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ZLED7022 - Application Circuit
ZLED7022 - Block Diagram
ZLED7022 - Pinout

ZLED7022

Low-Voltage Six-Channel LED Driver

The ZLED7022, one of the ZLED family of LED control ICs, is a low-noise, constant-frequency charge pump DC/DC converter that can drive up to six LED channels, providing a programmable constant current level ranging from 1.8mA to 20mA per LED channel. It can also drive higher current LEDs because its current sinks can operate in parallel. It enables white or other color LED applications that require uniform intensity and/or linear progressions in brightness. Capable of operating efficiently with DC voltage supplies ranging from 2.8V to 5.5V, it is ideal for small, battery-powered applications because very few external components are needed: typically one small-dimension 1μF capacitor across the C+ and C- pins and two small-dimension 2.2μF capacitors to GND from the VCC and Vout pins. The ZLED7022's Pulse Count Control (PCC) serial digital input is used to enable/disable the LEDs and set the current level (14 settings using a nearly logarithmic scale to provide a linear brightness progression). This simple, high-speed interface allows efficient real-time management of LEDs via microcontrollers or control systems. The ZLED7022's features include integrated soft-start circuitry to protect against excessive in-rush current during power-on and a low-current shutdown mode that reduces quiescent current consumption to approximately 1μA (typical) by disconnecting the load from the input when the EN/SET pin is low for a specified time.

Features

  • Low quiescent current in low-current shutdown mode: 1μA typical, <2μA maximum
  • Integrated thermal shutdown protection prevents damage by shutting down the ZLED7022 if the die junction temperature exceeds 160°C (typical)
  • Fixed charge pump switching frequency: 1MHz (typ.)
  • Soft-start feature protects against excessive inrush current during power-on
  • Current matching accuracy: ±0.9% (typical)
  • One-pin on/off or brightness control for up to six LEDs via a simple PCC serial interface—no pulse-width modulation or additional control circuit needed
  • 14 programmable current levels for achieving real-time control of effects such as LED fade-out or sudden changes in brightness
  • Low EMI and back-injected noise because the charge pump is not inductor-based
  • Very few external components needed for operation
  • Flexible design enables diverse LED applications: up to 20mA per channel
  • LED driver family concept with low-voltage four-channel LED driver ZLED7012

Product Specification

ArchitectureInput Voltage Range (V)Output Current Max (A)Channels (#)Advanced Features
Charge Pump2.80 - 5.500.026

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. RangeCarrier TypeSample & Buy
ZLED7022ZI1RActiveNEG12VFQFPN12-40 to 85°CReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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ZLED7022 Short-form Datasheet Short Form Datasheet PDF 72 KB Apr 20, 2016
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ZLED7022 Datasheet Datasheet PDF 288 KB Apr 20, 2016
User Guides & Manuals
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ZLED7022KIT-E1 Evaluation Kit Description Manual PDF 518 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