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L6728D 数据表(PDF) 5 Page - STMicroelectronics |
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L6728D 数据表(HTML) 5 Page - STMicroelectronics |
5 / 33 page L6728D Pin description and connection diagram Doc ID 16498 Rev 1 5/33 2 Pin description and connection diagram 2.1 Pin descriptions Figure 3. Pin connection (top view) L6728D Table 2. Pins description Pin n° Name Function 1BOOT HS driver supply. Connect through a capacitor (100 nF) to the floating node (LS-Drain) pin and provide necessary bootstrap diode from VCC. 2 PHASE HS driver return path, current-reading and adaptive-dead-time monitor. Connect to the LS drain to sense RDS(on) 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. 3 UGATE HS driver output. Connect directly to HS MOSFET gate. 4 LGATE / OC LGATE: LS driver output. Connect directly to LS MOSFET gate. OC: Overcurrent threshold set. During a short period of time following VCC rising over the UVLO threshold, a 10 μA current is sourced from this pin. Connect to GND with an ROCSET resistor greater than 5 kΩ to program the OC threshold. The resulting voltage at this pin is sampled and held internally as the OC set point. The maximum programmable OC threshold is 0.55 V. A voltage greater than 0.6 V activates an internal clamp and causes the OC threshold to be set at the maximum value. 5GND All internal references, logic and drivers are connected to this pin. Connect to the PCB ground plane. 6VCC Device and driver power supply. Operating range from 5 V to 12 V. Filter with at least 1 µF MLCC to GND. 7 COMP / DIS COMP: Error amplifier output. Connect with an RF - CF // CP to FB to compensate the device control loop. DIS: The device can be disabled by pushing this pin lower than 0.75 V (typ). By setting the pin free, the device is enabled again. 8FB Error amplifier inverting input. Connect with a resistor RFB to the output regulated voltage. An output resistor divider may be used to regulate voltages higher than the reference. 9 VSEN Regulated voltage sense pin for OVP and UVP protection and PGOOD. Connect to the output regulated voltage, or to the output resistor divider if the regulated voltage is higher than the reference. 10 PGOOD Open drain output set free after SS has finished and pulled low when VSEN is outside the relative window. Pull up to a voltage equal or lower than VCC. If not used it can be left floating. |
类似零件编号 - L6728D |
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类似说明 - L6728D |
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