FAN7529M Fairchild Semiconductor, FAN7529M Datasheet - Page 13

• Manufacturer Part Number: FAN7529M
• Description: IC PFC CTRLR CRM/TRANSITION 8SOP
• Manufacturer: Fairchild Semiconductor

Specifications of FAN7529M

• Mode: Critical Conduction (CRM), Discontinuous (Transition)
• Current - Startup: 40µA
• Voltage - Supply: 12 V ~ 22 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 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

FAN7529 Rev. 1.0.2
© 2006 Fairchild Semiconductor Corporation
4. Over-Current Protection Block
The MOSFET current is sensed using an external sens-
ing resistor for the over-current protection. If the CS pin
voltage is higher than 0.8V, the over-current protection
comparator generates a protection signal. An internal RC
filter is included to filter switching noise.
CS
Figure 36. Over-Current Protection Block
4
40k
8pF
0.8V
Over Current Protection
Comparator
FAN7529 Rev. 00
Signal
OCP
13
5. Switch Drive Block
The FAN7529 contains a single totem-pole output stage
designed for direct drive of the power MOSFET. The
drive output is capable of up to +500/-800mA peak cur-
rent with a typical rise and fall time of 50ns with 1nF load.
The output voltage is clamped to 13V to protect the
MOSFET gate if the V
6. Under-Voltage Lockout Block
If the V
are enabled and start operation. If the V
below 8.5V, most of the internal blocks are disabled to
reduce the operating current. V
higher than 8.5V under normal conditions.
CC
voltage reaches 12V, the IC’s internal blocks
CC
voltage is higher than 13V.
CC
voltage should be
CC
voltage drops
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