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
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