A6262 Datasheet, PDF (1/15 Pages) Allegro MicroSystems – The A6262 is a linear, programmable current regulator providing up to 100 mA from each of four outputs to drive arrays of high brightness LEDs.

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 (–40°C to 150°C)
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.
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
VIN
PWM dimming
input from LCU
On/Off
A6262
EN
LA1
SW
LA2
IREF
LA3
THTH
LA4
GND
–
A6262-DS, Rev. 4