BM28723AMUV
I/O Equivalence Circuits – continued
Pin
No.
13
Pin Name
ERRORX
Pin Voltage
3.3V
Pin Explanation
I/O Equivalence Circuit
Error flag pin
Connect pull-up resistor.
High: Normal operation
Low: Error
500Ω
13
Caution: An error flag is indicated when Output Short
Protection, DC Voltage Protection for speaker, and High
Temperature Protection are activated. The flag shows the LSI
condition during operation.
8
Don’t use for the protection except this product.
14
28
15
NC
-
No-Connection Pin
Don’t connect anything.
Boot strap pin, CH2 negative
Connect a capacitor from pin to OUT2N.
PWM output pin, CH2 negative
-
BSP2N
OUT2N
-
17
27
16
VCCP2 to 0V
Connect pin to output LPF.
15, 19
16, 20
Caution 1: If this pin is shorted to GND, the LSI may break.
Caution 2: When Reset ON or Mute ON, all output transistors
are OFF and output pins are pulled down by 10kΩ (Typ).
17
18
19
VCCP2
GNDP2
BSP2P
VCCP2
0V
Power supply pin for CH2
Power GND pin for CH2
Boot strap pin, CH2 positive
18
-
Connect a capacitor from pin to OUT2P.
PWM output pin, CH2 positive
20
OUT2P
VCCP2 to 0V
Connect pin to output LPF.
Caution 1: If this pin is shorted to GND, the LSI may break.
Caution 2: When Reset ON or Mute ON, all output transistors
are OFF and output pins are pulled down by 10kΩ (Typ).
21
OUT1N
VCCP1 to 0V
PWM output pin, CH1 negative
Connect pin to output LPF.
24
27
Caution 1: If this pin is shorted to GND, the LSI may break.
Caution 2: When Reset ON or Mute ON, all output transistors
are OFF and output pins are pulled down by 10kΩ (Typ).
22, 26
21, 25
22
23
24
25
BSP1N
GNDP1
VCCP1
OUT1P
-
0V
Boot strap pin, CH1 negative
Connect a capacitor from pin to OUT1N.
Power GND pin for ch1
VCCP1
Power supply pin for ch1
23
VCCP1 to 0V
PWM output pin, CH1 positive
Connect to output LPF.
Caution 1: If this pin is shorted to GND, the LSI may break.
Caution 2: When Reset ON or Mute ON, all output transistors
are OFF and output pins are pulled down by 10kΩ (Typ).
26
BSP1P
-
Boot-strap pin of ch1 positive
Connect a capacitor from pin to OUT1P.
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TSZ02201-0C1C0E900720-1-2
31.Aug.2018 Rev.001
© 2018 ROHM Co., Ltd. All rights reserved.
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TSZ22111 • 15 • 001
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