IR1167(A,B)S

10

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© 2013 International Rectifier

Nov 6, 2013

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 GND should be placed as close as possible to

the IR1167S. This pin is internally clamped.

OVT: Offset Voltage Trimming

The pin can be optionally tied to ground, to VCC or left floating, to select 3 ranges of input offset trimming.

MOT: Minimum On Time

become active and turn on the power FET. Spurious ringings and oscillations can trigger the input comparator off. The MOT

blanks the input comparator keeping the FET on for a minimum time.

The MOT is programmed between 200ns and 3us (typ.) by using a resistor referenced to GND.

EN: Enable

This pin is used to activate the IC “sleep” mode by pulling the voltage level below 2.5V (typ). In sleep mode the IC will

consume a minimum amount of current. However all switching functions will be disabled and the gate will be inactive. The EN

pin voltage cannot linger between the Enable low and Enable high thresholds. The pin is intended to operate as a switch with

the pin voltage either above or below the threshold range. The Enable control pin (EN) is not intended to operate at high

frequency. For proper operation, EN positive pulse width needs to be longer than 20µs, EN negative pulse width needs to be

longer than 10µs.

Please refer to Figure 22B for the definition of EN pulse width.

VD: Drain Voltage Sense

VD is the voltage sense pin for the power MOSFET Drain. This is a high voltage pin and particular care must be taken in

properly routing the connection to the power MOSFET drain.

Additional filtering and or current limiting on this pin is not recommended as it would limit switching performance of the IC.

VS: Source Voltage Sense

VS is the differential sense pin for the power MOSFET Source. This pin must not be connected directly to the power ground

pin (7) but must be used to create a Kelvin contact as close as possible to the power MOSFET source pin.

GND: Ground

This is ground potential pin of the integrated control circuit. The internal devices and gate driver are referenced to this point.

GATE: Gate Drive Output

This is the gate drive output of the IC. Drive voltage is internally limited and provides 2A peak source and 7A peak sink

capability. Although this pin can be directly connected to the power MOSFET gate, the use of minimal gate resistor is

recommended, especially when putting multiple FETs 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.