bd5468gul-e2 ROHM Co. Ltd., bd5468gul-e2 Datasheet - Page 3

• Manufacturer Part Number: bd5468gul-e2
• Description: Analog Input Monaural Class-d Speaker Amplifier
• Manufacturer: ROHM Co. Ltd.

●Measurement Circuit Diagram
© 2010 ROHM Co., Ltd. All rights reserved.
BD5468GUL
www.rohm.com
<Audio Characteristics Method of Evaluation >
■In case LC filter is not used
■In case LC filter is used
Audio characteristics can be measured to insert LC filter between output pin and speaker load, if you don’t have
measurement equipment for switching amplifier, like AUX-0025, Audio Precision.
Arrange the LC filter directly close to output pin.
In case of L=22μH, C=1μF, cut off frequency becomes:
For Inductor L, please use huge current type.
fc

2

1
LC
Shutdown Signal
Shutdown Signal

H : IC Active
L : IC Shutdown
H : IC Active
L : IC Shutdown
2

22

1
0. 1uF
0. 1uF
0. 1uF
0. 1uF
H
C 2
C 1
C 2
C 1

1

SDNB
SDNB
F
IN +
IN +
IN -
IN -
C 2
A 1
C 1
C 2
A 1
C 1

34kHz
Ri
Ri
Ri
Ri
150k
( Typ .)
150k
(Typ .)
Rf
Rf
Rf
Rf
VDD
VDD
GND
GND
Shutdown
Shutdown
Control
Control
ALC
ALC
B1
B1
A 2
A 2
+Battery
+Battery
3/19
B3
B3
B2
B2
PWM
PWM
BIAS
OSC
BIAS
OSC
PGND
PGND
PVDD
PVDD
(Reference)TDK : SLF12575T-220M4R0
10uF
10uF
C3
C3
Bridge
Bridge
H-
H-
C3
A 3
C3
OUT -
A3
OUT +
AP AUX-0025
BTL
LPF
22uH
22uH
Measurement Instrument
1 uF
Precision
1uF
Audio Precision
Audio
(AP)
(AP )
BTL
Technical Note
2010.09 - Rev.A