ALED6001

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产品概述

描述

The ALED6001 is an automotive-grade (AECQ100 compliant) LED driver that combines a boost controller and high-side current sensing circuitry optimized for driving one string of high-brightness LEDs. The device is compatible with multiple topologies such as boost, SEPIC and floating load buck-boost. PWM dimming of the LED brightness is achieved by means of an external MOSFET in series with the LED string and directly driven by a dedicated pin. The pin that manages the LED current setting, usually connected to an external resistor, can also be used as analog control if a microcontroller is located in the LED module. The high-side current sensing, in combination with a P-channel MOSFET, provides effective protection in case the positive terminal of the LED string is shorted to ground. The high precision current sensing circuitry allows an LED current regulation reference within ± 4% accuracy over the entire temperature range and production spread. A fault output (open-drain) informs the host system of faulty conditions: device overtemperature, output overvoltage (disconnected LED string) and LED overcurrent.

所有功能
AECQ100 qualification

Switching controller section

5.5 V to 36 V input voltage range

Very low shutdown current: I_SHDN < 10 μA

Internal +5 V LDO for gate driver supply

Internal +3.3 V LDO for device supply

Fixed frequency peak current mode control

Adjustable (100 kHz to 1 MHz) switching frequency

External synchronization for multi-device applications

High performance external MOSFET driver

Cycle-by-cycle external MOSFET OCP

Fixed internal soft-start

Programmable output OVP

Boost, buck-boost and SEPIC topologies supported

Thermal shutdown with autorestart

Output short-circuit detection

LED control section

Up to 60 V output voltage

Constant current control loop

High-side output current sensing circuitry

30 to 300 mV differential sensing voltage

± 4% output current reference accuracy

Output overcurrent protection

Sensing resistor failure protection

PWM dimming with auxiliary series switch

Analog dimming
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