IR11682S

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11

Detailed Pin Description

VCC: Power Supply

This is the supply voltage pin of the IC and it is monitored by the under voltage lockout circuit. It is possible to

turn off the IC by pulling this pin below the minimum turn off threshold voltage, without damage to the IC.

To prevent noise problems, a bypass ceramic capacitor connected to Vcc and COM should be placed as

close as possible to the IR11682. This pin is not internally clamped.

GND: Ground

This is ground potential pin of the integrated control circuit.

The internal devices and gate driver are

referenced to this point.

VD1 and VD2: Drain Voltage Sense

These are the two high-voltage pins used to sense the drain voltage of the two SR power MOSFETs. Routing

between the drain of the MOSFET and the IC pin must be particularly optimized.

Additional RC filter in not necessary but could be added to VD1 and VD2 pins to increase noise immunity.

For applications which VD voltage exceeds 100V, a 1Kohm to 2Kohm VD resistor is recommended to be

added between the drain of SR MOSFET and VD pin. The VD resistor helps to limit the switching loss of VD

pins.

VS1 and VS2: Source Voltage Sense

These are the two differential sense pins for the two source pins of the two SR power MOSFETs. This pin

must not be connected directly to the GND pin (pin 7) but must be used to create a Kelvin contact as close as

possible to the power MOSFET source pin.

GATE1 and GATE2: Gate Drive Outputs

These are the two gate drive outputs of the IC. The gate voltage is internally clamped and has a +1A/-4A

peak drive capability. Although this pin can be directly connected to the synchronous rectifier (SR) MOSFET

gate, the use of gate resistor is recommended (specifically when putting multiple MOSFETs in parallel). Care

must be taken in order to keep the gate loop as short and as small as possible in order to achieve optimal

switching performance.