PDF MAX98314 Data sheet ( Hoja de datos )

Número de pieza	MAX98314
Descripción	Mono 3.2W Class D Amplifier
Fabricantes	Maxim Integrated Products
Logotipo
Hay una vista previa y un enlace de descarga de MAX98314 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas
No Preview Available ! www.DataSheet.co.kr 19-6124; Rev 0; 11/11 EVALUATION KIT AVAILABLE MAX98314 Mono 3.2W Class D Amplifier with Integrated Input Coupling Capacitors General Description The MAX98314 mono 3.2W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (0dB, 3dB, 6dB, 9dB, and 12dB) set by a single gain-select input (GAIN). Active emissions limiting (AEL) edge rate and overshoot control circuitry and a filterless spread-spectrum modu- lation (SSM) scheme greatly reduce EMI and eliminate the need for output filtering found in traditional Class D devices. The IC’s low 0.95mA at 3.7V, 1.2mA at 5.0V quiescent current extends battery life in portable applications. Highly linear, integrated input coupling capacitors (CIN) reduce solution size and provide excellent THD+N, PSRR, and CMRR performance at low frequencies vs. standard Class D amplifiers using external input capacitors. The IC is available in a small 9-bump, 0.3mm pitch WLP (1.0mm x 1.0mm x 0.80mm) package and is specified over the -40NC to +85NC extended temperature range. Applications Mobile Phones Portable Audio Notebook Computers MP3 Players Netbook Computers VoIP Phones Features S Integrated Input Coupling Capacitors with Excellent Linearity  fC = 100Hz (6dB)  fC = 200Hz (12dB) S Low Quiescent Current  0.95mA at 3.7V  1.2mA at 5.0V S Delivers High Output Power at 10% THD+N  3.2W into 4I, VPVDD = 5V  960mW into 8I, VPVDD = 3.7V S Ultra-Low Noise: 19µV S Eliminates Output Filtering Requirement  Spread Spectrum and Active Emissions Limiting S Click-and-Pop Suppression S Thermal and Overcurrent Protection S Low Current Shutdown Mode S Small, Space-Saving Package Simplified Block Diagram CIN MAX98314 CLASS D CIN MODULATOR AND H-BRIDGE Ordering Information appears at end of data sheet. GAIN CONTROL For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX98314.related �� Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr MAX98314 Mono 3.2W Class D Amplifier with Integrated Input Coupling Capacitors ELECTRICAL CHARACTERISTICS (continued) (VPVDD = VSHDN = VGAIN = 5V, VPGND = 0V, AV = 6dB (GAIN = PVDD), RL = J, RL connected between OUT+ to OUT-, AC measure- ment bandwidth 20Hz to 22kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Thermal Hysteresis 15 NC DIGITAL INPUT (SHDN) Input Voltage High Input Voltage Low Input Leakage Current VINH VINL VPVDD = 2.5V to 5.5V VPVDD = 2.5V to 5.5V TA = +25NC 1.4 V 0.4 V Q1 FA Note 2: All devices are 100% production tested at TA = +25NC. Specifications over temperature limits are guaranteed by design. Note 3: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For RL = 4I, L = 33FH. For RL = 8I, L = 68FH. Note 4: Amplifier inputs AC-coupled to ground. Note 5: Mode transitions controlled by SHDN control pin. Typical Operating Characteristics (VPVDD = VSHDN = 5.0V, VPGND = 0V, AV = 6dB, RL = J, RL connected between OUT+ to OUT-, AC measurement bandwidth 20Hz to 22kHz, TA = +25NC, unless otherwise noted.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 10 VPVDD = 5V ZLOAD = 4I + 33µH 10 VPVDD = 4.2V ZLOAD = 4I + 33µH 10 VPVDD = 3.7V ZLOAD = 4I + 33µH 1 POUT = 2W 1 POUT = 1W 1 POUT = 0.8W 0.1 POUT = 1.5W 0.1 0.1 0.01 0.001 10 100 1k 10k 100k FREQUENCY (Hz) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 10 VPVDD = 5V ZLOAD = 8I + 68µH 1 POUT = 1.2W 0.01 POUT = 0.5W 0.001 10 100 1k 10k 100k FREQUENCY (Hz) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 10 VPVDD = 4.2V ZLOAD = 8I + 68µH 1 POUT = 0.6W 0.01 POUT = 0.2W 0.001 10 100 1k 10k 100k FREQUENCY (Hz) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 10 VPVDD = 3.7V ZLOAD = 8I + 68µH 1 POUT = 0.4W 0.1 0.01 0.001 10 POUT = 0.2W 0.1 0.01 POUT = 0.3W 0.1 POUT = 0.2W 0.01 100 1k 10k FREQUENCY (Hz) 0.001 100k 10 100 1k 10k FREQUENCY (Hz) 0.001 100k 10 100 1k 10k FREQUENCY (Hz) 100k �� Maxim Integrated Products 5 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page www.DataSheet.co.kr MAX98314 Mono 3.2W Class D Amplifier with Integrated Input Coupling Capacitors Assuming zero source impedance, the -3dB corner frequency, f-3dB, is: f-3dB = 1/2GRINCIN [Hz] The 100ppm/V voltage coefficient of the integrated input coupling capacitor results in excellent low-frequency THD+N performance. Figure 2 illustrates the superior linearity of the IC’s integrated input coupling capacitors compared to a similar amplifier with external 0.01FF X7R and X5R 0402 input coupling capacitors. TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 10 VPVDD = 4.2V ZLOAD = 8I + 68µH POUT = 600mW 1.0 X7R CAPS X5R CAPS 0.1 0.01 MAX98314 INTERNAL CAPS 0.001 10 100 1k 10k FREQUENCY (Hz) 100k Figure 2. Low-Frequency THD+N Performance Shutdown The IC features a low-power shutdown mode, drawing < 0.1FA (typ) of supply current. Drive SHDN low to put the IC into shutdown. Click-and-Pop Suppression The speaker amplifier features Maxim’s comprehensive click-and-pop suppression. During startup, the click- and-pop suppression circuitry reduces any audible transient sources internal to the device. When entering shutdown, the differential speaker outputs ramp down to PGND quickly and simultaneously. Applications Information Filterless Class D Operation Traditional Class D amplifiers require an output filter. The filter adds cost and size, and decreases efficiency and THD+N performance. The IC’s filterless modulation scheme does not require an output filter. Because the switching frequency of the IC is well beyond the bandwidth of most speakers, voice coil movement due to the switching frequency is very small. Use a speaker with a series inductance > 10FH. Typical 8I speakers exhibit series inductances in the 20FH to 100FH range. Speaker Amplifier Power-Supply Input (PVDD) PVDD powers the speaker amplifier and ranges from 2.5V to 5.5V. Bypass PVDD with a 0.1FF and 10FF capacitor to PGND. Apply additional bulk capacitance at the device if long input traces between PVDD and the power source are used. Layout and Grounding Proper layout and grounding are essential for optimum performance. Good grounding improves audio perfor- mance and prevents switching noise from coupling into the audio signal. Use wide, low-resistance output traces. As the load impedance decreases, the current drawn from the device increases. At higher current, the resistance of the output traces decrease the power delivered to the load. For example, if 2W is delivered from the device output to a 4I load through 100mI of total speaker trace, 1.904W is delivered to the speaker. If power is delivered through 10mI of total speaker trace, 1.99W is delivered to the speaker. Wide output, supply, and ground traces also improve the power dissipation of the device. The IC is inherently designed for excellent RF immunity. For best performance, add ground fills around all signal traces on top or bottom PCB layers. �� Maxim Integrated Products 11 Datasheet pdf - http://www.DataSheet4U.net/ 11 Page

Páginas	Total 14 Páginas
PDF Descargar	[ Datasheet MAX98314.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
MAX98314	Mono 3.2W Class D Amplifier	Maxim Integrated Products

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar