ZHCST08A December 2022 – September 2023 TAS6424R-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Device Options
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 Recommended Operating Conditions
- 7.3 ESD Ratings
- 7.4 Thermal Information
- 7.5 Electrical Characteristics
- 7.6 Typical Characteristics: Bridge-Tied Load (BTL)
- 7.7 Typical Characteristics: Bridge-Tied Load (BTL, 384 kHz)
- 7.8 Typical Characteristics: Parallel Bridge-Tied (PBTL)
- 7.9 Typical Characteristics: Parallel Bridge-Tied Load (PBTL, 384 kHz)
- 8 Parameter Measurement Information
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Serial Audio Port
- 9.3.2 DC Blocking
- 9.3.3 Volume Control and Gain
- 9.3.4 High-Frequency Pulse-Width Modulator (PWM)
- 9.3.5 EMI Management Features
- 9.3.6 Gate Drive
- 9.3.7 Power FETs
- 9.3.8 Load Diagnostics
- 9.3.9
Protection and Monitoring
- 9.3.9.1 Overcurrent Limit (ILIMIT)
- 9.3.9.2 Overcurrent Shutdown (ISD)
- 9.3.9.3 DC Detect
- 9.3.9.4 Clip Detect
- 9.3.9.5 Global Overtemperature Warning (OTW), Overtemperature Shutdown (OTSD)
- 9.3.9.6 Channel Overtemperature Warning [OTW(i)] and Shutdown [OTSD(i)]
- 9.3.9.7 Undervoltage (UV) and Power-On-Reset (POR)
- 9.3.9.8 Overvoltage (OV) and Load Dump
- 9.3.10 Power Supply
- 9.3.11 Hardware Control Pins
- 9.4 Device Functional Modes
- 9.5 Programming
- 9.6
Register Maps
- 9.6.1 Mode Control Register (address = 0x00) [default = 0x00]
- 9.6.2 Miscellaneous Control 1 Register (address = 0x01) [default = 0x32]
- 9.6.3 Miscellaneous Control 2 Register (address = 0x02) [default = 0x62]
- 9.6.4 SAP Control (Serial Audio-Port Control) Register (address = 0x03) [default = 0x04]
- 9.6.5 Channel State Control Register (address = 0x04) [default = 0x55]
- 9.6.6 Channel 1 Through 4 Volume Control Registers (address = 0x05–0x08) [default = 0xCF]
- 9.6.7 DC Load Diagnostic Control 1 Register (address = 0x09) [default = 0x00]
- 9.6.8 DC Load Diagnostic Control 2 Register (address = 0x0A) [default = 0x11]
- 9.6.9 DC Load Diagnostic Control 3 Register (address = 0x0B) [default = 0x11]
- 9.6.10 DC Load Diagnostic Report 1 Register (address = 0x0C) [default = 0x00]
- 9.6.11 DC Load Diagnostic Report 2 Register (address = 0x0D) [default = 0x00]
- 9.6.12 DC Load Diagnostics Report 3 Line Output Register (address = 0x0E) [default = 0x00]
- 9.6.13 Channel State Reporting Register (address = 0x0F) [default = 0x55]
- 9.6.14 Channel Faults (Overcurrent, DC Detection) Register (address = 0x10) [default = 0x00]
- 9.6.15 Global Faults 1 Register (address = 0x11) [default = 0x00]
- 9.6.16 Global Faults 2 Register (address = 0x12) [default = 0x00]
- 9.6.17 Warnings Register (address = 0x13) [default = 0x20]
- 9.6.18 Pin Control Register (address = 0x14) [default = 0x00]
- 9.6.19 AC Load Diagnostic Control 1 Register (address = 0x15) [default = 0x00]
- 9.6.20 AC Load Diagnostic Control 2 Register (address = 0x16) [default = 0x00]
- 9.6.21 AC Load Diagnostic Impedance Report Ch1 through Ch4 Registers (address = 0x17–0x1A) [default = 0x00]
- 9.6.22 AC Load Diagnostic Phase Report High Register (address = 0x1B) [default = 0x00]
- 9.6.23 AC Load Diagnostic Phase Report Low Register (address = 0x1C) [default = 0x00]
- 9.6.24 AC Load Diagnostic STI Report High Register (address = 0x1D) [default = 0x00]
- 9.6.25 AC Load Diagnostic STI Report Low Register (address = 0x1E) [default = 0x00]
- 9.6.26 Miscellaneous Control 3 Register (address = 0x21) [default = 0x00]
- 9.6.27 Clip Control Register (address = 0x22) [default = 0x01]
- 9.6.28 Clip Window Register (address = 0x23) [default = 0x14]
- 9.6.29 Clip Warning Register (address = 0x24) [default = 0x00]
- 9.6.30 ILIMIT Status Register (address = 0x25) [default = 0x00]
- 9.6.31 Miscellaneous Control 4 Register (address = 0x26) [default = 0x40]
- 9.6.32 Miscellaneous Control 5 Register (address = 0x28) [default = 0x0A]
- 9.6.33 Spread-Spectrum Control 1 Register (address = 0x77) [default = 0x00]
- 9.6.34 Spread Spectrum Control 2 Register (address = 0x78) [default = 0x3F]
- 9.6.35 Spread Spectrum Control 3 Register (address = 0x79) [default = 0x00]
- 10Application and Implementation
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DKQ|56
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DKQ|56
訂購信息
9.3.5.1 Spread-Spectrum
Spread-spectrum modulation is a PWM modulation technique that reduces the peaks seen in EMI measurements by varying the output PWM frequency. The minimum and maximum spread-spectrum frequencies are adjustable using the spread-spectrum registers discuss below.
To enable spread-spectrum follow the procedure below:
- The TAS6424R-Q1 must be correctly powered and in Hi-Z mode.
- While in Hi-Z mode, configure and enable spread-spectrum using I2C.
- The spread-spectrum settings are retained while PVDD and VBAT are applied, but must be enabled again if PVDD or VBAT are removed or invalid.
Figure 9-6 Spread-Spectrum Algorithm
Diagram The spread-spectrum registers are calculated using the relationships below. Note that it's recommended to start with SS_PRE_DIV = 0x1F for most use cases.
- SS_PRE_DIV = (256 * FS / Fcenter) - 2) / 2
- SS_AMP = 64 * (Fcenter - Fmin) / Fcenter
- SS_STEP = 16 * 4 * SS_AMP * FSS / Fcenter
where
- FS - audio sampling frequency
- Fmax - maximum spread-spectrum frequency
- Fmin - minimum spread-spectrum frequency
- Fcenter - spread-spectrum center frequency
- FSS - spread-spectrum triangle waveform frequency
- FPWM_min - minimum PWM output frequency with spread-spectrum enabled
- FPWM_max - maximum PWM output frequency with spread-spectrum enabled
The following sample code enables spread-spectrum for 48 kHz audio sample rate, 32-bit audio depth, TDM-8 and 2.1 MHz.
w D6 28 EA
w D6 77 82 // Enable SS, SS_AMPL = 2
w D6 78 1F // SS_PRE_DIV = 31, Fcenter = 192 kHz
w D6 79 3F // SS_STEP = 63The follow equations calculate the output PWM frequency variation with the settings listed previously.
- Fmin = 256 * FS / ((SS_PRE_DIV * 2 + 2) + SS_AMPL = 256 * 48 kHz / ((31 * 2 + 2) + 2) = 186.18 kHz
- Fmax = 256 * FS / ((SS_PRE_DIV * 2 + 2) + SS_AMPL = 256 * 48 kHz / ((31 * 2 + 2) - 2) = 198.19 kHz
- FPWM_min = Fmin * 11 = 186.18 kHz * 11 = 2.048 MHz
- FPWM_max = Fmax * 11 = 198.19 kHz * 11 = 2.189 MHz