bd5445efv ROHM Co. Ltd., bd5445efv Datasheet - Page 15

• Manufacturer Part Number: bd5445efv
• Description: Analog Input / Single End Output Class-d Speaker Amplifier
• Manufacturer: ROHM Co. Ltd.

●Control pins function
①GAIN0, GAIN1 function
②MUTEX, PDX function
③MS function
※ Please connect ROSC terminal (pin 9) to 22kohm resister for setting master mode.
※ Please connect to the following filter, and input clock (duty = 50%) to OSC terminal (pin 12) for setting slave mode.
※ High level input voltage (Max.voltage) of tease control pin is equal to Vcc voltage. But absolute max.voltage of
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BD5445EFV
www.rohm.com
PWM Sampling frequency is sited from input clock. If input clock have noise (ex.Jitter), noise appear to Speaker output.
In0(pin4),ROSC(pin9),OSC(pin12) and REG_G(pin14) is 5.3V. Tease pins may break, when short next pins. If these pins
short to Vcc, connecting through 10k Ω resister prevent IC from destruction.
MUTEX
(Pin 11)
(13pin)
GAIN1
(Pin 3)
MS
H
H
H
H
H
L
L
L
L
L
(Pin 10)
GAIN0
(Pin 2)
PDX
H
H
H
H
L
L
L
L
Master mode
Slave mode
Fig.32 ROSC terminal filter circuit for setting slave mode.
Mode
10kΩ
Amplifier Gain (SE)
Normal operation
Speaker output
HiZ_Low
Vcc
14dB
20dB
26dB
32dB
Mute
15/31
Fig.33
BD5445EFV
Forbidden
pin2
pin3
pin10
pin11
pin13
Amplifier Gain (BTL)
Power down
20dB
26dB
32dB
38dB
OFF
OFF
ON
Technical Note
2010.05 - Rev.B