Part Name
ASL3417SHN
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ASL3417SHN Datasheet - NXP Semiconductors.
NXP Semiconductors.
General description
The ASL3417SHN has a hysteretic buck DC-to-DC topology. With input voltages from 10 V to 80 V, it allows maximum flexibility on output voltages for each channel, enabling applications with up to 20 LEDs. It also provides an output current of up to and above 1.5 A per channel.1 Furthermore, two output channels can be connected together to provide an even higher current. It drives an external high-side N channel MOSFET from an internally regulated adjustable supply. The ASL3417SHN buck driver gives a flexible system design which can be used to drive three LED strings with the same architecture.
Features and benefits
◾ The ASL3417SHN is an automotive grade product that is AEC-Q100 grade 1 qualified.
◾ Operating ambient temperature range of -40 °C to +125 °C
◾ Wide operating input voltage range from +10 V to +80 V
◾ Able to drive up to 20 LEDs, wide operating LED voltage range regulated from 2.5 V to 70 V
◾ Output current of up to and above 1.5 A with high LED current accuracy of ±5 % over the complete operating temperature range
◾ Output current programmable via SPI interface
◾ Read back programmed current via SPI
◾ Customer programmable Limp-home mode.
◾ Two output current ranges, programmable via SPI interface with 5 % accuracy
◾ Hysteretic converter
◾ Fast gate drive for high efficiency
◾ Programmable internal gate driver voltage regulator
◾ Support logic level and standard level FETs
◾ Integrated bootstrap diode
◾ PWM inputs for individual dimming of each channel
◾ Low Electro Magnetic Emission (EME) and high Electro Magnetic Immunity (EMI)
◾ Input voltage monitoring and input under voltage protection
◾ Output voltage monitoring
◾ Control signal to enable the device
◾ Junction temperature monitoring via SPI
◾ Small package outline HVQFN32
◾ Low quiescent current < 5 μA at 25 °C when EN = 0
◾ Short-circuit and open-circuit output protection
Applications
◾ Automotive LED lighting
✦ Daytime running lights
✦ Position or park light
✦ Low beam
✦ High beam
✦ Turn indicator
✦ Fog light
✦ Cornering light
✦ Advanced front lighting
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