參數(shù)資料
型號： 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)動程序
文件頁數(shù)： 21/25頁
文件大?。?/td> 585K
代理商： IRS20954S
IRS20954S
www.irf.com
21
Junction Temperature Estimation
The power dissipation in the IRS20954 consists of following dominant items;
-
P
MID
: dissipation in floating input logic and protection
-
P
LOW
: dissipation in low side
-
P
HIGH
: dissipation in high side
1. P
MID
: Dissipation in Floating Input Section
The dissipation in floating input section is given by;
P
P
P
+
=
DD
DD
DD
BUS
LDD
ZDD
MID
V
R
V
V
≈
+
Where
P
ZDD
is dissipation from internal zener diode clamping V
DD
voltage.
P
LDD
is dissipation from internal logic circuitry.
V
+BUS
is positive bus voltage feeding V
DD
from.
R
DD
is a resistor feeding V
DD
from V
+BUS
.
For obtaining a value of R
DD
, refer to Supplying V
DD
section above.
2. P
LOW
: Dissipation in Low Side
The dissipation in low side includes loss from logic circuitry and loss from driving LO, and is given by;
+
=
LO
LDD
LOW
P
P
P
(
)
+
+
+
=
(int)
g
g
O
O
SW
g
CC
QCC
R
R
R
R
f
Q
Vcc
V
I
Where
P
LDD
is dissipation from internal logic circuitry.
P
LO
is dissipation from gate drive stage to LO.
R
O
is equivalent output impedance of LO, typically 10
for the IRS20954.
R
g(int)
is internal gate resistance of MOSFET.
R
g
is external gate resistance.
Qg is total gate charge of low side MOSFET.
3. P
HIGH
: Dissipation in High Side
The dissipation in high side includes loss from logic circuitry and loss from driving LO and is given by;
+
=
HO
LDD
HIGH
P
P
P
(
)
+
+
+
=
(int)
g
g
O
O
SW
g
BS
BS
QBS
R
R
R
R
f
Q
V
V
I
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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