XA9220
20W Stereo Class-D Audio Amplifier with Power Limit And Dynamic Temperature Control
产品描述
The XA9220 is a high efficiency stereo class-Daudio amplifier with adjustable power limit function and dynamic temperature control. The loudspeaker driver operates from 8~26V supply voltage and analog circuit operates at 3.3V supply voltage. It can deliver 20W/CH output power into 8Ω loudspeaker within 0.09% THD+N and without external heat sinkwhen playing music.
XA9220 provides parallel BTL (Mono) application, and it can deliver 40W into 4Ω loudspeaker within 0.15% THD+N. The adjustable power limit function allows user to set a voltage rail lower than half of 3.3V to limit the amount of current through the speaker.
Output DC detection prevents speaker damage from long-time current stress. The dynamic temperature control is a gain control system.As chip
junction temperature higher than a warning level, the gain level will decrease until junction temperature lower than the warning level.
The output short circuit and over temperature protection include auto-recovery feature.
主要特点
- Single supply voltage 8 ~ 26V for loudspeaker driver Built-in LDO output 3.3V for others
- Loudspeaker power from 24V supply
- BTL Mode: 20W/CH into 8Ω @0.09% THD+N
- PBTL Mode: 40W/CH into 4Ω @0.15% THD+N
- Loudspeaker power from 13V supply BTL Mode: 10W/CH into 8Ω @10% THD+N
- 87% efficient Class-D operation eliminates need for heat sink
- Differential inputs
- Four selectable, fixed gain settings
- Internal oscillator
- Short-Circuit protection with auto recovery option
- Under-Voltage detection
- Over-Voltage protection
- Pop noise and click noise reduction
- Adjustable power limit function for speaker protection
- Output DC detection for speaker protection
- Filter-Free operation
- Over temperature protection with auto recovery
- Dynamic temperature control prevents chip from over heating
典型应用图
订购资讯
| Part Number | Package | Packing | Comments |
|---|---|---|---|
| XA9220 ER28 | E-TSSOP 28L | 2500 Units/ Reel5000 Units/Small Box | Green |
