FDMF6704A_09 FAIRCHILD [Fairchild Semiconductor], FDMF6704A_09 Datasheet - Page 10

• Manufacturer Part Number: FDMF6704A_09
• Description: The Xtra Small, High Performance, High Frequency DrMOS Module
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FDMF6704A Rev. F
Application Information
Supply Capacitor Selection
For the supply input (VCIN) of the FDMF6704A, a local ceramic
bypass capacitor is recommended to reduce the noise and to
supply the peak current. Use at least a 1 F, X7R or X5R
capacitor. Keep this capacitor close to the FDMF6704A VCIN
and PGND pins.
Bootstrap Circuit
The bootstrap circuit uses a charge storage capacitor (C
as shown in Figure 23. A bootstrap capacitance of 100nF, X7R
or X5R capacitor is adequate. A series bootstrap resistor would
be needed for specific application in order to improve switching
noise immunity.
Typical Application
V
VCC
PWM
Controller
V
IN
5V
12V
5V
Signal
GND
EN
CGND
Power
SMOD#
GND
PWM1
PWM2
PWM3
PWM4
Figure 23. Typical Application
BOOT
SMOD#
VIN
SMOD#
VIN
SMOD#
VIN
SMOD#
VIN
),
PWM
DISB#
PWM
DISB#
PWM
DISB#
PWM
DISB#
CGND
CGND
CGND
CGND
10
FDMF6704A
FDMF6704A
FDMF6704A
FDMF6704A
VDRV
VDRV
VDRV
VDRV
VCIN Filter
The VDRV pin provides power to the gate drive of the high side
and low side power FET. In most cases, it can be connected
directly to VCIN, the pin that provides power to the logic section
of the driver. For additional noise immunity, an RC filter can be
inserted between VDRV and VCIN. Recommended values
would be 10 Ohms and 1 F.
PHASE
PHASE
PHASE
PHASE
VSWH
VSWH
VSWH
VSWH
PGND
PGND
PGND
PGND
VCIN
VCIN
VCIN
VCIN
BOOT
BOOT
BOOT
BOOT
R
R
R
R
BOOT
BOOT
BOOT
BOOT
C
C
C
C
L
L
L
L
OUT
OUT
BOOT
OUT
BOOT
BOOT
BOOT
OUT
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V
OUT