A21SP16

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3 W filter-free class-D audio power amplifier

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Product overview

Description

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.

  • All 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)

EDA Symbols, Footprints and 3D Models

STMicroelectronics - A21SP16

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
A21SP16J
Active
CSP P 0.5 mm Industrial Ecopack3

A21SP16J

Package:

CSP P 0.5 mm

Material Declaration**:

PDF XML

Marketing Status

Active

Package

CSP P 0.5 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

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A21SP16J Available at distributors

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Active
EAR99 NEC Tape and Reel CSP P 0.5 mm - - CHINA

A21SP16J Active

Package:
CSP P 0.5 mm
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

A21SP16J

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

CHINA

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Distributor reported inventory date:

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors