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FAN7529 Datasheet(PDF) 13 Page - Fairchild Semiconductor |
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FAN7529 Datasheet(HTML) 13 Page - Fairchild Semiconductor |
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13 / 20 page  © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7529 Rev. 1.0.2 13 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. Figure 36. Over-Current Protection Block 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 VCC voltage is higher than 13V. 6. Under-Voltage Lockout Block If the VCC voltage reaches 12V, the IC’s internal blocks are enabled and start operation. If the VCC voltage drops below 8.5V, most of the internal blocks are disabled to reduce the operating current. VCC voltage should be higher than 8.5V under normal conditions. 8pF 40k CS Over Current Protection Comparator 4 0.8V OCP Signal FAN7529 Rev. 00 |
Similar Part No. - FAN7529_07 |
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Similar Description - FAN7529_07 |
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