MP44014-A – BOUNDARY MODE PFC CONTROLLER
MP44014-A Rev. 1.01 www.MonolithicPower.com 9
11/10/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 FB
Feedback. The output voltage is fed into FB through a resistor divider. Also, FB can be used
as an enable and disable pin.
2 COMP Output of the Error Amplifier. A compensation network is connected between COMP and FB.
3 MULT
Input of the Multiplier. Connect MULT to the rectified main voltage via a resistor divider to
provide the sinusoidal reference for the current control loop.
4 CS
Current Sense. The current through the MOSFET is fed into CS via a resistor. The resulting
voltage on CS is compared with the output of the internal multiplier to get an internal
sinusoidal-shaped reference, which determines the MOSFETs turn-on signal. The on-chip
RC filter reduces high-frequency noise on CS.
5 ZCS
The Zero-Crossing Current-Sensing Input of the Inductor. A negative-transition edge triggers
the MOSFETs turn-on signal.
6 GND Ground.
7 GATE
Gate Driver Output. The high output current of the gate driver is able to drive the low-cost
power MOSFET. The high-level voltage of GATE is clamped to 12V in case GATE is supplied
with a high VCC.
8 VCC
Supply Voltage of Both the Signal Path of the IC and the Gate Driver. A bypass capacitor
from VCC to ground is needed to reduce noise.
