Monolithic Power Systems (MPS) MP4057A Single-Stage Smart LED Solution
Monolithic Power Systems (MPS) MP4057A Single-Stage Smart LED Solution for smart LED applications that can regulate LED current with supply power and primary-side regulation (PSR) control for microcontroller units (MCU) and wireless modules. The MP4057A is an ideal solution for smart LED lighting because of its simplest design, lowest cost, and fewest external components.
The MP4057A achieves an accurate LED current and high power factor. The LED current from the primary-side information accurately controls the proprietary real-current-control method. The MP4057A works in valley switching mode and integrates power-factor correction to reduce MOSFET switching loss. By decreasing the working frequency in standby mode, the MP4057A achieves ultra-low standby loss (typically 30mW no-load power). 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 modes: constant current (CC) and constant voltage (CV). The LED can turn off when the MP4057A is in CV mode. During the transition between CC and CV, the voltage of the MCU/wireless module does not drop, and the LED does not flicker.
The Monolithic Power Systems (MPS) MP4057A’s multiple protection features greatly enhance system reliability and safety. These features include short-circuit protection (SCP), over-voltage protection (OVP), brown-out protection, primary-side over-current protection (OCP), under-voltage lockout (UVLO), cycle-by-cycle current limiting protection, and auto-restart over-temperature protection (OTP). The MP4057A is available in MSOP-10 and SOIC-14 packages.
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 SOIC-14 packages
Applications
- Zigbee®/BLUETOOTH® smart lighting
- DALI or Dmax dimming protocol
Typical Applications
