PDF《NAU82028》

NAU82028 Datasheet Rev 0.

2 Page

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19 Mar,

2013 NAU82028 3.1W Mono Filter-Free Class-D Audio Amplifier with

2 wire interface gain control

1 Description The NAU82028 is a mono high efficiency filter-free Class-D audio amplifier, which is capable of driving a 4? load with up to 3.1W output power. This device provides chip enable pin with extremely low standby current and fast start-up time of 3.4ms. The NAU82028 features a highly flexible

2 wire interface with many useful gain settings. The gain can be selected from 12dB to C20.5dB (plus mute) by using

2 wire interface. The NAU82028 is ideal for the portable applications of battery drive, as it has advanced features like 93% efficiency, ultra low quiescent current (i.e. 2.0 mA at 3.6V) and superior EMI performance. It has the ability to configure the inputs in either single-ended or differential mode. NAU82028 is available in Miniature WCSP-9 (1.56mm x 1.52mm in 0.5mm pitch) package. Key Features ? Low Quiescent Current: ? 2.0mA at 3.6V ? 3.1mA at 5V ? Gain Setting with

2 wire interface ? 12dB to -19.3dB (plus mute) ? Powerful Mono Class-D Amplifier: ? 3.1W (4? @ 5V, 10% THD+N) ? 2.46W (4? @ 5V, 1% THD+N) ? 1.77W (8? @ 5V, 10% THD+N) ? 1.41W (8? @ 5V, 1% THD+N) ? Low Output Noise:

26 ?VRMS (A CWeighted @3.6V) ? Low Current Shutdown Mode ? Click-and Pop Suppression ? 1.56mm x 1.52mm in WCSP (0.5mm Pitch) ? 1.54 W (4? @ 3.6V, 10% THD+N) ? 1.26 W (4? @ 3.6V, 1% THD+N) ? 0.9 W (8? @ 3.6V, 10% THD+N) ? 0.76 W (8? @ 3.6V, 1% THD+N) Applications ? Smartphones ? Tablet PCs ? Personal Navigation Devices NAU82028 Datasheet Rev0.2 Page

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19 Mar,

2013 NAU82028 Block Diagram

2 Pin out Part Number Dimension Package Package Material NAU82028VG 1.56mm x 1.52mm 9-bump WCSP (0.5mm pitch) Green

3 Pin Descriptions Pin # Name Type Functionality A1 VSS Supply High Current Ground A2 SCL Clock I2C Clock A3 SDA Data I2C Data B1 VOUTP Analog Output Positive BTL Output B2 EN Digital Input Chip Enable (High = Power Up;

Low = Power Down) B3 VIP Analog Input Positive Differential Input C1 VOUTN Analog Output Negative BTL Output C2 VDD Supply Power Supply C3 VIN Analog Input Negative Differential Input Table

1 NAU82028 Pin description NAU82028 Datasheet Rev0.2 Page

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2013 Operating Characteristics Conditions: EN = VDD =3.6V, VSS = 0V, Av = 12dB, ZL = ∞, Bandwidth = 20Hz to 22kHz, TA =

25 °C;

unless otherwise noted Parameter Symbol Comments/Conditions Min Typ Max Units Power Delivered Output Power Pout ZL = 4? + 33?H THD + N = 10% VDD = 5.0V 3.1 W VDD = 3.6V 1.54 ZL = 4? + 33?H THD + N = 1% VDD = 5.0V 2.46 VDD = 3.6V 1.26 ZL = 8? + 68?H THD + N = 10% VDD = 5.0V 1.77 VDD = 3.6V 0.90 ZL = 8? + 68?H THD + N = 1% VDD = 5.0V 1.41 VDD = 3.6V 0.76 Parameter Symbol Comments/Conditions Min Typ Max Units Chip Enable (EN) Voltage Enable High VEN_H VDD = 2.5V to 5.5V 1.3 V Voltage Enable Low VEN_L VDD = 2.5V to 5.5V 0.35 V Input Leakage Current 0.1 2.0 ?A Thermal and Current Protection Thermal Shutdown Temperature

150 °C Thermal Shutdown Hysteresis

20 °C Limiting Current ILIMIT 2.0 A Single Ended Input Resistance RIN AV = 12dB

75 k? Parameter Symbol Comments/Conditions Min Typ Max Units Normal Operation Quiescent Current Consumption IQUI VDD = 3.6V 2.0 mA VDD = 5V 3.1 mA Shut Down Current IOFF EN =

0 0.1 ?A Oscillator Frequency fOSC

300 kHz Efficiency η WCSP (ZL=8Ω)

93 % Start Up Time Tstart 3.4 ms Output Offset Voltage VOS ±1 mV Common Mode Rejection Ratio CMRR fIN = 217Hz

65 dB Click-and-Pop Suppression 1Hz Shutdown (ZL=8Ω)