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.

• 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-?, 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

• Number of channels (#)
• 1
• Topology
• Boost Controller, Buck-Boost Controller, Sepic Controller
• Rating
• Automotive
• Operating temperature range (C)
• -40 to 125
• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 75
• Vout (Min) (V)
• 3
• Vout (Max) (V)
• 72
• Iout (Max) (A)
• 5
• Iq (Typ) (mA)
• 2
• Switching frequency (Max) (kHz)
• 2000
• Features
• Adjustable Switch Frequency, Enable/Shutdown, Power Good, Soft Start, Synchronization Pin, Thermal Shutdown

LM3424-Q1的完整型号有：LM3424QMH/NOPB、LM3424QMHX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3424QMH/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：73个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3424QMH/NOPB的批量USD价格：1.171（1000+）

LM3424QMHX/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3424QMHX/NOPB的批量USD价格：.976（1000+）

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This wide range evaluation board showcases the LM3424 NFET controller used with a buck-boost current regulator. It is designed to drive 4 to 10 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 70V. The evaluation board showcases many of the LM3424 features including (...)

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