- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377537 > IRS20954SPBF (International Rectifier) Protected Digital Audio Driver PDF資料下載
參數(shù)資料
| 型號： | IRS20954SPBF |
| 廠商： | International Rectifier |
| 英文描述： | Protected Digital Audio Driver |
| 中文描述： | 受保護的數(shù)字音頻驅(qū)動程序 |
| 文件頁數(shù)： | 17/25頁 |
| 文件大?。?/td> | 585K |
| 代理商： | IRS20954SPBF |
IRS20954S
www.irf.com
17
HO (or LO)
LO (or HO)
tf
Dead-
time
Effective dead-time
10%
10%
90%
Figure 15: Effective Deadtime
A longer dead time period is required for a MOSFET with a larger gate charge value because of the longer t
f
. A shorter
effective deadtime setting is always beneficial to achieve better linearity in the Class D switching stage. However, the likelihood
of shoot-through current increases with narrower deadtime settings in mass production. Negative values of effective deadtime
may cause excessive heat dissipation in the MOSFETs, potentially leading to serious damage. To calculate the optimal
deadtime in a given application, the fall time tf for both output voltages, HO and LO, in the actual circuit needs to be measured.
In addition, the effective deadtime can also vary with temperature and device parameter variations. Therefore, a minimum
effective deadtime of 10 ns is recommended to avoid shoot-through current over the range of operating temperatures and
supply voltages.
Programming Deadtime
DT pin provides a function setting deadtime. The IRS20954 determines its deadtime based on the voltage applied to the DT pin.
An internal comparator translates which pre-determined deadtime is being used by comparing internal reference voltages.
Threshold voltages for each mode are set internally by a resistive voltage divider off V
CC
, negating the need of using a precise
absolute voltage to set the mode. The relationship between the operation mode and the voltage at DT pin is illustrated in the
Fig. 16 below.
Dead-time
.
Vcc
0.57xVcc
0.36xVcc
0.23xVcc
45nS
35nS
25nS
15nS
V
DT
Figure 16: Deadtime Settings vs. V
DT
Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IRS20954STRPBF | Protected Digital Audio Driver |
| IRS20955PBF | PROTECTED DIGITAL AUDIO DRIVER |
| IRS20955SPBF | PROTECTED DIGITAL AUDIO DRIVER |
| IRS2104PBF | HALF-BRIDGE DRIVER |
| IRS2104SPBF | HALF-BRIDGE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRS20954STRPbF | 功能描述:功率驅(qū)動器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS20955PBF | 制造商:International Rectifier 功能描述:MOSFET DRVR 100V 1.2A 2-OUT HI/LO SIDE HALF BRDG INV/NON-INV - Bulk |
| IRS20955SPBF | 功能描述:功率驅(qū)動器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS20955STRPBF | 功能描述:功率驅(qū)動器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS20957SPBF | 功能描述:功率驅(qū)動器IC Prot DIG Audio DRVR 100V 1.0A 500ns RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。