Chip SN3350IP05E-02

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The SN3350 is a switching buck converter designed to efficiently drive one or a group of parallel-series-connected LEDs from a supply voltage higher than the LED supply voltage. The microcircuit operates from an input voltage in the range from 6 V to 40 V and provides control and setting of an output current up to 750 mA by an external resistor.

Depending on the supply voltage and external components, the converter can deliver up to 30 W of output power.

The SN3350 contains an integrated output switch and a power line output current sensing circuit that uses an external resistor to set the average power rating.

The output current can be adjusted linearly by applying an external control signal to the ADJ pin. A DC voltage or a PWM signal can be applied to the ADJ pin. This provides continuous or pulsed control of the output current.

Applying 0.2 V or less to the ADJ pin turns off the converter and puts the driver into standby mode with minimal power consumption.

The microcircuit is available in SOT23-5 and SOT89-5 packages. The SOT23-5 package is designed for applications with an output current of up to 350 mA, and the SOT89-5 package is for applications with an output current of up to 700 mA.

Features:

a small number of external components;
internal 40 V integrated output switch;
wide range of input voltage: from 6 V to 40 V;
up to 700 mA output current (SOT89-5 package);
high productivity (up to 95%);
typical dimming adjustment range 1200: 1;
typical accuracy of output current 5%;
single input for turning on, turning off and dimming; using constant voltage or PWM signal;
switching frequency at 1 MHz;
protection in case of open or disconnected LED;
thermal protection against overheating;
two housings available for different maximum currents.

Applications.

Low voltage LED light sources.
Automotive lighting.
Low voltage industrial lighting.
Light signs

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Stabilizer assembly board
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