ZXLD1362 LED Driver

Tackling higher power tasks - 6 V to 60 V input with internal switch from Diodes

Image of Diodes Incorporated's ZXLD1362 - Miniature 2A LED DriverOperating from a 6 V to 60 V input supply and achieving up to 95% efficiency, the ZXLD1362 from Diodes, Inc. can drive up to 16 high power LEDs with an adjustable output current of up to 1 A. Provided in the tiny TSOT23-5 package, this LED driver is the smallest of its kind in its current rating, with a maximum footprint of 2.8 mm x 2.9 mm and an off-board height of 1 mm.

Simple to use and requiring just four external components, this highly integrated chip supports a range of flexible LED brightness and thermal management schemes. Output current can be adjusted by applying either PWM or DC voltage control signals to the adjust pin. Application of a low voltage signal turns the output off and puts the device into a low current standby mode.

Supporting an operating frequency of up to 1 MHz, the ZXLD1362 is able to offer highly sensitive and accurate LED brightness control, with a typical dimming ratio of 1000:1 cited at 300 Hz. A soft-start feature can also be achieved by the addition of an external capacitor. Integrating a 60 V MOS switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal output current, the chip enables high power LEDs to benefit from ground referenced return paths, of particular importance in architectural lighting applications.

To simplify thermal control, the input resistance of the chip's adjust pin has been set at 50 kΩ in order to be compatible with common thermistor values. The chip's compact design and ability to comfortably withstand high-voltage transients, means it will also appeal to space-starved automotive and industrial applications.

Features
  • Simple low parts count
  • Internal 60 V NDMOS switch
  • Up to 1 A output current
  • Single pin on/off and brightness control using DC voltage or PWM
  • PWM resolution up to 3000:1
  • High efficiency (up to 95%)
  • Wide input voltage range: 6 V to 60 V
  • 65 V transient capability
  • Low power shut down
  • Up to 1 MHz 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
  • Emergency lighting
  • SELV lighting
  • LCD TV backlighting
ZXLD1362
ImageManufacturer Part NumberDescriptionTypeTopologyAvailable QuantityBuy Now
IC LED DRIVER RGLTR DIM TSOT23-5ZXLD1362ET5TAIC LED DRIVER RGLTR DIM TSOT23-5DC DC RegulatorStep-Down (Buck)6249 - Immediate
Published: 2012-06-29