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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.
Key Features
- Switching controller section
- 5.5 V to 36 V input voltage range
- Very low shutdown current: ISHDN < 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
