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A6260 Datasheet

  • A6260

  • High Brightness LED Current Regulator

  • 10頁

  • ALLEGRO   ALLEGRO

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A6260
High Brightness LED Current Regulator
Features and Benefits
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Automotive grade
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LED drive current up to 350 mA
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6 to 40 V supply
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Reverse battery protection
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Low drop-out voltage
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LED short circuit and thermal protection
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10
渭A
maximum shutdown current
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PWM dimming control input
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Current slew rate limiting
Description
The A6260 is a linear, programmable current regulator
providing up to 350 mA for driving high-brightness LEDs.
The LED current, accurate to 4%, is set by a single low-power
sense resistor. Driving LEDs with constant current ensures
safe operation with maximum possible light output.
For automotive applications, optimum performance is
achieved when driving between 1 and 3 LEDs at cur-
rents up to 350 mA.
The low dropout voltage of the A6260 allows a single white
LED to be driven safely, at full current, with a supply voltage
down to 6 V.
An enable input allows PWM dimming and can be used to
enable low-current sleep mode. The rate of change of current
during PWM switching is limited to reduce EMI.
Overcurrent detection is provided to protect the LEDs and
the A6260 during short-to-supply or short-to-ground at any
LED terminal.
The integrated temperature monitor can be used to reduce
the LED drive current if the chip temperature exceeds the
thermal limit.
The device is available in an 8-pin SOIC package with exposed
thermal pad (suffix LJ). The device is lead (Pb) free with 100%
matte-tin leadframe plating.
Package: 8-pin SOIC with exposed
thermal pad (suffix LJ)
Not to scale
Typical Application
7 to 20 V
(鈥?4 V min, 40 V max)
VIN
PWM Dimming
and
On-Off Control
Automotive
12 V Power Net
THTH
LC
LSS
SENSE
GND
LA
EN
A6260
6260-DS

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