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ZLED7720 - Application Circuit
ZLED7720 - Block Diagram
ZLED7720 - Pinout

ZLED7720

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 Specification

ArchitectureInput Voltage Range (V)Output Current Max (A)Channels (#)Advanced Features
Buck6.00 - 40.000.351DC Dimming, PWM Dimming

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. RangeCarrier TypeSample & Buy
ZLED7720ZI1RActiveNTG5VFQFPN5-40 to 85°CReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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ZLED7x20 Short-form Datasheet Short Form Datasheet PDF 78 KB Apr 20, 2016
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ZLED7x20 Datasheet Datasheet PDF 549 KB Apr 20, 2016
Apps Notes & White Papers
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ZLED7000 / ZLED7020 Application Note - Buck Converter LED Driver Applications Application Note PDF 138 KB Apr 21, 2016
Other
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IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 19, 2016

Evaluation Boards