CAT4238TD-GT3

CAT4238TD-GT3
High Efficiency 10 LED High Voltage Boost Converter, TSOT23, ON Semiconductor, RoHS

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The CAT4238 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1 MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. LED currents up to 40 mA can be supported over a wide range of input supply voltages up to 5.5 V, making the device ideal for battery-powered applications. The CAT4238 high-voltage output stage is perfect for driving mid-size and large panel displays containing up to ten white LEDs in series.

Features:

• Drives High Voltage LED Strings (38 V)
• Up to 87% Efficiency
• Low Quiescent Ground Current 0.6 mA
• Adjustable Output Current
• 1 MHz Fixed Frequency Low Noise Operation
• Soft Start “In-rush” Current Limiting
• Shutdown Current Less than 1 uA
• Automatic Shutdown at 1.9 V (UVLO)
• Thermal Overload Protection

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