FAN7093-F085
FAN7093-F085 Datasheet
FAN7093_F085 High Current PN Half Bridge
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FAN7093-F085 |
FAN7093-F085 (pdf) |
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| FAN7093_F085 High Current PN Half Bridge December 2011 FAN7093_F085 High Current PN Half Bridge Rectifier 47 A, Max path resistance at 150 °C 2011 Fairchild Semiconductor Corporation FAN7093_F085 High Current PN Half Bridge December 2011 • Path resistance of max. at 150 °C • Low quiescent current of max. 270 µA • PWM capability of up to 60 kHz combined with active freewheeling • Switched mode current limitation for reduced power dissipation in over current • Current limitation level of typical 46 A • Status flag diagnosis with low and high side current sense capability • Over temperature shut down with latch behavior • Shorted load protection with latch behavior • Over voltage lock out • Under voltage shut down • Driver circuit with logic level inputs • Typical slew rate of 1 V/µs with open SR pin • Adjustable slew rates for optimized EMI TO263-7L Brief functional Description The FAN7093_F085 is an integrated high current half bridge for electric motor drive applications. It contains one P-channel highside MOSFET and one N-channel low-side MOSFET with an integrated control IC in one package. With the P-channel highside switch the need for a charge pump is eliminated and therefore minimizing EMI. Pins IN and logic level inputs and control the half bridge outputs. The diagnostic current output pin IS outputs a proportional current through the half bridge MOSFETS. The IS pin output represents current for either the PChan or the N-Chan depending on which is active. The part is protected against short to Battery or ground, over current, overtemperature, over voltage and under voltage. The FAN7093_F085 provides a cost optimized solution for protected high current PWM motor drives with very low board space consumption. FAN7093_F085 High Current PN Half Bridge December 2011 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 the half-bridge. The diagnostic pin 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 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 Pin configuration Pin assignment FAN7093_F085 High Current PN Half Bridge December 2011 Figure 2 Pin assignment for FAN7093_F085B, FAN7093_F085P and FAN7093_F085S Pin Definitions and Functions VBATT I/O Function Ground Input Defines whether high- or lowside switch is activated Inhibit When set to low device goes in sleep mode and resets over temperature and HS and LS short latch Power output of the bridge Slew Rate The slew rate of the power switches can be adjusted by connecting a resistor between SR and GND Current Sense and Diagnostics |
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