LM3402中文资料42V 0.5A 恒流降压型 LED 驱动器数据手册TI规格书

描述 Description

The LM3402/HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled ON-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set. For all available packages, see the orderable addendum at the end of the data sheet.

特性 Features

• Integrated 0.5-A N-channel MOSFET
• VIN Range from 6 V to 42 V (LM3402)
• VIN Range from 6 V to 75 V (LM3402HV)
• 500 mA Output Current Over Temperature
• Cycle-by-Cycle Current Limit
• No Control Loop Compensation Required
• Separate PWM Dimming and Low Power Shutdown
• Supports All Ceramic-Output Capacitors and Capacitor-Less Outputs
• Thermal Shutdown Protection
• VSSOP, SO PowerPAD Packages