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MP1740 2.5-5.5V HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER
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pMPS MP1740 — HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER, 2.5-5.5V input./p
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MP1740 2.5-5.5V HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER
The MPS MP1740 is a HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER. It operates from a 2.5 V to 5.5 V input and switches at 250 kHz.
The MP1740 is a high efficiency Class-D H- bridge audio amplifier.
Key Specifications
| Part Number | MP1740 |
| Function | HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER |
| Input Voltage | 2.5 V to 5.5 V |
| Output Power | 3 W |
| Switching Frequency | 250 kHz |
| Peak Efficiency | 90% |
| Ordering Codes | MP1740 |
Features
- 3W Into 4Ω with 5 V Supply @ 10% THD+N
- Efficiency up to 90% at 1.7W Pout, 8 ohm load
- 2.5V to 5.5V Supply Voltage Operation
- THD+N = 0.1% @ 1.8W, 5V, 4Ω
- 2mA Quiescent current and 0.5μA shutdown current
- Full Bridge Output Drive
- Internal 250kHZ Switching frequency
- Fully Differential input
- Improved CMRR Eliminates Two Input Coupling Capacitors
- 1ms start-up time Eliminates pop
Typical Application Circuit
Applications
- Wireless or Cellular Handsets
Design Notes
- The output LC filter corner should sit well below the modulation frequency but above the audio band; component tolerance shifts it more than the nominal value suggests.
- Switching residuals on the speaker leads are best handled at layout — keep the filter close to the amplifier pins.
- Power supply rejection is frequency dependent, so a clean rail still matters at the modulation harmonics.
- The exposed pad is the thermal path; solder it to a copper area sized for continuous output power, not for idle.
Common Questions
What input voltage does the MP1740 support?
2.5 V to 5.5 V.
What are the defining features of the MP1740?
3W Into 4Ω with 5 V Supply @ 10% THD+N Efficiency up to 90% at 1.7W Pout, 8 ohm load
Shenzhen Gaorunxin Technology Co., Ltd
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