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低消費アンプでバッテリー長持ち
Low Power Consumption Prolongs Battery Life
ワイヤレススピーカ向け 低消費電力D級アンプ
Low Power Class D Amp for Wireless Speakers
BD28411MUV
Features
●低消費電力
無音時 18mA(50%減) スタンバイ0.01mA
Low power consumption :
18mA quiescent (reduced 50%), 0.01mA standby
●小型パッケージ VQFN032V5050
Compact package (VQFN032V5050)
●出力パワー 12+12W 6Ω
Output power : 12W + 12W, 6Ω
Applications
VQFN032V5050
(5 × 5 × 1mm)
●ワイヤレススピーカー
Wireless speakers
●バッテリ搭載モバイルスピーカー
Battery-driven portable speakers
Block Diagram
AM Interference Avoidance
μ_con
Without AM Interference Avoidance
4.7μ
REGG
10μ
PWM
0.1μ
1μ
IN2P
1μ
IN2N
PLIMIT
5
BSP1P
22
DRIVER
FET
LDO
REGG
20
DRIVER
FET
6
18
7
REGG
OSC
10
11
CONTROL I/F
12
Other
device
FSEL0
SYNC
9
13
14
10μ
OUT1N
AM
AM
AM
Station Station Station
522k
0.68μF
10μH
BSP2P
Frequency
17
Shifting the PWM frequency prevents possible interference
0.68μF
GNDP2
OUT2N
10μH
0.68μF
0.68μF
With
AM Interference Avoidance
10μH
15
1701k
ＰＷＭ周波数域をシフトすることで干渉を防止
BSP1N
19 OUT2P
PWM
8
GNDP1
0.68μF
REGG
21
GAIN
10μH
0.68μF
23
DRIVER
FET
AM
Frequency Band
0.68μF
OUT1P
Shift
No Interference
0.68μF
16
BSP2N
GAIN_MS_SEL
3
4
25
DRIVER
FET
MUTEX
REGG
26
REGG
FSEL2
GNDA
27
PWM Freq
Interference
24
2
FSEL1
PLIMIT
VCCP1
28
VCCA
NC
29
PWM
REGG
REGG
30
CONTROL
I/F
VCCP2
IN1N
31
PROTECT
1
NC
1μ
IN1P
NC
32
1μ
TEST
PDX
ERROR
10k
PWM
Freq
AM
Frequency Band
0.1μ
522k
μ_con
AM
AM
AM
Station Station Station
1701k
Frequency
Power Comparison
40
Icc (mA)
VCC = 12V, Ta = 25°C
R_load = 8Ω
No signal
Longer operating time
50
スタンバイ時
60
Power-Down Current
39
54%
30
Down
20
18
50
VCC = 12V, Ta = 25°C
R_load = 8Ω
Power down
I (mA)
無音再生時
Quiescent Current
99.98%
30
Down
20
10
0
0
BD28411
50
40
10
Conventional
Lower standby current
0.01
Conventional
BD28411