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參數(shù)資料
| 型號(hào)： | IXDD404SI-16 |
| 廠商： | IXYS CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | 4 Amp Dual Low-Side Ultrafast MOSFET Driver |
| 中文描述： | 4 A 2 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDSO16 |
| 封裝： | MS-013AA, SOIC-16 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 666K |
| 代理商： | IXDD404SI-16 |
8
PRELIMINARY DATA SHEET
IXDD404PI/404SI/404SIA/404SI-16
APPLICATIONS INFORMATION
Short Circuit di/dt Limit
A short circuit in a high-power MOSFET such as the IXFN100N20,
(20A, 1000V), as shown in Figure 26, can cause the current
through the module to flow in excess of 60A for 10
μ
s or more
prior to self-destruction due to thermal runaway. For this
reason, some protection circuitry is needed to turn off the
MOSFET module. However, if the module is switched off too
fast, there is a danger of voltage transients occuring on the
drain due to Ldi/dt, (where L represents total inductance in
series with drain). If these voltage transients exceed the
MOSFET's voltage rating, this can cause an avalanche break-
down.
The IXDD404 has the unique capability to softly switch off the
high-power MOSFET module, significantly reducing these
Ldi/dt transients.
Thus, the IXDD404 helps to prevent device destruction from
both
dangers; over-current, and avalanche breakdown due to
di/dt induced over-voltage transients.
The IXDD404 is designed to not only provide
±
4A per output
under normal conditions, but also to allow it's outputs to go into
a high impedance state. This permits the IXDD404 output to
control a separate weak pull-down circuit during detected
overcurrent shutdown conditions to limit and separately con-
trol d
VGS
/dt gate turnoff. This circuit is shown in Figure 27.
Referring to Figure 27, the protection circuitry should include
a comparator, whose positive input is connected to the source
of the IXFD100N20. A low pass filter should be added to the
input of the comparator to eliminate any glitches in voltage
caused by the inductance of the wire connecting the source
resistor to ground. (Those glitches might cause false triggering
of the comparator).
The comparator's output should be connected to a SRFF(Set
Reset Flip Flop). The flip-flop controls both the Enable signal,
and the low power MOSFET gate. Please note that CMOS 4000-
series devices operate with a V
range from 3 to 15 VDC, (with
18 VDC being the maximum allowable limit).
A low power MOSFET, such as the 2N7000, in series with a
resistor, will enable the IXFN100N20 gate voltage to drop
gradually. The resistor should be chosen so that the RC time
constant will be 100us, where "C" is the Miller capacitance of
the IXFN100N20.
For resuming normal operation, a Reset signal is needed at
the SRFF's input to enable the IXDD404 again. This Reset can
be generated by connecting a One Shot circuit between the
IXDD408 Input signal and the SRFF restart input. The One Shot
will create a pulse on the rise of the IXDD404 input, and this
pulse will reset the SRFF outputs to normal operation.
When a short circuit occurs, the voltage drop across the low-
value, current-sensing resistor, (Rs=0.005 Ohm), connected
between the MOSFET Source and ground, increases. This
triggers the comparator at a preset level. The SRFF drives a low
input into the Enable pin disabling the IXDD404 output. The
SRFF also turns on the low power MOSFET, (2N7000).
In this way, the high-power MOSFET module is softly turned off
by the IXDD404, preventing its destruction.
10uH
Ld
0.1ohm
Rd
Rs
20nH
Ls
1ohm
Rg
10kohm
R+
IXFN100N20
High_Power
5kohm
Rcomp
100pF
C+
+
-
V+
V-
Comp
LM339
1600ohm
Rsh
Ccomp
1pF
VCC
IN
EN
DGND
OUT
IXDD404
+
-
VIN
+
-
VCC
+
-
REF
+
-
VB
CNOR2
1Mohm
Ros
CNOT2
CD4011A
NAND
CD4049A
NOT1
CNOR1
CD4049A
NOT3
Low_Power
2N7002/PLP
1pF
0
S
R
EN
Q
One Shot Circuit
SR Flip-Flop
Figure 27 - Application Test Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IXDD404SIA | 4 Amp Dual Low-Side Ultrafast MOSFET Driver |
| IXDD408CI | 8 Amp Low-Side Ultrafast MOSFET Driver |
| IXDD408PI | 8 Amp Low-Side Ultrafast MOSFET Driver |
| IXDD408SI | 8 Amp Low-Side Ultrafast MOSFET Driver |
| IXDD408YI | 8 Amp Low-Side Ultrafast MOSFET Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IXDD404SIA | 功能描述:功率驅(qū)動(dòng)器IC 4 Amps 40V 2.5 Rds 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 |
| IXDD404SIA-16 | 功能描述:功率驅(qū)動(dòng)器IC 4 Amps 40V 2.5 Rds 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 |
| IXDD408CI | 功能描述:功率驅(qū)動(dòng)器IC 40V 8A 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 |
| IXDD408PI | 功能描述:功率驅(qū)動(dòng)器IC 40V 8A 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 |
| IXDD408SI | 功能描述:功率驅(qū)動(dòng)器IC 40V 8A 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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