10 October 2018
Power Electronics / Power Management
Allegro MicroSystems has announced the release of the ALT80802, its latest addition to the family of 62xx/808xx LED drivers for lighting. The ALT80802 addresses a key market trend of 3 to 4 white LEDs in a single string powered from a 12 V battery input, which is very desirable for fog, backup, DRL, side mirror and other automotive lighting applications.
The device can meet this requirement with a solution that provides 2 MHz operation, enhanced performance in PWM dimming capability and fault protection, reducing the external component count. Furthermore, it can be operated in buck mode up to 2 A, to drive 1 or 2 LEDs from the battery or up to 12 LEDs from a pre-boost supply.
The ALT80802 is a high-frequency switching regulator that provides constant output current to drive high-power LEDs. It is designed to aid in EMC/EMI design by frequency dithering, soft freewheel diode turn-off, and well controlled switch node slew rates.
A programmable oscillator allows the device to switch up to 2,5 MHz, outside EMI-sensitive frequency bands such as the AM band. It integrates a power MOSFET for step-down (buck) or inverting buck-boost conversion. The 50 V-rated Enable pin can be tied to VIN for automatic startup, to support battery-level PWM dimming common in legacy body controllers. The wide input range of 3,8 to 50 V makes the ALT80802 highly flexible.
With current-mode control and simple external compensation, the ALT80802 can achieve fast transient response. The control loop of the ALT80802 is designed for PWM dimming operation to achieve low dimming on-time, low turn-on overshoot, accurate PWM duty cycle, and wide dimming range.
Extensive protection features of the ALT80802 include pulse-by-pulse current limit, hiccup mode short circuit protection, open/short freewheeling diode protection, BOOT open/short voltage protection, VIN under-voltage lockout, and thermal shutdown.
The ALT80802 is AEC-Q100 automotive qualified and is available in a small 10-pin DFN package with thermal pad and wettable flank.
Ultra-low-power wireless module Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STM32WBA5MMG from STMicroelectronics is an ultra-low-power, small form factor, certified 2,4 GHz wireless module that supports Bluetooth LE, Zigbee 3.0, OpenThread, and IEEE 802.15.4 proprietary protocols.
Read more...Powering Innovation eBook: Changing what’s possible
Power Electronics / Power Management
This exclusive read, entitled ‘Changing what’s Possible,’ delves into how power dense Vicor modules enable many world-changing innovations across various sectors.
Read more...16-channel multicell battery monitor Altron Arrow
Power Electronics / Power Management
The ADBMS6830B is a multicell battery stack monitor that measures up to 16 series-connected battery cells with a lifetime total measurement error of less than 2 mV.
Read more...Reliable redundancy with the Mibbo M3DN Series Conical Technologies
Power Electronics / Power Management
Designed for use with two parallel-connected power supplies, the M3DN Series allows for true redundancy, making it ideal for mission-critical applications.
Read more...Automotive power-over-coax inductor RS South Africa
Power Electronics / Power Management
TDK has launched the ADL8030VA, a high-performance inductor designed specifically for power-over-coaxial applications.
Read more...Rugged PSU for challenging conditions Conical Technologies
Power Electronics / Power Management
Built for rugged reliability, the Mibbo MFC Series delivers stable, efficient power in environments where moisture, dust, and temperature extremes are everyday challenges.
Read more...Enhance SiC device efficiency using merged-pin Schottky diodes NuVision Electronics
Editor's Choice Power Electronics / Power Management
Silicon carbide (SiC) has advantages over silicon (Si) that make it particularly suitable for Schottky diodes in applications such as fast battery chargers, photovoltaic (PV) battery converters, and traction inverters.
Read more...15 W power module with wide input range Brabek
Power Electronics / Power Management
RECOM’s miniature power modules provide 15 W output and operate over a wide input range of 18-264 V AC or 18-375 V DC.
Read more...Industrial-grade DIN rail PSU Conical Technologies
Power Electronics / Power Management
The Mibbo MTR960W is a reliable and cost-effective PSU option that delivers a solid 960 W of output power at 24?or 48 V DC.
Read more...Energy harvesting and Matter for smarter homes RF Design
Power Electronics / Power Management
Qorvo’s collaboration with e-peas on the Matter Enabled Light Switch marks another significant step in advancing Matter adoption across the IoT industry.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version