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參數(shù)資料
| 型號： | IRS20954STRPBF |
| 廠商： | International Rectifier |
| 英文描述： | Protected Digital Audio Driver |
| 中文描述： | 受保護(hù)的數(shù)字音頻驅(qū)動程序 |
| 文件頁數(shù)： | 12/25頁 |
| 文件大?。?/td> | 585K |
| 代理商： | IRS20954STRPBF |
IRS20954S
www.irf.com
12
SHUTDOWN
VB
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
NC
NC
VREF
Figure 9: Shutdown Input
Latched Protection
Connecting CSD to V
DD
through a 10 k
or less resistor configures the IRS20954 as a latched over-current protection.
The over-current protection stays in shutdown mode after over-current condition detected. To reset the latch status, an
external reset switch brings CSD pin voltage down below the lower threshold, Vth2. Minimum reset pulse width
required is 200 ns.
VB
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
NC
NC
VREF
<10k
RESET
Figure 10: Latched Protection Configuration
Interfacing with System Controller
The IRS20954 communicates with external system controller by adding simple interfacing circuit shown in Fig. 11. A
generic PNP-BJT U1, such as 2N3906, is to send out SD signal when OCP event happens by capturing sinking
current in CSD pin. Another generic NPN-BJT U2, such as 2N3094, is to reset the internal protection logic by pulling
the CSD voltage below Vth2. Note that the CSD pin is configured as a latched type OCP in this configuration.
VB
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
NC
NC
VREF
<10k
RESET
SD
VSS
U1
U2
Figure 11: Interfacing System Controller
Programming OCP Trip Level
In a Class D audio amplifier, the direction of the load current alternates according to the audio input signal. An over-
current condition can therefore happen during either a positive current cycle or a negative current cycle. The IRS20954
uses R
DS(ON)
in the output MOSFET as current sensing resistors. Due to the high voltage IC structural constraints, high
and low side have different implementations of current sensing. Once measured current gets exceeded pre-
determined threshold, OC output signal is fed to the protection block to shutdown the MOSFET to protect the devices.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IRS20955PBF | PROTECTED DIGITAL AUDIO DRIVER |
| IRS20955SPBF | PROTECTED DIGITAL AUDIO DRIVER |
| IRS2104PBF | HALF-BRIDGE DRIVER |
| IRS2104SPBF | HALF-BRIDGE DRIVER |
| IRS2106 | HIGH AND LOW SIDE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(fēng)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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS20957SPBF | 制造商:International Rectifier 功能描述:IC MOSFET DRIVER HIGH-SPEED SOIC-16 制造商:International Rectifier 功能描述:IC, MOSFET DRIVER, HIGH-SPEED, SOIC-16 |
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