ALED6001 STMicroelectronics

ALED6001 Automotive PWM-dimmable single channel LED driver with integrated boost controller Datasheet - production data Applications Automotive exterior lighting Daytime running lights High and low beam lights TSSOP-16 Fog lights Position lights / blinkers Features Description AECQ101 qualified The ALED6001 is an automotive-grade Switching controller section (AECQ100 compliant) LED driver that combines a 5.5 V to 36 V input voltage range boost controller and high-side current sensing Very low shutdown current: I < 10 A SHDN circuitry optimized for driving one string of high- Internal +5 V LDO for gate driver supply brightness LEDs. The device is compatible with multiple topologies such as boost, SEPIC and Internal +3.3 V LDO for device supply floating load buck-boost. PWM dimming of the Fixed frequency peak current mode control LED brightness is achieved by means of an Adjustable (100 kHz to 1 MHz) switching external MOSFET in series with the LED string frequency and directly driven by a dedicated pin. The pin External synchronization for multi-device that manages the LED current setting, usually applications connected to an external resistor, can also be High performance external MOSFET driver used as analog control if a microcontroller is Cycle-by-cycle external MOSFET OCP located in the LED module. The high-side current sensing, in combination with a P-channel Fixed internal soft-start MOSFET, provides effective protection in case Programmable output OVP the positive terminal of the LED string is shorted Boost, buck-boost and SEPIC topologies to ground. The high precision current sensing supported circuitry allows an LED current regulation Thermal shutdown with autorestart reference within 4% accuracy over the entire Output short-circuit detection temperature range and production spread. A fault output (open-drain) informs the host system of LED control section faulty conditions: device overtemperature, output Up to 60 V output voltage overvoltage (disconnected LED string) and LED Constant current control loop overcurrent. High-side output current sensing circuitry 30 to 300 mV differential sensing voltage Table 1. Device summary 4% output current reference accuracy Order code Package Packing Output overcurrent protection ALED6001 Tube HTSSOP-16 Sensing resistor failure protection (exposed pad) ALED6001TR Tape and reel PWM dimming with auxiliary series switch Analog dimming February 2020 DocID026965 Rev 3 1/26 This is information on a product in full production. www.st.comContents ALED6001 Contents 1 Typical application circuit 3 2 Pin function 4 3 Block diagram 6 4 Absolute maximum ratings . 7 5 Recommended operating conditions . 8 6 Electrical characteristics . 9 7 Device description . 12 7.1 Device supply 12 7.2 Boost controller 12 7.2.1 Turn on and power-down sequences . 12 7.2.2 Boost controller operation . 13 7.2.3 Boost converter stability and slope compensation . 14 7.2.4 Switching frequency oscillator and external synchronization . 16 7.3 LED current regulation and brightness control . 17 7.4 Device protections 20 7.4.1 Linear regulators undervoltage lockout . 20 7.4.2 Power switch overcurrent . 20 7.4.3 Output overvoltage and OVFB pin disconnection . 20 7.4.4 Output rail disconnection detection or output short-circuit to ground . 21 7.4.5 Thermal shutdown . 22 8 Package information 23 8.1 HTSSOP-16 package information 23 9 Revision history . 25 2/26 DocID026965 Rev 3