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LM3492HC - 产品图解：
LM3492HC-具有升压转换器和快速稳流器的双通道独立可调 LED 驱动器
LM3492HC-LED照明-照明-LED驱动器-电源管理
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TI产品 - LM3492HC介绍

LM3492HC - 具有升压转换器和快速稳流器的双通道独立可调 LED 驱动器

LM3492HC是TI德州仪器公司的一款LED照明-照明产品，LM3492HC是具有升压转换器和快速稳流器的双通道独立可调 LED 驱动器，本站介绍了LM3492HC的封装应用图解、特点和优点、功能等，并给出了与LM3492HC相关的TI元器件型号供参考。

LM3492HC - 具有升压转换器和快速稳流器的双通道独立可调 LED 驱动器 - LED照明-照明 - LED驱动器 - 德州仪器

产品特性
  • Boost Converter
    • Automotive Grade Product, Q100 Grade-1 Qualified
    • Very Wide Input Voltage Range: 4.5 V to 65 V
    • Programmable Soft-Start Period
    • No Loop Compensation Required
    • Stable with Ceramic and Other Low ESR Capacitors with No Audible Noise
    • Nearly Constant Switching Frequency Programmable from 200 kHz to 1 MHz
  • Current Regulator
    • Programmable LED Current: 50 mA to 250 mA
    • 10000:1 Contrast Ratio, 300-ns Minimum Pulse Width
    • Two Individual Dimmable LED Strings up to 65V, Total 15 W (Typically 28 LEDs at 150mA)
    • Dynamic Headroom Control Maximizes Efficiency
    • Over-Power Protection
    • ±3% Current Accuracy
  • Supervisory Functions
    • Precision Enable
    • COMM I/O Pin for Diagnostic and Commands
    • Thermal Shutdown Protection
    • Thermally Enhanced PWP, 20-Pin Package
产品应用
  • Ultra-High Contrast Ratio 6.5” to 10” LCD Display Backlight up to 28 LEDs
  • Automotive or Marine GPS Display
产品说明

The LM3492HC/-Q1 device integrates a boost converter and a two-channel current regulator to implement a highly efficient and cost effective LED driver. This device drives two individually dimmable LED strings with a maximum power of 15 W and an output voltage of up to 65 V. The boost converter employs a proprietary projected-on-time control method to give a fast transient response with no compensation required. The nearly constant switching frequency can be set to a level from 200 kHz to 1 MHz. Ceramic capacitors stabilize the application circuit and produce no audible noise on dimming. The programmable peak current limit and soft-start features reduce current surges at start-up. An integrated, 190-mΩ, 3.9-A, N-Channel MOSFET switch minimizes the solution size. The fast slew rate current regulator allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio of 10000:1. The LED current can be set from 50 mA to 250 mA by a single resistor.

产品器件信息
PART NUMBERPACKAGEBODY SIZE (NOM)
LM3492HCPWP (20)6.50 mm × 4.40 mm
LM3492HC-Q1
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