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Description

The AL8871Q is an LED driver, controller IC for driving external MOSFETs to drive high-current LEDs. The buck-boost topology controller enables it to efficiently control the current through series-connected LEDs. The 60V capability enables it to be used in a wide range of applications and drive in excess of 15 LEDs in series.

The AL8871Q is a modified hysteretic controller using a patent-pending control scheme providing high-output current accuracy. High-accuracy dimming is achieved through DC control and high-frequency PWM control.

The AL8871Q uses two pins for fault diagnosis. A flag output highlights a fault, while the multi-level status pin gives further information on the exact fault.

The AL8871Q has been qualified to AEC-Q100 Grade 1 and is automotive compliant supporting PPAPs.

Application

• Automotive Daytime Running Lights
• Automotive Head Lamps
• Automotive Fog Lamps
• Automotive Interior Lamps

Features

• AEC-Q100 Grade 1 Qualified
• Wide Input Voltage Range: 5V to 60V
• Operating Frequency Up to 1MHz
• Analog Dimming Range: 10% to 100%
• 1000:1 PWM Dimming Resolution at 500 Hz
• High Temperature Control of LED Current Using TCTRL
• Fault Reporting for Abnormal Operations
• Overtemperature Shutdown
• Available in Thermally Enhanced TSSOP-16EP Package
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• PPAP Capable (Note 4)

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP Yes
Topologies (Buck) No
Topologies (Buck-Boost) Yes
Topologies (Boost) No
Minimum Input Voltage 5 V
Maximum Input Voltage 60 V
Maximum Output Voltage Ext MOSFET V
Maximum LED Current Ext MOSFET A
LED Current Accuracy 2 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 97 %
Operating Temperature Range -40 to 125 °C
Sense Voltage 225 mV
AEC-Q100 Grade 1

Related Content

Packages
TSSOP-16EP

Applications

Technical Documents

Recommended Soldering Techniques

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL8871QT16E-13 Digi-Key Electronics 2500 9/16/2019 Buy Now United States