LM4673
- Mono Class D Operation
- No Output Filter Required for Inductive Loads
- Externally Configurable Gain
- Very Fast Turn On Time: 17μs (typ)
- Minimum External Components
- "Click and Pop" Suppression Circuitry
- Micro-Power Shutdown Mode
- Available in Space-Saving 0.4mm Pitch DSBGA and WSON Packages
Key Specifications
- Efficiency at 3.6V, 400mW into 8Ω Speaker 88% (typ)
- Efficiency at 3.6V, 100mW into 8Ω Speaker 80% (typ)
- Efficiency at 5V, 1W into 8Ω Speaker 86% (typ)
- Quiescent Current, 3.6V Supply 2.1mA (typ)
- Total Shutdown Power Supply Current
0.01µA (typ) - Single Supply Range 2.4V to 5.5V
- PSRR, f = 217Hz 78dB
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The LM4673 is a single supply, high efficiency, 2.65W, mono, Class D audio amplifier. A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.
The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.1W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V.
The LM4673 has high efficiency with speaker loads compared to a typical Class AB amplifier. With a 3.6V supply driving an 8Ω speaker, the IC's efficiency for a 100mW power level is 80%, reaching 88% at 400mW output power.
The LM4673 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).
The gain of the LM4673 is externally configurable which allows independent gain control from multiple sources by summing the signals. Output short circuit and thermal overload protection prevent the device from damage during fault conditions.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM4673 Filterless, 2.65W, Mono, Class D Audio Power Amplifier datasheet (Rev. D) | 2013/05/01 | |
| Application note | Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) | 2019/08/26 | ||
| Application note | AN-1849 An Audio Amplifier Power Supply Design (Rev. C) | 2019/06/27 | ||
| Application note | AN-1497 Filterless Class D Amplifiers (Rev. A) | 2013/05/01 | ||
| Application note | AN-1614 LM48510 Speaker AN- (Rev. B) | 2013/05/01 | ||
| Application note | AN-1737 Managing EMI in Class D Audio Applications (Rev. A) | 2013/05/01 |
설계 및 개발
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LM4673TMBD — LM4673TMBD 무필터, 2.65W, 모노, 클래스 D 오디오 전원 증폭기 평가 보드
The LM4673 is a filterless 2.65W class D fully differential audio amplifier in an 8 pin LLP package. The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. It is capable of delivering 1.24 Watts of average power to an 8 ohm load with less than 1% (...)
PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®
TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| DSBGA (YFQ) | 9 | 옵션 보기 |
| WSON (NGQ) | 8 | 옵션 보기 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.