Description

The ZLED7730 continuous-mode inductive step-down converter is designed for applications requiring high brightness and high current. The ZLED7730 can efficiently drive a single LED or multiple series-connected LEDs from a voltage input high than the LED forward voltage.

ZLED7730 provides a switch dimming function. It detects external switch action to adjust output current, allowing dimming functionality to be achieved without changing the original lighting system circuitry.

The switch dimming is implemented in either two-level mode or three-level mode. The output current of every level and the total number of levels are customer selected by setting the corresponding input conditions of DIM1 and DIM2 pin.

The ZLED7730 offers over-temperature and LED open-circuit protection. Very few external components are needed, thus minimizing bill of material costs.

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Features

• Switch dimming with multiple levels
• Up to 0.35A output current
• Internal 40V power switch
• Wide DC input voltage range 8.5 to 40 VDC
• Output current accuracy: 5% (typical)
• Dimming ratio: 1200:1
• LED open-circuit protection
• Thermal shutdown protection

Benefits

• High efficiency: up to 98%
• Very few external components needed for operation
• Adds switch dimming function to existing installation

Typical Uses

• For high brightness and high current applications