BD8160AEFV-E2 ROHM [Rohm], BD8160AEFV-E2 Datasheet - Page 14

• Manufacturer Part Number: BD8160AEFV-E2
• Description: 12V Input Multi-channel System Power Supply IC
• Manufacturer: ROHM [Rohm]

●Selecting the Feedforward Capacitor (Boost Converter)
●Selecting the Feedforward Capacitor (Buck converter)
© 2009 ROHM Co., Ltd. All rights reserved.
BD8160AEFV
www.rohm.com
Across the upper resistor R
C
The regulator loop can be compensated by adjusting the exfernal components connected to the COMP pin.
C
The feedforward capacitor across the upper feedback resistor divider sets a zero in the control loop.
Fz
1
2
COMP
,R
will set a zero in the loop together with R
1
2
=11kHZ =
are decided by the following formula.
L=10µH
L=l0µH
Fig.39
Fig.40
C
2
FBB
2πC
R
R
1
2
R
1
1
3
, a bypass capacitor is needed to have a stable converter loop.
2
R
2
C
1
C
3
1
.
C
14/18
1
=
C
3
=
2πfz
1
1
R
2πfz
1
Fz
@L=10µH
2
Fz
@L=10µH
1
=12kHz
1
2
=11kHz
R
3
2009.07 - Rev.B
Technical Note