Datasheet Diodes AL5814Q — 数据表

AL5814Q
AUTOMOTIVE COMPLIANT 60V LINEAR DIMMABLE LED CONTROLLER Description Pin Assignments NEW PRODUCT The AL5814Q is an 8-terminal adjustable linear LED 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 automotive LED lighting applications. (Top View) VCC 1 REF 2 8 VFAULT 7 OUT EP
The AL5814Q 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 dropout
voltage and multiple LED channels. VSET 3 6 SFAULT GND 4 5 FB MSOP-8EP 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 AL5814Q 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 AL5814Q’s output goes low
turning off the external transistors. The device recovers 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.
AL5814Q is available in the thermally enhanced MSOP-8EP package
and is automotive-compliant, qualified to AEC-Q100 Grade 1, …