A21SP16:3 W filter-free class-D audio power amplifier

The A21SP16 is a differential class-D BTL power amplifier. It is able to drive up to 2.3 W into a 4 Ω load and 1.4 W into a 8 Ω load at 5 V. It achieves outstanding efficiency (88% typ.) compared to classical Class-AB audio amps.

The gain of the device can be controlled via two external gain-setting resistors. Pop & click reduction circuitry provides low on/off switch noise while allowing the device to start within 5 ms. A standby function (active low) allows the reduction of current consumption to 10 nA typ.

Key Features

  • Operating from VCC = 2.4 V to 5.5 V
  • Standby mode active low
  • Output power: 3 W into 4 Ω and 1.75 W into 8 Ω with 10% THD+N max and 5 V power supply
  • Output power: 2.3 W @ 5 V or 0.75 W @ 3 V into 4 Ω with 1% THD+N max
  • Output power: 1.4 W @ 5 V or 0.45 W @ 3 V into 8 Ω with 1% THD+N max
  • Adjustable gain via external resistors
  • Low current consumption 2 mA @ 3 V
  • Efficiency: 88% typ.
  • Signal to noise ratio: 85 dB typ.
  • PSRR: 63 dB typ. @ 217 Hz with 6 dB gain
  • PWM base frequency: 250 kHz
  • Low pop & click noise
  • Thermal shutdown protection
  • Available in flip-chip 9 x 300 μm (Pb-free)
产品规格
DescriptionVersionSize
DS10233: 3 W filter-free class-D audio power amplifier1.0856 KB
简报
DescriptionVersionSize
ST offering in Wearable - Analog and Mixed Signal Portfolio3.01 MB
手册
DescriptionVersionSize
Brochure Wearables08156 MB
ST’s solutions for mobile devices3.23 MB
样片和购买
型号PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
A21SP16JChip Scale Package 0.5mm pitchTape And Reel--0.41000NECEAR99-
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
A21SP16JChip Scale Package 0.5mm pitchIndustrialEcopack3md_qb-wspc-csps0.5-wspc-7-10_ekqb-wspc-4962duj.pdf
md_qb-wspc-csps0.xml
3 W filter-free class-D audio power amplifier A21SP16
Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects TS4999
High-performance class-G stereo headphone amplifier A22H165
1.2 megapixel high dynamic range image sensor VD8640
md_qb-wspc-csps0.5-wspc-7-10_ekqb-wspc-4962duj.pdf TS4962M
md_qb-wspc-csps0.xml TS4990