standby, Low = Shutdown/Reset. Internal pulldown resistor of
300kΩ between HWEN and GND.
C3 TORCH/TEMP I/O Torch terminal input or threshold detector for NTC temperature sensing and current scale back.
D1
LED2
Power High-side current source output for flash LED.
D2
TX
I/O
Configurable dual polarity power amplifier synchronization input. Internal pulldown resistor of
300kΩ between TX and GND.
D3
LED1
Power High-side current source output for flash LED.
AL3644
Document number: DS41558 Rev. 1 - 2
2 of 23
www.diodes.com
July 2019
© Diodes Incorporated

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डाउनलोड[ AL3644 Datasheet.PDF ]


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AL3644DUAL 1.5A CURRENT SOURCE CAMERA FLASH LED DRIVERDiodes
Diodes


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