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參數(shù)資料
| 型號(hào)： | 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(dòng)程序 |
| 文件頁數(shù)： | 15/25頁 |
| 文件大?。?/td> | 585K |
| 代理商： | IRS20954STRPBF |
IRS20954S
www.irf.com
15
\
VS
OC
+
-
IRS20954
CSH
Comparator
-B
+B
OUT
Q1
Q2
HO
LO
HO
R1
R2
R3
D1
VB
CSH
Vcc
1.2V
Figure 14: Programming High Side Over-Current Threshold
OCP Design Example
High Side Over-current Setting
Fig. 14 demonstrates the typical peripheral circuit of high side current sensing. For example, the over-current protection level is
set to trip at 30 A with a MOSFET with R
DS(ON)
of 100 m
, the component values of R2 and R3 are calculated as:
Choose R2+R3=10 k
, thus
2
3
10
R
k
R
=
.
Vth
k
R
+
Vth
OCL
= 1.2 V
V
F
= 0.6 V
V
DS@ID=30A
= 100 m
x 30 A = 3 V
V
DS
is the voltage drop at I
D
=30 A across R
DS(ON)
of the high side MOSFET. V
F
is a forward voltage of reverse blocking diode,
D1. T
he values of R2 and R3 from the E-12 series are:
R2 = 6.8 k
R3 = 3.3 k
Choosing the Right Reverse Blocking Diode
The reverse blocking diode D1 is determined by voltage rating and speed. To block bus voltage, reverse voltage has to be
higher than (+B)-(-B). Also the reverse recovery time needs to be as fast as the bootstrap charging diode. The Philips BAV21W,
200 V, 50 ns high speed switching diode, is more than sufficient.
F
DS
OCH
V
V
=
10
3
相關(guān)PDF資料 |
PDF描述 |
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| 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(dòng)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(shí)間: 下降時(shí)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(dòng)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(shí)間: 下降時(shí)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(dòng)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(shí)間: 下降時(shí)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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