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 continu-ous 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 mini-mizes 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 con-trol 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 compen-sation 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. 

*see Data Sheet

• 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 

• Illuminated LED signs and other displays
• LED traffic and street lighting (low-voltage)
• Architectural LED lighting, including low-voltage applications for buildings
• Halogen replacement LEDs (low-voltage)
• LED flood-lighting
• LED backlighting
• General purpose exterior and interior LED lighting, including applications requiring low-voltage
• General purpose low-voltage industrial applications