High Current 40V LED Driver with Internal Switch

The ZLED7720 continuous-mode inductive step-down converter is part of our ZLED7x20 family of LED-control ICs. It is designed for applications requiring high brightness and high current. It can efficiently drive a single LED or multiple series-connected LEDs from a voltage input higher than the LED forward voltage: Vin = 6 to 40 VDC. It provides an adjustable output current ≤0.35A, which is set via an external resistor and controlled by the ZLED7720's integrated high-side output current-sensing circuit and high-speed internal 40V power switch. An external control signal on the ADJ pin, which can be a DC voltage, PWM, or microcontroller-generated waveform, can also be used to linearly adjust a continuous output current or to control a gated output current. The output can be turned off by applying a voltage lower than 0.2V to the ADJ pin, which puts the ZLED7720 in a low-current standby state. The ZLED7720 enables diverse industrial and consumer lighting applications requiring high driving currents, wide operating voltage range, high efficiency, and variable brightness control. It offers over-temperature and LED open-circuit protection. The ZLED7720 can also minimize bill-of-material costs because very few external components are required for most applications. Only a resistor, a diode, an inductor, and three capacitors are needed for a typical basic application.

Features

  • Up to 0.35A output current
  • Internal 40V power switch
  • Wide DC input voltage range: 6 to 40 VDC
  • Output current accuracy: 3% (typical)
  • Dimming ratio: 1200:1
  • LED open-circuit protection
  • Thermal shutdown protection

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
ZLED7720ZI1R Obsolete NTG5 VFQFPN 5 -40 to 105°C Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZLED7x20 Short-form Datasheet Short Form Datasheet PDF 78 KB Apr 19, 2016
ZLED7x20 Datasheet Datasheet PDF 549 KB Apr 19, 2016
Application Notes & White Papers
ZLED7000 / ZLED7020 Application Note - Buck Converter LED Driver Applications Application Note PDF 138 KB Apr 20, 2016
PCNs & PDNs
PDN-2017-005-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 106 KB Jun 29, 2017
Other
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 18, 2016

Evaluation Boards