FAN7093 FAIRCHILD [Fairchild Semiconductor], FAN7093 Datasheet - Page 3

• Manufacturer Part Number: FAN7093
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FAN7093_F085
High Current PN Half Bridge
December 2011
3
Block Diagram
The FAN7093_F085 is a high current half-bridge and contains three separate chips in one package:
One P-channel high-side MOSFET and one N-channel low-side MOSFET together with a control IC.
All three chips are mounted on one common lead frame, using chip on chip and chip by chip
technology. The power FETs are vertical MOS transistors to ensure minimum on state resistance.
Using a P-channel high-side switch eliminates a charge pump and reduces EMI. A microcontroller is
able to control the logic level inputs IN and
of the half-bridge. The diagnostic pin IS is a current
output stage which delivers a proportional current through the P-channel and N-channel MOSFETS
depending on which is being activated with IN/
pin forcing conditions. In case of a short to
VBATT or ground the IS pin acts as an error Flag, which can be detected as a logic high level through
an attached microcontroller. In an over current situation the control IC turns off the MOSFETS and
retries to turn them back on after a cool down time of typical 140us. The control IC protects the
MOSFETS also against over voltage, under voltage and over temperature. The dead time to prevent
shoot through between P- and N- channel MOSFET is generated by the control IC too. The slew rate of
the outputs can be adjusted through an external resistor connected to the SR pin. The FAN7093_F085
can be combined with other FAN7093_F085 to form Full-bridge and also 3-phase drive configurations.
Figure 1 FAN7093_F085 Block diagram
FAN7093_F085 Rev. C1
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