a6260slj-t Allegro MicroSystems, Inc., a6260slj-t Datasheet

no-image

a6260slj-t

Manufacturer Part Number
a6260slj-t
Description
High Brightness Led Current Regulator
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
Features and Benefits
▪ Automotive grade
▪ LED drive current up to 350 mA
▪ 6 to 40 V supply
▪ Reverse battery protection
▪ Low drop-out voltage
▪ LED short circuit and thermal protection
▪ 10 μA maximum shutdown current
▪ PWM dimming control input
▪ Current slew rate limiting
Package: 8-pin SOIC with exposed
thermal pad (suffix LJ)
Not to scale
6260-DS, Rev. 2
12 V Power Net
Automotive
(–14 V min, 40 V max)
On-Off Control
PWM Dimming
High Brightness LED Current Regulator
7 to 20 V
and
Typical Application
EN
THTH
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.
A6260
GND
VIN
SENSE
LSS
LA
LC
A6260

Related parts for a6260slj-t

a6260slj-t Summary of contents

Page 1

Features and Benefits ▪ Automotive grade ▪ LED drive current up to 350 mA ▪ supply ▪ Reverse battery protection ▪ Low drop-out voltage ▪ LED short circuit and thermal protection ▪ 10 μA maximum shutdown ...

Page 2

... A6260 Selection Guide Part Number A6260KLJ-T 98 pieces per tube A6260KLJTR-T 3000 pieces per reel A6260SLJ-T 98 pieces per tube A6260SLJTR-T 3000 pieces per reel Absolute Maximum Ratings* Characteristic Load Supply Voltage EN Pin Voltage LA and LC Pins Voltage LSS Pin Voltage SENSE Pin Voltage ...

Page 3

... Thermal threshold input 4 EN Enable input 5 VIN Main supply 6 LA LED anode (+) connection 7 LC LED cathode (-) connection 8 LSS Low-side sense connection LA Current Limited Switch Output Monitor LC Current LSS Regulator SENSE R S Description Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 3 ...

Page 4

... I LAOC 1.0 1.2 1.4 V –1.5 –1.1 –0 105 120 ºC 110 130 150 ºC – 165 – ºC – 15 – ºC 4 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ...

Page 5

... LC , are given in the following table. The S Sense Resistor Selection D(RS (mW) (mA) (mΩ) (mW) 35 125 800 30 100 1000 25 70 1429 20 50 2000 15 35 2857 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com (1) D(RS ...

Page 6

... This condition is permitted (figure 1b) This condition is detected when , for LAOC (3 μs typical). OCD (1.1 mA typical), is SCU VIN LA LA A6260 LC LC GND (e) LA Short to LC Current remains regulated, thermal shutdown provides protection SCCR Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 6 ...

Page 7

... × 124 + THTH kΩ, is the resistor between THTH and GND. TH and reduce T THTH 110 130 (°C) Junction Temperature Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com (2) (3) . For 150 170 7 ...

Page 8

... THTH ) 5 250 × 200 150 , TH 100 Figure 3. T Jhys R pull- pull-down to GND 110 (° versus R (pull-up or –down), and THTH Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 1.4 1.3 1.2 1.1 1.0 0.9 0.8 130 150 8 ...

Page 9

... THTH LSS SENSE GND Ground (b) Switched supply plus high-side PWM source Low Voltage (>6V) Supply VIN THTH LSS SENSE GND Ground (d) Low voltage operation VIN THTH LSS SENSE GND Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 9 ...

Page 10

... The in for ma tion in clud ed herein is believed rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. ...

Related keywords