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)： 19/25頁(yè)
文件大小： 585K
代理商： IRS20954S
IRS20954S
www.irf.com
19
IRS20954S
12V
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
VB
-B
Vcc
+B
PWM
VREF
NC
NC
10.4V
Rdd
Figure 18: Supplying V
DD
Charging V
BS
Prior to start
The high side bootstrap power supply can be charged up through a resistor from the positive supply bus to V
B
pin by utilizing an
internal 20.8 V zener diode clamp between V
B
and V
S
. Advantage of this scheme is to eliminate the minimum duration required
for the initial low-side ON.
To determine the requirement for Rcharge, following condition has to be met;
I
I
>
Where I
CHARGE
is a required charging current through Rcharge
I
QBS
is high side quiescent current
Note that Rcharge can drain floating supply charge during on state of high side, which limits maximum PWM modulation index
capability of the system. Rcharge should be large enough not to discharge the floating power supply during the high side ON.
QBS
CHARGE
IRS20954S
12V
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
VB
-B
Vcc
+B
VREF
NC
NC
2
2
I
charge
I
I
Rcharge
Figure 19: Bootstrap Supply Pre-Charging
Start-up Sequence (UVLO)
The protection control block monitors the status of the power supply of V
DD
and V
CC
whether the voltages are above the Under
Voltage Lockout threshold. The LO and HO of the IRS20954 are disabled by shutdown until the UVLO of V
CC
and V
DD
are
released and CSD timer capacitor Ct is charged up. After the UVLO of V
CC
is released, CSD pin resets power-on timer. At the
time the voltage at CSD pin reached the release threshold, Vth1, shutdown logic enables LO and HO. The OC detection blocks
for the low side and high side are disabled until UVLO of V
CC
and V
BS
are released.
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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