ZXLD1362 - Miniature 2A LED Driver

Tackling Higher Power Tasks - 6V-60V Input with Internal Switch

Zetex  ImageOperating from a 6V to 60V 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 1A. 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 2.8mm x 2.9mm and an off-board height of 1mm.

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 1MHz, the ZXLD1362 is able to offer highly sensitive and accurate LED brightness control, with a typical dimming ratio of 1000:1 cited at 300Hz. A soft-start feature can also be achieved by the addition of an external capacitor. Integrating a 60V 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 50kΩ 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.

Digi-Key
Part Number
Diodes
Part Number
Input Voltage Range (V) Max Output Voltage (V) Quiescent
Current µA
Max Switch Current mA Package
ZXLD1362ET5TR-ND ZXLD1362ET5TA 6 to 60 60 65 1000 TSOT23-5
ZXLD1362ET5CT-ND
ZXLD1362ET5DKR-ND
Digi-Key Part Numbers:  TR-ND = Tape & Reel;  CT-ND = Cut Tape;  DKR-ND = Custom Qty with Leader/Trailer
 
  Features:   Applications:
 
  Simple low parts count   Low voltage halogen replacement LEDs
  Internal 60V NDMOS switch   Automotive lighting
  Up to 1A output current   Low voltage industrial lighting
  Single pin on/off and brightness control using DC voltage or PWM   LED back-up lighting
  PWM resolution up to 3000: 1   Illuminated signs
  High efficiency (up to 95%)   Emergency lighting
  Wide input voltage range: 6V to 60V   SELV lighting
  65V transient capability   LCD TV backlighting
  Low power shut down      
  Up to 1MHz switching frequency Datasheet  
  Inherent open-circuit LED protection Package Information TSOT23-5  
  Typical 4% output current accuracy