pfcu-3000 Freescale Semiconductor, Inc, pfcu-3000 Datasheet - Page 3

• Manufacturer Part Number: pfcu-3000
• Description: 3000w Single-phase Power Factor Correction Converters
• Manufacturer: Freescale Semiconductor, Inc

SENSITRON
TECHNICAL DATA
DATA SHEET 5112 REV. -
SEMICONDUCTOR
Note:
SYMBOL
N, L
DC+, DC-
L_EN
ON
COM
12V
TEMP
TYPICAL APPLICATION
Figure 2 illustrates the configuration of 3000W single-phase PFC converter in a typical application.
External capacitor filter is required at the PFC converter output. Selection of the output capacitor is
usually determined by the switching frequency ripple current, the second harmonic ripple current, the
DC voltage, the output ripple voltage and the hold-up time. All electrical characteristics in this
datasheet are tested with an output capacitor of 1400μF, which generates maximum 20V peak-peak
2
The inrush current is limited by an internal 15 ohm surge resistor. To reduce power loss, the resistor is
shorted after the PFC is powered up for 350m sec, no matter if the PFC converter is enabled. Having
a heavy load connected to the PFC output during start-up time will delay the charge of the output
capacitor, and may result in high input current spikes. If customer load does not have under voltage
lockout, it is recommended to insert a switch (e.g. a relay), controlled by the pin “L_EN”, between the
load and the output capacitor, as shown in Figure 2. “L_EN” changes its status when the output
voltage reaches 365VDC. The logic of “L_EN” is configurable.
AC Line
PIN Description
nd
harmonic ripple voltage.
1) When the output power is below 10% of the rated power, the input current will be significantly distorted.
However, the output voltage remains in regulation.
2) Not tested on actual units. Ensured by design.
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AC line inputs
DC outputs
Load enable pin. Open collector output with an internal 100 ohm resistor. Maximum collector
current is 100mA. When Vo is lower than 365V, L_EN is shorted to “COM”.
PFC enable pin. When “ON” pin is connected to COM, PFC is enabled. Otherwise, PFC is
disabled and Vo is the rectified AC input voltage.
Control Signal Reference. Connected to “DC-“internally.
Bias Voltage Supply. Output current up to 20mA.
Substrate temperature sensor output. 10mV/ Kelvin Or (TEMP
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EMI
Filter
Figure 2. Typical application of 3000W single-phase PFC converter
L
N
DESCRIPTION
L_EN
PFC
DC+
DC-
×
100 −
273
PFCU-3000
)
o
C
Load