MP44010
High-performance boundary conduction mode PFC controller achieving >0.95 power factor with low THD for offline power...
Product Overview
Description
The MP44010 implements boundary conduction mode (BCM) power factor correction to achieve high power factor (>0.95) and low total harmonic distortion (<10%). Operating in CRM eliminates switching losses at turn-on, improving efficiency compared to continuous conduction mode alternatives.
The controller features integrated startup circuitry, multiplier for sinusoidal current reference, and comprehensive protection functions. The internal OVP protection ensures safe operation during load transients. The device supports wide output power range from 50W to 300W.
Key benefits include reduced EMI filtering requirements due to soft switching, minimal external component count, and excellent light-load efficiency. The MP44010 is ideal for LED drivers, TV power supplies, and industrial power applications requiring power factor correction.
Product Series
MP
Primary Application
LED drivers
Key Features
- CRM operation
- >0.95 power factor
- Low THD
- Integrated protection
- Wide power range
Specifications
| Input Voltage | 85V to 265V AC |
|---|---|
| Output Power | 50W to 300W |
| Power Factor | >0.95 |
| THD | <10% |
| Operating Frequency | Variable (25kHz to 250kHz) |
| Operating Temperature | -40°C to +125°C |
| Package | SOIC-8 |
Applications
LED drivers
Motor drive and control systems
TV power supplies
Electronic system design
Industrial power
Industrial automation and control
Server power
Electronic system design
Appliances
Electronic system design
FAE Expert Insights
"The MP44010 is a reliable PFC controller that I've used in numerous LED driver and TV power designs. The CRM operation provides good efficiency and low EMI without the complexity of CCM controllers. The integrated protections simplify design and improve reliability. One important design consideration is the inductor selection - CRM requires careful calculation of inductance for the operating range. I typically see 95%+ power factor and <8% THD in production designs. The startup behavior is clean with no overshoot issues. Overall, an excellent choice for PFC applications up to 300W."
Reliable CRM PFC with >0.95 PF and simple design
— James Liu, BeiLuo
Frequently Asked Questions
How do I calculate the PFC inductor value?
For CRM PFC, inductor value L = (Vin_min^2 x D x (1-D)) / (2 x Pout x Fsw_min). Where D is duty cycle at peak of minimum input voltage. Typical inductance ranges from 100µH to 1mH depending on power level. Higher inductance reduces switching frequency but increases core size. Use ferrite cores with low loss at operating frequencies. Gap the core to prevent saturation. MPS provides an Excel calculator for inductor selection.
Download the MP44010 design calculator or contact our FAE team for inductor recommendations.
What is the difference between CRM and CCM PFC?
CRM (Critical Conduction Mode) operates at boundary between continuous and discontinuous conduction, with variable frequency. Benefits include zero-voltage switching, lower EMI, and simpler control. Best for 50W-300W applications. CCM (Continuous Conduction Mode) operates at fixed frequency with continuous inductor current. Benefits include lower peak currents and smaller inductors. Best for 300W+ applications. The MP44010 uses CRM while MP44019 uses CCM for higher power.
Choose CRM for 50-300W, CCM for 300W+ applications. Contact us for topology selection guidance.
How do I meet IEC61000-3-2 harmonic limits?
The MP44010 with proper design easily meets IEC61000-3-2 Class C and D limits. Key design considerations: 1) Adequate inductance for current shaping. 2) Proper multiplier circuit design. 3) Fast loop compensation without 100Hz ripple. 4) Sufficient output capacitance to reduce voltage ripple. 5) Good layout for noise immunity. Typical designs achieve THD <10% and individual harmonics well below limits. MPS reference designs include EMI and harmonic test results.
Follow MPS reference designs or contact us for compliance testing support.
What startup behavior can I expect?
The MP44010 features controlled startup with soft-start function. Upon power-up, the controller charges VCC capacitor through startup resistor. When VCC reaches turn-on threshold (typically 12V), the controller begins switching with gradually increasing duty cycle. The soft-start time is set by external capacitor on COMP pin, typically 10-50ms. This prevents inrush current and output overshoot. The OVP protection is active during startup to prevent overvoltage conditions.
Use MPS startup calculation tools to select appropriate startup resistor and VCC capacitor values.
How do I design the compensation network?
The MP44010 uses a single-pole compensation on the COMP pin. Connect a series RC network from COMP to ground. Typical values: Rcomp = 10-47kΩ, Ccomp = 1-10µF. The compensation sets the voltage loop bandwidth, typically 10-20Hz for PFC applications. Lower bandwidth improves power factor but slows transient response. The capacitor provides low-frequency integration for DC regulation. MPS provides loop analysis and compensation design guidelines in the application note.
Use MPS compensation design tools or contact our FAE team for loop stability analysis.