AL5873
55V/250mA THREE-CHANNEL LINEAR LED DRIVER
Description
Pin Assignments
The AL5873 is a three-channel linear LED driver with PWM dimming
and analog dimming control. Each channel can drive up to 250mA
with a total driving current up to 750mA. The LED channel current of
the AL5873 can be set through two reference resistors connected to
the REF1 and REF2 pins.
TSSOP-16EP (Type DX)
VIN
NC
FAULTB
ADIM
REF1
FULL
REF2
LED1
LED2
LED3
1
2
3
4
16
15
14
13
12
11
10
9
PWM
NC
The AL5873 regulates LED current for each channel, accurate down
to ±4%, with excellent dimming performance. The AL5873 enters
EP
NC
5
6
7
standby mode to save power if no PWM signal is detected.
GND
GND
GND
The AL5873 monitors the temperature and reduces the LED current if
the chip temperature exceeds the threshold temperature. Moreover,
the input under voltage lock-out (UVLO), LED string open/short
protection, over temperature protection (OTP), and fault indicator
(FAULTB) are designed to improve system robustness.
8
Top View
The AL5873 is available in TSSOP-16EP (Type DX) package.
Features
Applications
Wide Input Voltage Range from 5V to 55V
Each Channel up to 250mA Current Capability
Set Stop and Tail Current Independently Through Two Resistors
Switch LED Current Between Stop and Tail Function
Automatically via FULL Input
Automotive aftermarket LED inner lamps
Aftermarket rear lights – tail and stop lights, rear turn indicators,
parking lights, fog lights, reverse lights
PWM Dimming via Both PWM Input and Power Supply
Analog Dimming via ADIM Input
Automatically Enter and Exit Standby Mode Without Enable Pin
Internal Protections:
.
.
.
.
Input Under Voltage Lock-Out (UVLO)
LED String Open Protection
LED String Short Protection
Over Temperature Protection (OTP)
Thermal Fold-Back if Chip Temperature Exceeds the Threshold
Fault Reporting: UVLO, OTP, LED Open, and LED Short
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
For automotive applications requiring specific change
control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP
capable, and manufactured in IATF 16949 certified facilities),
please contact us or your local Diodes representative.
https://www.diodes.com/quality/product-definitions/
An Automotive-Compliant Part is Available Under Separate
Datasheet (AL5873Q)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
1 of 16
www.diodes.com
March 2022
© Diodes Incorporated
AL5873
Document number: DS44751 Rev. 1 - 2
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