L6727 查看數據表（PDF） - STMicroelectronics
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L6727 Datasheet PDF : 22 Pages
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L6727
2
Pins description and connection diagrams
Pins description and connection diagrams
Figure 3. Pins connection (top view)
BOOT
UGATE
GND
LGATE
1
8
2
7
3 L6727 6
4
5
PHASE
COMP / DIS / OC
FB
VCC
2.1
Pin descriptions
Table 2.
Pin #
Pins descriptions
Name
Function
HS Driver Supply.
1
BOOT 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.
All internal references, logic and drivers are connected to this pin.
3
GND
Connect to the PCB ground plane.
4
LGATE LS Driver Output. Connect to LS mosfet gate.
Device and LS Driver power supply.
5
VCC
Operative range from 4.1V to 13.2V. Filter with at least 1µF MLCC to GND.
Error Amplifier Inverting Input.
6
FB
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.
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
7
COMP / DIS
/ OC
disable the device, the external pull-down need to overcome 10mA of
COMP output current for about 15µs. Once disabled, COMP output current
drops to 20µA.
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.
HS Driver return path, current-reading and adaptive-dead-time monitor.
8
PHASE
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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