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参数资料
| 型号： | AK4201EU |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.065 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO12 |
| 封装： | 2.90 X 2.20 MM, 0.50 MM PITCH, USON-12 |
| 文件页数： | 13/13页 |
| 文件大小： | 239K |
| 代理商： | AK4201EU |
[AK4201]
MS1077-E-00
2009/05
- 9 -
OPERATION OVERVIEW
■ Charge Pump Circuit
The charge pump operates by the output of a regulator which uses PVDD voltage. The negative power supply (PVEE) for
headphone amplifiers is generated from internal charge pump circuit. The external capacitors are showed in Figure 3.
Low ESR (Equivalent Series Resistance) capacitors with 1uF to 2.2uF (+/-35% or less difference including temperature
drift and a deviation over samples) are recommended for C1 and C2. The minimum value of capacitors should be more
than 0.65uF if temperature drifts and a deviation over samples are big.
PVEE pin
Charge Pump Circuit
CN pin
C2: 1uF
CP pin
Headphone-amp negative voltage
C1: 1uF
VSS1
Figure 3. Charge Pump Circuit External Capacitor
■ Headphone-Amp (LOUT/ROUT pins)
Power supply voltage for headphone amplifiers is supplied by a regulator for positive power and a charge-pump for
negative power. The headphone amplifier output is single-ended and centered on VSS1(0V). Therefore, a capacitor for
AC-coupling can be removed. The minimum load resistance is 16. The output impedance is 20 (typ) when
powered-down.
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| AK4201EUP-L | 制造商:AKM Semiconductor Inc 功能描述:AK4201EUP-L |
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