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908E622 Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc |
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908E622 Datasheet(HTML) 39 Page - Freescale Semiconductor, Inc |
39 / 63 page Analog Integrated Circuit Device Data Freescale Semiconductor 39 908E622 FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES CRM — Current Recirculation Mode bit This read/write bit selects the recirculation mode during PWM. Reset clears the CRM bit. 1 = recirculation via switched on low side MOSFET 0 = recirculation via low side free wheeling diode HBxOCF — Half-bridges Over-current Flag Bit This read/write bit indicates that an over-current condition on either the LS or the HS FET on HBx has occurred. Clear HBxOCF and enable Half-bridge by writing a logic [1] to HBxOCF. Writing a logic [0] to HBxOCF has no effect. Reset clears the HBxOCF bit. 1 = over-current condition on HBx occurred 0 = no over-current condition on HBx High Side Drivers The high side outputs are low resistive high side switches targeted for driving lamps. The high sides are protected against over-temperature, over-current and over-voltage/ under-voltage. Figure 23. HS Circuitry HIGH SIDE OPERATING MODES The high sides outputs are enabled if the PSON bit in the System Control Register (SYSCTL) is set. Each high side output is permanently switched on, if the HSxON bit in the High Side Output Register (HSOUT) is set. PWM control of the output is enabled, if the HSxPWM bit High Side Output Register (HSOUT) is set. In this operating mode, the high side MOSFET is on, if the input PWM signal (PWM pin) is high. Table shows the behavior of the high side MOSFETs depending on the HSONx and PWMHSx bits. VSUP HSx HS - Driver charge pump over-current protection inrush current limiter PWM Control on/off Current Limit Status PSON HSxON HSxPWM PWM |
Similar Part No. - 908E622_12 |
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Similar Description - 908E622_12 |
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