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L6758A Datasheet(PDF) 9 Page - STMicroelectronics |
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L6758A Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 42 page DocID023298 Rev 2 9/42 L6758A Pin description and connection diagrams 42 32 OSC Oscillator pin. It allows the programming of the switching frequency F SW for the multi- phase section. The pin is internally set to 1.0 V, frequency for multi-phase is programmed according to the resistor connected to GND or VCC with a gain of 10 kHz/μA. Leaving the pin floating programs a switching frequency of 200 kHz. Effective frequency observable on the load results as being multiplied by the number of active phases N. See Section 10 for details. 33 VR_RDY VR ready. Open drain output set free after SS has finished in multi-phase section and pulled low when triggering any protection. Pull up to a voltage lower than 3.3 V (typ.), if not used it can be left floating. 34 ENDRV Enable driver. CMOS output driven high when the IC commands the drivers. Used in conjunction with the HiZ window on the PWM pins to optimize the multi- phase section overall efficiency. Connect directly to external driver enable pin. 35 SENDRV Enable driver. CMOS output driven high when the IC commands the drivers. Used in conjunction with the HiZ window on the PWM pins to optimize the single- phase section overall efficiency. Connect directly to external driver enable pin. 36 PWM4 PWM4 output. Connect to external driver PWM input. During normal operation the device is able to manage HiZ status by setting and holding the PWMx pin to fixed voltage. Pull to 5 V through a 1 k resistor to configure the multi-phase section to work at 3 phases. 37 PWM2 PWM2 output. Connect to external driver PWM input. This pin is also used to configure HiZ levels for compatibility with drivers and DrMOS. During normal operation the device is able to manage HiZ status by setting and holding the PWMx pin to pre-defined fixed voltage. 38 PWM3 PWM3 output. Connect to external driver PWM input. During normal operation the device is able to manage HiZ status by setting and holding the PWMx pin to fixed voltage. Pull to 5 V through 1 k resistor in conjunction with PWM4 to configure the multi-phase section to work at 2 phases. 39 PWM1 PWM1 output. Connect to external driver PWM input. This pin is also used to configure HiZ levels for compatibility with drivers and DrMOS. During normal operation the device is able to manage HiZ status by setting and holding the PWMx pin to pre-defined fixed voltage. Table 2. Pin description (continued) Pin# Name Function |
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