Single-Stage Single Chip Solution for Smart LED

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Product Description

The MP4057A is a single-chip/single-stage solution for smart LED applications that can regulate LED current with primary-side regulation (PSR) control and supply power for microcontroller units (MCU) and wireless modules. The MP4057A is the most ideal solution for smart LED lighting because of its simplest design, fewest external components, and lowest cost.

The MP4057A achieves a high power factor and accurate LED current. The proprietary real-current-control method accurately controls LED current from the primary-side information. The MP4057A integrates power-factor correction and works in valley switching mode to reduce MOSFET switching loss.

The MP4057A achieves ultra-low standby loss (typically 30mW no-load power) by decreasing the working frequency in standby mode.

The MP4057 has an integrated charging circuit at the supply pin for fast start-up without a perceptible delay.

Based on the information from DIM, the MP4057A can operate in two operation modes: constant current (CC) and constant-voltage (CV). The LED can turn off when the MP4057A works in CV mode. During the transition between CC and CV, the LED does not flicker, and the voltage of the MCU/wireless module does not drop.

The MP4057A’s multiple protection features enhance system reliability and safety greatly. These features include over-voltage protection (OVP), short-circuit protection (SCP), primary-side over-current protection (OCP), brown-out protection, cycle-by-cycle current limiting protection, under-voltage lockout (UVLO), and auto-restart over-temperature protection (OTP).

The MP4057A is available in MSOP-10 and SOIC14 packages.

Product Features

  • Single-Chip/Single-Stage with LED Driver and Power Supply for MCU/Wireless Modules
  • Fast Start-Up
  • Ultra-Low Standby Loss, Typically Less Than 30mW in No-Load Condition, Optional Circuit for Less than 15mW at No Load
  • 5% Deep Dimming
  • No Flicker
  • Low Audible Noise
  • Valley Switching Mode in CC Mode for Good Efficiency
  • Good Power Factor (PF) (Typically >0.9)
  • Good Transient Response
  • Cycle-by-Cycle Current Limit Protection in CV Mode
  • Primary-Side Over-Current Protection (OCP)
  • Output Over-Voltage Protection (OVP) and Short-Circuit Protection (SCP)
  • Under-Voltage Lockout (UVLO)
  • Thermal Shutdown (160°C/100°C)
  • Available in MSOP-10 and SOIC14 Packages


  • SyncNo
  • Open LED ProtectionNo
  • PackageMSOP-10, SOIC-14
  • TypeBuck
  • Vfb (V)0.203
  • Vac (max) (V)305
  • Rds(on) (Ω)0.3
  • Pout (max) (W)8
  • Vac (min) (V)85

198VAC~265VAC/50Hz, 21V/370mA+3.3V/50mA Single-Stage,Single-Chip Solution for Smart LED

The EV4057A-K-00A Evaluation Board is designed to demonstrate the capabilities of MP4057A. The MP4057A is a single stage single chip solution for smart LED application. It can regulate the LED current with PSR control and meanwhile to supply power for MCU/wireless module. It is an ideal solution for smart LED lighting because of simplest design, fewest external components and lowest cost.

The EV4057A-K-00A adopts the Flyback topology to drive a 21V LED and supply a 3.3V/50mA smart control module. Its specification lists below.

Determined by the customer specification about the standby power, the EV4057A-K-00A can be configured two kinds of circuits. The default EVB board is designed for less than 30mW standby power, as Fig1 shows. It can also be configured as 15mW standby power as Fig2 shows

$50.00 + tax

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.