MP4000

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Offline Buck LED Controller


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产品描述

The MP4000 is a high efficiency step-down converter designed for driving high brightness Light Emitting Diodes (LEDs). The MP4000 drives an external MOSFET in the floating buck converter structure. The inductor current is regulated with boundary conduction mode which features no reverse recovery loss in the freewheeling diode and soft turn on for the power MOSFET.  Such operation mode can achieve very high efficiency and at the same time minimize the inductor value and size. Also, the LED current can be well regulated by controlling the MOSFET peak current, which is sensed through an external resistor. Its low 300mV feedback voltage reduces power loss and improves efficiency. The MP4000 can accept an external PWM or a DC signal for the burst dimming control.  The MP4000 features output short protection, maximum switching frequency limit, under-voltage lockout and thermal shut down.

产品特性

  • Constant-current LED Driver
  • Power MOSFET Zero-Current Turn On
  • No Freewheeling Diode Reverse Recovery Issues
  • High Efficiency and Reliability in Boundary Mode Operation
  • Low 0.9mA Operation Current
  • PWM or DC Input Burst Dimming Control
  • Hiccup Short Circuit Protection
  • UVLO, Thermal Shutdown
  • Maximum Frequency is Limited to 110kHz
  • Available in SOIC8 Package

技术参数

  • SyncNo
  • Open LED ProtectionNo
  • PackageSOIC-8
  • GradeCatalog
  • TypeBuck
  • Vfb (V)0.3
  • Vac (max) (V)305
  • Pout (max) (W)40
  • Vac (min) (V)85
  • Iq (mA)0.64

350mA Off-Line WLED Driver Evaluation Board For 180-260VAC Input

The EV4000DS-00C is an evaluation board for the MP4000. The EV4000DS-00C is a high efficiency step-down converter designed for driving high brightness Light Emitting Diodes (LEDs).

The EV4000DS-00C can supply a maximum output current of 350mA to drive 10 to 40V LED strings from a wide input voltage 180 to 260VAC with 50/60Hz.

¥ 171.25 + tax