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A6262 fiches techniques PDF

Allegro MicroSystems - Automotive LED Array Driver

Numéro de référence A6262
Description Automotive LED Array Driver
Fabricant Allegro MicroSystems 
Logo Allegro MicroSystems 





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A6262 fiche technique
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A6262
Automotive LED Array Driver
Features and Benefits
Total LED drive current up to 400 mA
Current shared equally up to 100 mA by up to 4 strings
6 to 50 V supply
Low dropout voltage
LED output short-to-ground and thermal protection
On/off toggle switch input
Enable input for PWM control
Current slew rate limit during PWM
Current set by reference resistor
Automotive K-temperature range version (–40°C to 150°C):
contact factory for availability
Applications:
Dome light, map light, space lighting,
mood lighting
Packages
10-pin MSOP with
exposed thermal pad
(suffix LY)
16-pin TSSOP with
exposed thermal pad
(suffix LP)
Not to scale
Description
TheA6262 is a linear, programmable current regulator providing
up to 100 mA from each of four outputs to drive arrays of high
brightness LEDs. The regulated LED current from each output,
accurate to 5%, is set by a single reference resistor. Current
matching in each string is better than 10% without the use of
ballast resistors. Driving LEDs with constant current ensures
safe operation with maximum possible light output.
Output control is provided by an enable input, giving direct
control for PWM applications, and by a debounced switch
input, proving an on/off toggle action.
For automotive applications, optimum performance is achieved
when driving 4 strings with 1 to 3 LEDs in each string, at a
total current of up to 100 mA in each string. Outputs can be
connected in parallel or left unused as required.
Short detection is provided to protect the LEDs and the A6262
during a short-to-ground at any LED output pin. The output
will automatically resume the regulated current when the short
is removed.
A temperature monitor is included to reduce the LED drive
current if the chip temperature exceeds an adjustable thermal
threshold.
The device packages are a 10-pin MSOP (LY) and a 16-pin
TSSOP (LP), both with exposed pad for enhanced thermal
dissipation. They are lead (Pb) free, with 100% matte tin
leadframe plating.
Typical Application Diagram
+
Automotive
12 V power net
PWM dimming
input from LCU
On/Off
VIN
A6262
EN
SW
IREF
THTH
LA1
LA2
LA3
LA4
GND
A6262-DS
Datasheet pdf - http://www.DataSheet4U.net/

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