MP3378

新产品
4-Channel WLED Controller And High Efficiency Buck Converter


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产品描述

The MP3378 is a one-chip solution designed for monitor applications. It includes a step-up controller with 4 current channels for backlighting and a high-efficiency buck converter for internal bus voltage or standby power. The 4-string WLED controller drives an external MOSFET to boost up the output voltage from the input supply. It regulates the current in each LED string to the programmed value set by an external current-setting resistor. It supports both analog and PWM dimming independently to meet the special dimming mode request. In addition, rich protection modes are integrated including OCP, OTP, UVP, OVP, LED short/open protection, and inductor/diode short protection. The high-efficiency buck converter operates in current mode with a built in MOSFET and synchronous rectifier. It offers a very compact solution to achieve excellent load and line regulation. Full protection features include OCP and thermal shutdown. The MP3378 is available in SOIC28 and TSSOP28EP package.

产品特性

  • WLED Controller:
  • 4-String, Max 350 mA/String WLED Controller
  • Up to 24 V Input Voltage Range
  • 2.5% Current Matching Accuracy
  • Programmable Switching Frequency
  • PWM and Analog Dimming Mode
  • Open and Short LED Protection
  • Programmable Over-Voltage Protection
  • Recoverable Thermal Shutdown Protection
  • Over-Current Protection
  • Over-Temperature Protection
  • Inductor/Diode Short Protection
  • Buck Converter:
  • 144 mO/58 mO Low Rds(on) Internal Power MOSFETs
  • Low Quiescent Current
  • Fixed 235 kHz Switching Frequency
  • Frequency Sync from 250 kHz to 2 MHz External Clock
  • AAM Power-Save Mode
  • Internal Soft Start
  • OCP and Hiccup
  • Over-Temperature Protection
  • Output Adjustable from 0.8 V

技术参数

  • Vin (min) (V)5
  • Vin (max) (V)24
  • Channels4
  • fsw (min) (kHz)250
  • Ichannel (max) (A)0.35
  • LEDx ABS Voltage (V)55
  • fsw (max) (kHz)2000
  • GradeCatalog
  • PackageSOIC-28, TSSOP28 EP
  • Power MOSFETExternal
  • TopologyBuck, Boost
  • Dimming (Output)P-Dim, A-Dim
  • Typical LCD Screen SizesMedium (10"-29"), Large (30"-45")
  • Other FeaturesMultiple Outputs

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套件详情

The MP3378E is a one-chip solution specially designed for monitor applications. The MP3378E includes a step-up WLED controller with four current channels for backlighting, and a high efficiency buck converter for internal bus voltage or standby power.

The 4-string WLED controller drives an external MOSFET to boost up the output voltage from the input supply. It regulates the current in each LED string to the programmed value set by an external current setting resistor. It supports both analog and PWM dimming independently to meet special dimming mode request. Full protection features for the WLED controller include OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection.

The high-efficiency buck converter operates in the current mode operation with a built-in MOSFET and a built-in synchronous rectifier. It offers a very compact solution to achieve excellent load and line regulation. Full protection features for the buck converter include OCP and thermal shutdown.

The MP3378E is available in a TSSOP-28EP package.

US$ 100.00 + tax