Diodes Menu Close
Diodes Pericom: A product line of Diodes Incorporated

Description

The AL5814 is an 8-terminal adjustable linear LED driver-controller offering excellent temperature stability and output current capability. It works with a wide input voltage range from 4.5V to 60V. With an external LED driving power device, its internal power dissipation is minimized compared with traditional linear LED drivers. This makes it ideal for medium to high current LED circuits.

The AL5814 has internal output drive capability up to 15mA, which enables it to drive external Bipolar transistors or MOSFETs. It also provides the capability to drive longer LED chains with low drop-out voltage and multiple LED channels.

VSET pin is used to directly set output current feedback level. Using a resistor divider between REF pin and VSET pin, the output current can be set. Additionally, the use of an NTC resistor allows the creation of an accurate and configurable thermal fold-back behavior.

The AL5814 provides an LED-open detection feature through its VFAULT pin. If VFAULT is brought lower than 2.5V (by any one of the multiple LED channels going open) the AL5814’s output will go low turning off the external transistors. The device will recover when the open condition is removed. This ability of VFAULT to turn off the external transistors also allows PWM dimming of the LED current by adding PWM control signal on VFAULT pin.

The AL5814 uses application of power to enable the LED strings. If a separate enable pin is needed the AL5817 should be used.

The AL5814 is available in the thermally enhanced MSOP-8EP package.

Application

  • Automotive Rear Combination Light
  • LED Signs
  • Instrumentation Illumination
  • Refrigerator Lights

Features

  • Wide Input Voltage Range from 4.5V to 60V
  • Configurable LED Current Setting
  • 4% Reference Voltage Tolerance 
  • Low Temperature Drift
  • 15mA Output Drive Capability for MOSFET or Bipolar Transistor
  • LED Open Protection Detected by VFAULT Pin
  • LED Thermal Fold-back Configured by VSET
  • OverTemperature Protection (OTP)
  • Input Under Voltage Lock-Out
  • PWM Dimming Realized Through VFAULT pin

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Topology Linear Controller
Minimum Supply Voltage 4.5 V
Maximum Supply Voltage 60 V
Maximum VOUT 60 V
Number of Channels 1
LED Current Sense Voltage ADJ mV
Output Current 10 mA
LED Current EXT BJT mA
Accuracy 4 %
Dimming Analog and PWM
Temperature Range -40 to 125 °C

Related Content

Packages
MSOP-8EP

Applications

Quality & Reliability

Technical Documents

SPICE Model

SPICE Model Supporting Documents

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL5814MP-13 Arrow Electronics 621 3/26/2019 Buy Now Americas
AL5814MP-13 Digi-Key Electronics 1927 3/26/2019 Buy Now Americas
AL5814MP-13 Mouser Electronics Inc. 2116 3/26/2019 Buy Now Americas