EV3378-S-00A

New
4Strings, Step Up Wled Controller Plus High Efficiency Step down Converter
  • Quantity Price
  • 1
    $100.00 /unit

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Product Description

The MP3378 is a one-chip solution, specially designed for monitor applications, which includes a step-up controller with 4 current channels for backlight 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 can support both analog and PWM dimming independently to meet the special dimming mode request. In addition, rich protection modes are also integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection.

The high efficiency buck converter operates in the current mode operation with 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 shut down.

The MP3378 is available in SOIC28 package.

Product Features

  • 4-String, Max 350mA/String WLED Controller
  • Up to 24V Input Voltage Range
  • 2.5% Current Matching Accuracy
  • Programmable Switching Frequency
  • PWM and Analog Dimming Mode
  • LED 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:
  • 90m?/40m? Low Rds(on) Internal Power MOSFETs
  • Low Quiescent Current
  • Fixed 233kHz Switching Frequency
  • Frequency Sync from 250kHz to 2MHz External Clock
  • AAM Power Save Mode
  • Internal Soft Start
  • OCP Protection and Hiccup
  • Over Temperature Protection
  • Output Adjustable from 0.8V

Parametrics

  • IC Supported 1MP3378

Monolithic IC

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IC Details

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.