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L6727TR Datasheet(PDF) 5 Page - STMicroelectronics |
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L6727TR Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 22 page L6727 Pins description and connection diagrams 5/22 2 Pins description and connection diagrams Figure 3. Pins connection (top view) 2.1 Pin descriptions Table 2. Pins descriptions 1 2 3 4 VCC FB COMP / DIS / OC PHASE LGATE GND UGATE BOOT 5 6 7 8 L6727 Pin # Name Function 1BOOT HS Driver Supply. Connect through a capacitor (100nF) to the floating node (LS-Drain) pin and provide necessary bootstrap diode from VCC. 2 UGATE HS Driver Output. Connect to HS mosfet gate. 3GND All internal references, logic and drivers are connected to this pin. Connect to the PCB ground plane. 4 LGATE LS Driver Output. Connect to LS mosfet gate. 5VCC Device and LS Driver power supply. Operative range from 4.1V to 13.2V. Filter with at least 1 µF MLCC to GND. 6FB Error Amplifier Inverting Input. Connect with a resistor RFB to the output regulated voltage. Additional resistor ROS to GND may be used to regulate voltages higher than the reference. 7 COMP / DIS / OC COMP. Error Amplifier Output. Connect with an RF - CF // CP to FB to compensate the control-loop. DIS. The device can be disabled by forcing this pin lower than 0.5V(typ). To disable the device, the external pull-down need to overcome 10mA of COMP output current for about 15 µs. Once disabled, COMP output current drops to 20 µA. OC. Over current threshold set. Connect with an ROCSET resistor to VCC (ONLY IF VCC is supplied by 5V bus) to program OC threshold. When VCC > 5V, ROCSET need to be not-connected. 8 PHASE HS Driver return path, current-reading and adaptive-dead-time monitor. Connect to the LS drain to sense RdsON drop to measure the output current. This pin is also used by the adaptive-dead-time control circuitry to monitor when HS mosfet is OFF. |
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