The CAT4240 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz 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. The CAT4240 high-voltage output stage is perfect for driving mid-size and large panel displays containing up to ten white LEDs in series. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power-down mode with 'zero' quiescent current.
评估板 | 状况 | 无铅(Pb-free) | 简短说明 | 所用产品 |
---|---|---|---|---|
CAT4240AGEVB | Active | EVAL BOARD FOR LED DRIVER | CAT4240TD-GT3 |
类型 | 文档标题 | 文档编号 | 修订号 |
EVAL BOARD FOR LED DRIVER: BOM | CAT4240AGEVB Bill of Materials ROHS Compliant | CAT4240AGEVB_BOM_ROHS.PDF | 0 |
EVAL BOARD FOR LED DRIVER: Gerber | CAT4240AGEVB Gerber Layout Files (Zip Format) | CAT4240AGEVB_GERBER.ZIP | 0 |
EVAL BOARD FOR LED DRIVER: Schematic | CAT4240AGEVB Schematic | CAT4240AGEVB_SCHEMATIC.PDF | 0 |
EVAL BOARD FOR LED DRIVER: Test Procedure | CAT4240AGEVB Test Procedure | CAT4240AGEVB_TEST_PROCEDURE.PDF | 0 |
EVAL BOARD FOR LED DRIVER: Manual | CAT4139 LED Driver Evaluation Board User's Manual | EVBUM2021/D | 3 |