ST LED6001

The LED6001 device is a LED driver that combines a boost controller and a 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. The brightness of the LEDs can be controlled through PWM dimming and analog dimming (10:1 ratio) by means of two independent pins. Enhanced PWM dimming can be obtained thanks to a MOSFET in series with the LED string and directly driven by a dedicated pin. The high-side current sensing, in combination with a P-channel MOSFET, provides an effective protection in case the positive terminal of the LED string is shorted to ground. The high precision current sensing circuitry allows a LED current regulation reference within ± 4% accuracy over the whole temperature range and production spread. A fault output (open-drain) informs the host system about faulty conditions: device overtemperature, output overvoltage (disconnected LED string) and LED overcurrent. The LED6001 device is a LED driver that integrates a boost controller, a high-side current sensing circuitry and a gate driver for an external dimming switch. It has been specifically designed for driving a single string of high-brightness LEDs. The device can support boost, floating buck-boost and SEPIC topologies in order to cover most of applications. A single pin, PWMI, combines both the device enable and PWM dimming control functions. The brightness of the LED string can be controlled through PWM modulation, analog control of the output current level (by means of a dedicated pin) or a combination of the two.

• Switching controller section
• 5.5 V to 36 V input voltage range
• Very low shutdown current: lSHDN < 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

• Indoor and architectural LED lighting
• Emergency LED lighting
• Off - grid LED street lighting
• White goods
• Gaming/gambling machines