Requiring a single external resistor to very accurately set its output current, the ZXLD1350 from Zetex Semiconductors dramatically simplifies high power LED driving. Operating from an input supply of between 7V and 30V, the driver can produce an adjustable output current of up to 350mA, to support an LED chain of up to eight 1 Watt LEDs.
Its use of the 2.9mm x 2.8mm footprint TSOT23 5-pin package and its high level of component integration means this switching regulator will fit even the most space-starved application. By integrating a 30V NDMOS switch, and a high-side current sensing circuit yielding a ±4% precision current control, the ZXLD1350 needs the support of a total of just four external circuit components.
Depending on the type and value of the external components used, the LED driver can achieve efficiency as high as 95%. This combined with its very low typical shutdown current of only 15 micro A ensures the device offers good power economy and extended battery life.
Features:
- Simple low parts count
- Internal 30V NDMOS switch
- 350Ma output current
- Single pin on/off and brightness control using DC voltage or PWM
- Internal PWM filter
- Soft-start
- High efficiency
- Wide input voltage range
- 40V trasient capability
- Output shutdown
- Up to 1MHz switching frequency
- Inherent open-circuit LED protection
- Typical 4% output current accuracy
Applications:
- Low voltage halogen replacement LEDs
- Automotive lighting
- Low voltage industrial lighting
- LED back-up lighting
- Illuminated signs
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Linear Technology LT4356-1 at Digi-Key, LEM Minisens ASIC Transducer available at Digi-Key, Infineon Technologies' LED Drivers at Digi-Key, FDI Board Family at Digi-Key, Emerson SMP Blind-Mate Connectors Digi-Key, Cypress SRAM available at Digi-Key, CEL ZigBee Radio Modules available at Digi-Key, Analog Devices EZ-KIT Lite® available at Digi-Key, Allegro LED Drivers available at Digi-Key, 3M EMC Products available at Digi-Key, National Semiconductor Buck Regulators at Digi-Key, Corcom feedthrough Caps and filters at Digi-Key, Antenova's Fusca antenna available at Digi-Key , Bel Fuse Resettable Fuses available from Digi-Key, Power Integrations' PeakSwitch® at Digi-Key, Microchip's IEEE radio transceiver at Digi-Key, Micrel ULDO™ family available at Digi-Key, Cypress PSoC Express kit available at Digi-Key, Emerson's UMC connectors and cables at Digi-Key, AVX BestCap techology at Digi-Key, Cirrus Logic's High-Performance ARM920T Processor, NKK Tilt/Sensor Switch available from Digi-Key, Microchip Emulator available from Digi-Key, National's Audio Solutions available from Digi-Key, Toshiba IRED Photocouplers available at Digi-Key, Xilinx Virtex-4 Family available from Digi-Key, Xilinx Spartan™-3E FPGA available from Digi-Key, Cirrus Industrial Op Amps available from Digi-Key, Texas Instruments' Zero-Drift Op Amplifiers , Texas Instruments Zero-Crossover Op Amplifiers, Murata's Ultra LoeESL capacitors, Murata's Ultra Small GRM Series Capacitors, Antenova Swivel SMA Antenna available at Digi-Key, STMicroelectonics STR91xF Series Microcontroller, Renesas H8/36077 MCUs available from Digi-Key, Hirose LF Series Connectors available at Digi-Key, Murata GA3 Safety Recognized Caps/Hi-Cap MLCC, Allegro Motor Driver, Zetex Current Monitors, OSRAM Pictiva™ OLED Displays, Taiyo Yuden CFCAP Capacitor, NXP's Low-power ARM9 Microcontroller at Digi-Key, Helicomm IP-Link 2220 M2M Network Terminals, Taiyo Yuden's Class 2 Bluetooth Modules, EPCOS Inductors available from Digi-Key, LMX9820A Bluetooth Serial Port Module, Lumex Chroma LED™, Schurter Power Line Filter available at Digi-Key
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Supplier:
Digi-Key Corporation
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