LM3409HV中文资料用于高功率 LED 驱动器的 75V PFET 降压控制器数据手册TI规格书

描述 Description

The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET)controllersfor step-down (buck) current regulators. They offer wide inputvoltage range, high-sidedifferential current sense with low adjustablethreshold voltage and fast output enable/disablefunction and a thermallyenhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDswhere forward currentsup to 5 A are easily achievable. The LM3409 devices use constant off-time (COFT) control to regulate anaccurate constantcurrent without the need for external control loopcompensation. Analog and PWM dimming are easy toimplement and result in ahighly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete thefeature set.For all available packages, see the orderableaddendum at the end of the data sheet.

特性 Features

• LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q100 Grade 1 Qualified
• 2-Ω, 1-A Peak MOSFET Gate Drive
• VIN Range: 6 V to 42 V (LM3409, LM3409-Q1)
• VIN Range: 6 V to 75 V (LM3409HV, LM3409HV-Q1)
• Differential, High-Side Current Sense
• Cycle-by-Cycle Current Limit
• No Control Loop Compensation Required
• 10,000:1 PWM Dimming Range
• 250:1 Analog Dimming Range
• Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
• Low-Power Shutdown and Thermal Shutdown
• Thermally Enhanced 10-Pin, HVSSOP Package

简介

LM3409HV属于集成电路（IC）的LED驱动器。由TI制造生产的LM3409HVLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。