參數(shù)資料
型號(hào)： IRS20954S
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(yè)數(shù)： 14/25頁(yè)
文件大?。?/td> 585K
代理商： IRS20954S
IRS20954S
www.irf.com
14
Since the sensed voltage of V
S
is compared with the voltages fed to the OCSET
pin, the required voltage of OCSET with
respect to COM for a trip level I
TRIP+
is:
V
OCSET
= V
DS(LOW SIDE)
= I
TRIP+
x R
DS(ON)
In order to neglect the input bias current of OCSET pin, it is recommended to use 10 k
total for R4 and R5 to drain 0.5 mA
through the resistors.
High Side Over-Current Sensing
For the positive load current, high side over-current sensing monitors over load condition by measuring V
DS
with CSH and Vs
pins and shutdown the operation. The CSH pin is to detect the drain-to-source voltage refers to the V
S
pin which is the source
of the high side MOSFET. In order to neglect overshoot ringing at the switching edges, CSH sensing circuitry starts monitoring
after the first 300 ns the HO is on by blanking the signal from CSH pin.
In contrast to the low side current sensing, the threshold of CSH pin to engage OC protection is internally fixed at 1.2 V. An
external resistive divider R2 and R3 can be used to program a higher threshold.
An external reverse blocking diode, D1, is to block high voltage feeding into the CSH pin while high side is off.
By subtracting a
forward voltage drop of 0.6 V at D1, the minimum threshold which can be set in the high side is 0.6 V across the drain to
source.
With the configuration in Fig. 14, the voltage in CSH is:
(
)
(
)
(
3
2
R
R
+
Where:
V
DS(HIGH SIDE)
is drain to source voltage of the high side MOSFET in its ON state
VF
(D1)
is the forward drop voltage of D1
Since V
DS(HIGH SIDE)
is determined by the product of drain current I
D
and R
DS(ON)
in the high side MOSFET. V
CSH
can be written
as:
(
)
(
)
(
3
2
R
R
+
2
=
OCH
Vth
R
The reverse blocking diode D1 is forward biased by a 10 k
resistor R1 when the high side MOSFET is on.
)
3
D
F
HIGHSIDE
DS
CSH
V
V
R
V
+
=
)
3
D
F
D
ON
DS
CSH
V
I
R
R
V
+
=
1
3
+
F
DS
V
V
R
相關(guān)PDF資料
PDF描述
IRS20954SPBF Protected Digital Audio Driver
IRS20954STRPBF Protected Digital Audio Driver
IRS20955PBF PROTECTED DIGITAL AUDIO DRIVER
IRS20955SPBF PROTECTED DIGITAL AUDIO DRIVER
IRS2104PBF HALF-BRIDGE DRIVER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IRS20954SPbF 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
IRS20954STRPbF 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
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
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