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PDF MAX98372 Data sheet ( Hoja de datos )
| Número de pieza | MAX98372 | |
| Descripción | Digital Input Class D Amplifier | |
| Fabricantes | Maxim Integrated | |
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MAX98372
EVALUATION KIT AVAILABLE
Digital Input Class D Amplifier
with DHT and Brownout Protection
General Description
The MAX98372 is a high-efficiency, mono Class D audio
amplifier featuring dynamic headroom tracking (DHT)
and brownout protection. DHT automatically optimizes
the headroom available to the Class D amplifier as the
power supply voltage varies, due to sudden transients
and declining battery life to maintain a consistent listening
experience. A wide 5.5V to 18V supply range allows the
device to reach 19W into an 8Ω load.
The MAX98372’s flexible digital audio interface (DAI)
supports I2S, left-justified, and TDM formats. The digital
audio interface accepts 32kHz, 44.1kHz, 48kHz, 88.2kHz,
and 96kHz sample rates with 16-/24-/32-bit data sup-
ported for all data formats. In TDM mode, the device can
support up to 16 channels of audio data. A unique clock-
ing structure eliminates the need for an external MCLK
signal that is typically needed for PCM communication.
This reduces pin count and simplifies board layout.
Active emissions limiting with edge rate control minimizes
EMI and eliminates the need for output filtering found in
traditional Class D devices.
An 8-bit PVDD supply voltage ADC enables the dynamic
headroom tracking circuit. DHT optimizes audio program
peak behavior as the supply voltage varies and provides
flexible user-defined parameters.
Thermal foldback protection ensures robust behavior
when the thermal limits of the device are exercised. The
circuit can be enabled to automatically reduce the output
power above a user specified temperature. This allows for
uninterrupted music playback even at high ambient tem-
peratures. Traditional thermal protection is also available
in addition to robust overcurrent protection.
All MAX98372 control is performed using a standard
2-wire, I2C interface. One of sixteen slave addresses can
be selected through two, four-level address pins. The IC
is available in a 0.4mm pitch, 30-bump WLP package. It is
specified over the extended, -40°C to +85°C temperature
range.
Applications
●● Tablets
●● Notebook Computers
●● Soundbars
Benefits and Features
●● Wide Supply Range (5.5V to 18V)
●● Dynamic Headroom Tracking Maintains a Consistent
Listening Experience
●● Integrated Thermal Foldback Allows Robust
Operation in a WLP Package
●● Remote Output Sensing Allows Up to 20dB THD+N
Improvement When Ferrites Are Used
●● Class D Edge Rate Control Enables Filterless
Operation
●● 110dB A-Weighted Dynamic Range
●● Output Power at 1% THD+N:
• 15.7W into 8Ω, VPVDD = 17V
• 13.2W into 4Ω, VPVDD = 12V
●● Output Power at 10% THD+N
• 19W into 8Ω, VPVDD = 17V
• 15.8W into 4Ω, VPVDD = 12V
●● Speaker Amplifier Efficiency
• 91% at 10W into 8Ω, VPVDD = 12V
• 81% at 15W into 4Ω, VPVDD = 12V
●● ALC Provides Battery Brownout Protection
●● Extensive Click-and-Pop Suppression
●● Space Saving, 30-Bump WLP Package
(2.2mm x 2.8mm x 0.6mm, 0.4mm Pitch)
Simplified Block Diagram
DVDD
PVDD
MAX98372
I2C
DHT
THERMAL
FOLDBACK
ALC
D
V
O
DAC
L
P
G CLASS D
A
Ordering Information appears at end of data sheet.
19-7734; Rev 1; 1/16
1 page  
MAX98372
Digital Input Class D Amplifier
with DHT and Brownout Protection
LIST OF TABLES (CONTINUED)
Table 11. Signal Path Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 12. PVDD Measurement ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 13. Digital Volume Ramping and Digital Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 14. Digital Gain Settings and Output Voltage Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 15. Speaker Gain Minimum Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 16. Dynamic Headroom Tracking Attack Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 17. Dynamic Headroom Tracking Release Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 18. Dynamic Gain Enables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 19. Limiter Threshold Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 20. Manual Limiter Threshold Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 21. Limiter Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 22. Limiter Attack and Release Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 23. Thermal ADC Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 24. Thermal Foldback Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 25. Thermal Foldback Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 26. ALC Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 27. ALC Attack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 28. ALC Attenuation and Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 29. ALC Infinite Hold Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Table 30. ALC Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Table 31. DHT INFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 33. Thermal and DHT Link Enables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 32. THERM INFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 34. InterChip Communication Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 35. DOUT Double Data Drive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 36. DOUT DHT Receive Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 37. DOUT Thermal Foldback Receive Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 38. DOUT Transmit Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Table 39. DOUT ALC Receive Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 40. Extra BCLK Cycle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 41. Manual High-Impedance Mode Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 42. Speaker Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 43. Spread-Spectrum Modulation Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 44. Clock Monitor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 45. Reset Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 46. Global Enable Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 47. ADDR I2C Address Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 48. Recommended External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX98372
Digital Input Class D Amplifier
with DHT and Brownout Protection
Electrical Characteristics (continued)
(VPVDD = 12V, VDVDD = VRESET = 1.8V, VGND = 0V, CPVDD = 1x 220µF, 2x 10µF, 2x 0.1µF, CREFC = 1µF, CDVDD = 1µF, ZSPK = open,
AC measurement bandwidth 20Hz to 22kHz, fS = 48kHz, 24-bit data, TA = TMIN to TMAX, unless, otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITION
MIN TYP MAX UNITS
ADC Programmable
Lowpass Filter
PVDD_ADC_BW[1:0] = 0x1
PVDD_ADC_BW[1:0] = 0x2
PVDD_ADC_BW[1:0] = 0x3
2
20 Hz
200
DIGITAL I/O CHARACTERISTICS
DIN, BCLK, LRCLK, ADDR_, RESET
Input Voltage High
VIH
0.7 x
VDVDD
V
Input Voltage Low
VIL
0.3 x
VDVDD
V
Input Leakage Current
Input Capacitance
INPUT (SDA, SCL)
IIH, IIL
CIN
-1
3
+1 µA
pF
Input Voltage High
VIH
0.7 x
VDVDD
V
Input Voltage Low
VIL
0.3 x
VDVDD
V
Input Hysteresis
Input Capacitance
Input Leakage Current
OUTPUT (SDA, IRQ)
VHYS
CIN
IIH, IIL
TA = +25°C, input high
200 mV
3 pF
-1 +1 µA
Output Low Voltage
VOL
ISINK = 3mA
Output Current
IOL
DIGITAL AUDIO INTERFACE TIMING CHARACTERISTICS
0.4 V
13 mA
GLOBAL
LRCLK Frequency Range
fLRCLK All DAI operating modes
32
16
96 kHz
Word Length
All DAI operating modes
24 bits
32
BCLK Duty Cycle
45 55 %
Maximum BCLK/LRCLK
Input Jitter
Maximum jitter with RMS jitter below 40kHz
minimal performance
degradation
RMS jitter above 40kHz
0.5
0.9
ns
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Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX98372.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX98371 | Digital Input Class D Speaker Amplifier | Maxim Integrated |
| MAX98372 | Digital Input Class D Amplifier | Maxim Integrated |
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