FAN7528N Fairchild Semiconductor, FAN7528N Datasheet - Page 3

• Manufacturer Part Number: FAN7528N
• Description: IC PFC CTRLR CRM/TRANSITION 8DIP
• Manufacturer: Fairchild Semiconductor

Specifications of FAN7528N

• Mode: Critical Conduction (CRM), Discontinuous (Transition)
• Current - Startup: 40µA
• Voltage - Supply: 12 V ~ 23 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FAN7528 Rev. 1.0.6
© 2005 Fairchild Semiconductor Corporation
Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
COMP
MOT
GND
ZCD
OUT
V
INV
CS
CC
This pin is the inverting input of the error amplifier. The output voltage of the boost PFC
converter should be resistively divided to 2.5V at the high line condition and connected
to this pin. If this pin voltage is controlled to be lower than 0.45V, the device is
disabled.
This pin is the output of the transconductance error amplifier. Some components for
the output voltage compensation should be connected between this pin and GND.
This pin is used to set the slope of the internal ramp. The voltage of this pin is
maintained to be 1V. If a resistor is connected between this pin and GND, current flows
out of the pin and the slope of the internal ramp is proportional to this current.
This pin is the input of the over-current protection comparator. The MOSFET current is
sensed using a sensing resistor and the resulting voltage is applied to this pin. An
internal RC filter is included to filter switching noise. This pin is sensitive to the
negative voltage below -0.3V. For proper operation, the stray inductance in the sensing
path and the inductance of the sensing resistor must be minimized.
This pin is the input of the zero current detection block. If the voltage of this pin goes
higher than 1.5V, then lower than 1.4V, the MOSFET is turned on.
This pin is used for the ground potential of all the pins. For proper operation, the signal
ground and the power ground should be separated.
This pin is the gate drive output. The peak sourcing and sinking current level is
400mA. For proper operation, the stray inductance in the gate driving path must be
minimized.
This pin is the IC supply pin. IC current and MOSFET drive current are supplied using
this pin.
Figure 3. Pin Configuration (Top View)
V
INV
8
1
CC
F A N 7 5 2 8
COMP
OUT
7
2
3
W W W
GND
MOT
6
3
FAN7528 Rev. 1.00
Description
ZCD
CS
5
4
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