- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98050 > P95020ZNQGI8 (INTEGRATED DEVICE TECHNOLOGY INC) 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 PDF資料下載
參數(shù)資料
| 型號： | P95020ZNQGI8 |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 |
| 封裝： | QFN-132 |
| 文件頁數(shù)： | 64/137頁 |
| 文件大?。?/td> | 3533K |
| 代理商： | P95020ZNQGI8 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁當(dāng)前第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁
P95020 / Preliminary Datasheet
Revision 0.7.10
32
2010 Integrated Device Technology, Inc.
2.12
AUDIO - CLASS-D BTL AMPLIFIER
P95020 implements a digital Class-D 2.5W (4
) BTL amplifier which supports both 8 and 4 loads. Gain for the BTL
amplifier is programmable from -91 dB to +36 dB in 0.5 dB steps using the Volume 0/1 registers. Gain changes and mute
may be applied immediately, on zero crossing or ramped from the current to target value slowly. These settings are
controlled using the Gain Control HI/LO registers.
2.12.1 AUDIO - EQ
There are 5 bands of parametric EQ (bi-quad) per channel. Due to the flexibility of the bi-quad implementation, each filter
band may be configured as a high-pass, low-pass, band-pass, high shelving, low shelving or other function.
Each band has an independent set of coefficients. A bi-quad filter has 6 coefficients. One coefficient is normalized to 1
and 5 are programmed into the core. Each band supports up to +15 dB boost or up to -36 dB cut.
2.12.2 AUDIO - Coefficients
The following equations describe each filter band. The fundamental equation is a bi-quadratic of the form:
2
1
2
1
2
1
0
2
1
0
)
(
z
a
z
a
z
b
z
b
z
H
Rearranging slightly we can see that normalizing a0 or b0 can reduce the number of stored coefficients.
2
1
2
1
0
2
0
1
0
2
0
1
0
)
(
z
a
z
a
z
b
z
b
a
b
z
H
Implementation generally takes the form:
2
0
2
1
0
1
2
0
2
1
0
1
0
n
y
a
n
y
a
n
x
a
b
n
x
a
b
n
x
a
b
n
y
It can be seen that 5 coefficients are needed, and if a0 is set to 1 then only b0, b1, b2, a1, and a2 are needed. To
compensate for the total gain realized from all 5 bands the EQ amplitude is adjusted to prevent saturation. Each channel
has an inverse gain coefficient that is used to compensate for the gain in the EQ bands. So, for 5 bands/channel with 5
coefficients/band + inverse gain/channel, there are a total of 52 values needed.
These values are pre-calculated and programmed into RAM before use. The default values should be benign such as an
all-pass implementation, but it is permissible to implement other transfer functions.
2.12.3 AUDIO - Software Requirements
The EQ must be programmed before enabling (bypass turned off). {Coefficients are random at power-on.}
When changing coefficients, the EQ must be bypassed before programming. Muting the path is not sufficient and may not
prevent issues. Changing coefficients while the filter is in use may cause stability issues, clicks and pops, or other
problems.
All coefficients are calculated by software. Software must verify amplifier stability. Programming incorrect coefficients can
cause oscillation, clipping, or other undesirable effects. After calculating coefficients, software must calculate the inverse
gain (normalize the response) for each channel (Left and Right) to prevent saturation or inadequate output levels. All
values are then either programmed directly into the device or stored in a table for use in a configuration file or firmware.
2.13
AUDIO CLASS_D - REGISTERS
The Audio Class-D Module can be controlled and monitored by writing 8-bit control words to the various Registers.
2.13.1 AUDIO CLASS_D
– RESERVED Registers
These registers are reserved. Do not write to them.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P95020ZLLG | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124 |
| P95020ZLLGI | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124 |
| P95020ZNQGI | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 |
| P95020ZNQG | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 |
| P95020ZLLG8 | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P95021NQG | 功能描述:PMIC 解決方案 Integrates Audio, LED B/Light Pwr Mgt RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| P95021NQG8 | 制造商:Integrated Device Technology Inc 功能描述:POWER MANAGEMENT, AUDIO & CONT 制造商:Integrated Device Technology Inc 功能描述:132-VFQFPN - Tape and Reel 制造商:Integrated Device Technology Inc 功能描述:Integrates Audio, LED B/Light Pwr Mgt |
| P950-36I | 制造商:Tripp Lite 功能描述:SERIAL ATA II SIGNAL CABLE, 2X7-PIN STRAIGHT CONNECTOR - 39" - Bulk |
| P9508- | 制造商:ROEBUCK 功能描述:ROEBUCK DISH WASHING BRUSH |
| P9-511121 | 功能描述:按鈕開關(guān) Flush Dome Solder 5A SPST-DB, SPDT-DB RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 安裝風(fēng)格: 照明: 照明顏色: IP 等級: 端接類型: 觸點(diǎn)電鍍: 執(zhí)行器: 蓋顏色: 封裝: 可燃性等級: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。