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參數(shù)資料
| 型號(hào)： | IRS20955PBF |
| 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)： | 10/21頁(yè) |
| 文件大?。?/td> | 524K |
| 代理商： | IRS20955PBF |
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IRS20955
(
S
)
PbF
PRELIMINARY
www.irf.com
10
VDD
`
`
CSD
VSS
S Q
R
COMP1
COMP2
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
UVLO(VB)
OC DET (H)
HV
LEVEL
SHIFT
OC DET (L)
UVLO(VCC)
OC
DEAD TIME
SD
`
PWM
HO
LO
FLOATING HIGH SIDE
FLOATING INPUT
LOW SIDE
Vth2
Vth1
Ct
Figure 7. Shutdown Functional Block Diagram
Protection Control
The internal protection control block dictates the
operational mode-norma, or shutdown, using the
input of the CSD pin. The IC functions as expected
in the normal mode. In shutdown mode, the IC
forces LO and HO to output 0 V with respect to
COM and VS to turn off the power MOSFETs.
The CSD pin provides five functions.
1. Power up delay timer
2. Self-reset timer
3. Shutdown input
4. Latched protection configuration
5. Shutdown status output (host I/F)
Self Reset Protection
By putting a capacitor between CSD and V
SS
, the
IRS20955S can reset itself after entering shutdown
mode.
VB
VDD
IN
CSD
VSS
COM
OCSET
LO
VCC
HO
VS
DT
CSH
NC
NC
VREF
Ct
Figure 8. Self Reset Protection Configuration
Designing Ct
The timing capacitor, Ct, is used to program t
RESET
and t
SU
.
t
RESET,
is the amount of time that elapses
from when the IC enters shutdown mode to
the time when the IC resumes operation.
t
RESET
should be long enough to avoid over
heating the MOSFET from the repetitive
sequence of shutting down and resuming
operation during over current conditions. In
most
of
applications,
recommended time for t
RESET
is 0.1.
t
SU
is the amount of time between powering
up the IC in shutdown mode to the moment
the IC releases shutdown to begin normal
operation.
The values chosen for t
RESET
and t
SU
will determine
the capacitance of Ct using the given equations:
t
Ct
1
I
t
Ct
7
where I
CSD
= the charge/discharge current at the
CSD pin
V
DD
= the supply voltage with respect to V
SS.
the
minimum
DD
CSD
RESET
V
I
=
[F]
DD
CSD
V
SU
=
[F]
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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 |
| IRS20957STRPBF | 功能描述:功率驅(qū)動(dòng)器IC Class D Aud Drvr 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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