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參數(shù)資料
| 型號： | MIC5020BM |
| 廠商： | MICREL INC |
| 元件分類： | 功率晶體管 |
| 英文描述： | Replaced by PTN78060W : |
| 中文描述： | BUF OR INV BASED MOSFET DRIVER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 7/7頁 |
| 文件大?。?/td> | 99K |
| 代理商： | MIC5020BM |
MIC5020
Micrel
5-168
October 1998
Faster MOSFET Switching
The MIC5020’s
GATE
current can be multiplied using a pair
of bipolar transistors to permit faster charging and discharg-
ing of the external MOSFET’s gate.
V
DD
Input
Fault
C
T
Gate
Sense
Sense
+
Gnd
150kHz max.
N-Channel
Power MOSFET
(IRF540)
+40V max.
MIC5020
1
2
3
4
8
7
6
5
10μF
L
+11V to +50V
2N3904
2N3906
Figure 4. Faster MOSFET Switching Circuit
NPN and PNP transistors are used to respectively charge
and discharge the MOSFET gate. The MIC5020 gate current
is multiplied by the transistor
β
.
The switched circuit voltage can be increased above 40V by
selecting transistors with higher ratings.
Remote Overcurrent Limiting Reset
In circuit breaker applications where the MIC5020 maintains
an off condition after an overcurrent condition is sensed, the
C
T
pin can be used to reset the MIC5020.
V
DD
Input
Fault
C
T
Gate
Sense
Sense
+
Gnd
TTL input
N-Channel
Power MOSFET
V+
MIC5020
1
2
3
4
8
7
6
5
10μF
L
R
SENSE
+11V to +50V
74HC04
(example)
Q1
2N3904
10k to
100k
Retry (H)
Maintained (L)
Figure 5. Remote Control Circuit
Switching Q1 on pulls C
T
low which keeps the MIC5020
GATE
output off when an overcurrent is sensed. Switching Q1 off
causes C
T
to appear open. The MIC5020 retries in about
20
μ
s and continues to retry until the overcurrent condition is
removed.
For test purposes, a 680
load resistor and 3
sense resistor
will produce an overcurrent condition when the load’s supply
(V+) is approximately 12V or greater.
Low-Temperature Operation
As the temperature of the MIC5020AJB (extended tempera-
ture range version—no longer available) approaches –55
°
C,
the driver’s off-state, gate-output offset from ground in-
creases. If the operating environment of the MIC5020AJB
includes low temperatures (–40
°
C to –55
°
C), add an external
2.2M
resistor as shown in Figures 6a or 6b. This assures
that the driver’s gate-to-source voltage is far below the
external MOSFET’s gate threshold voltage, forcing the
MOSFET fully off.
V
DD
Input
Fault
C
T
Gate
Sense
Sense
Gnd
V+
MIC5020
1
2
3
4
8
7
6
5
10μF
L
R
SENSE
+11V to +50V
2.2M
Figure 6a. Gate-to-Source Pull Down
The gate-to-source configuration (refer to Figure 6a) is ap-
propriate for resistive and inductive loads. This also causes
the smallest decrease in gate output voltage.
V
DD
Input
Fault
C
T
Gate
Sense
Sense
Gnd
V+
MIC5020
1
2
3
4
8
7
6
5
10μF
L
R
SENSE
+11V to +50V
2.2M
Figure 6b. Gate-to-Ground Pull Down
The gate-to-ground configuration (refer to Figure 6b) is
appropriate for resistive, inductive, or capacitive loads. This
configuration will decrease the gate output voltage slightly
more than the circuit shown in Figure 6a.
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|---|---|
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| MIC5021BM | Replaced by PTN78060W : |
| MIC5021BN | Replaced by PTN78060W : |
| MIC5031 | High-Speed High-Side MOSFET Driver(高速高邊MOS場效應管驅動器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5020BM TR | 功能描述:IC DRIVER MOSF LO SIDE HS 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 外部開關 系列:- 標準包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC5020BN | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Current-Sensing Low-Side MOSFET Driver |
| MIC5020YM | 功能描述:功率驅動器IC High Speed Low Side MOSFET Driver - Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC5020YM TR | 功能描述:功率驅動器IC High Speed Low Side MOSFET Driver - Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC5020YM | 制造商:Micrel Inc 功能描述:ICSingle MOSFET DriverSOP8PINPLASTIC |
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