40V LED Driver with Temperature Compensation

The ZLED7010, one of our ZLED Family of LED control ICs, is an inductive step-down converter that is optimal for driving a single LED or multiple LEDs (connected in series) from a voltage source greater than the voltage rating of the LED. The ZLED7010 operates in continuous mode. Capable of operating efficiently with voltage supplies ranging from 6 VDC to 40 VDC, it is ideal for low-voltage lighting applications. The ZLED7010 minimizes current consumption by remaining in a low-current standby mode (output is off) until a voltage of ≥0.3V is applied to the ADJI pin. In operating mode, the ZLED7010 can source LEDs with an output current of ≤750mA (≤30 watts of output power) that is externally adjustable. The ZLED7010's integrated output switch and high-side current sensing circuit use an external resistor to adjust the average out-put current. LED control is achieved via an external control signal at the ZLED7010's ADJI pin, implemented as a pulse-width modulation (PWM) waveform for a gated output current or a DC voltage for continuous current. The ZLED7010 provides a temperature compensation function for maintaining stable and reliable LED operation. LED over-temperature conditions are detected via a negative temperature coefficient (NTC) thermistor mounted close to the LEDs. If an over-temperature condition occurs, the NTC value reaches the value of a threshold resistor and the IC reduces LED current automatically. After the circuit recovers to a safe temperature, current returns to the set value. ADJO outputs and ADJI inputs of consecutive ICs can be interconnected as a driver chain deploying the temperature compensation information of the predecessor. This reduces the part count because only the first stage of the series requires an NTC.

Features

  • Capable of 95% efficiency
  • Operates in continuous mode with a wide input range from 6 VDC to 40 VDC
  • Integrated 40V power switch
  • One-pin on/off or brightness control via DC voltage or PWM control signal
  • Switching frequency: ≤1MHz
  • Dimming rate: 1200:1 (typical)
  • Output current accuracy: 5% (typical)
  • Built-in temperature compensation and open-circuit protection for LEDs
  • Thermal shutdown protection for the ZLED7010
  • Very few external components needed for operation
  • Broad range of applications: outputs up to ≤750mA
  • SOP-8 package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
ZLED7010ZI1R Active DCG8 SOIC 8 Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZLED7010 Short-form Datasheet - Short Form Datasheet PDF 140 KB Apr 19, 2016
ZLED7010 Datasheet - Datasheet PDF 894 KB Apr 19, 2016
User Guides & Manuals
ZLED7010KIT-D1 Demo Kit Description - Manual PDF 663 KB Apr 25, 2016
Other
IDT CAD Altium Libraries for AID Products Rev 20160819 - PCB Design Files ZIP 1.20 MB Aug 18, 2016

Evaluation Boards