LM3424-Q1数据手册TI中文资料规格书

描述 Description

The LM3424-Q1 is a versatile high voltage N-channel MOSFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. In addition, the LM3424-Q1 includes a thermal foldback feature for temperature management of the LEDs. This flexibility, along with an input voltage rating of 75 V, makes the LM3424-Q1 ideal for illuminating LEDs in a large family of applications.

Adjustable high-side current sense allows for tight regulation of the LED current with the highest efficiency possible. The LM3424-Q1 uses standard peak current-mode control providing inherent input voltage feed-forward compensation for better noise immunity. It is designed to provide accurate thermal foldback with a programmable foldback breakpoint and slope. In addition, a 2.45V reference is provided.

The LM3424-Q1 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2.0 MHz and external synchronization is possible. The controller is capable of high speed PWM dimming and analog dimming.

特性 Features

• AEC Qualified for automotive applications
• Device temperature grade 1: −40°C ≤ TA ≤ 125°C

• VIN range from 4.5 V to 75 V
• High-side adjustable current sense
• 2-Ω, 1-A peak MOSFET gate driver
• Input undervoltage and output overvoltage protection
• PWM and analog dimming
• Cycle-by-cycle current limit
• Programmable soft-start and slope compensation
• Programmable, synchronizable switching frequency
• Programmable thermal foldback
• Precision voltage reference
• Low-power shutdown and thermal shutdown