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參數(shù)資料
| 型號： | MIC4452 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 12A-Peak Low-Side MOSFET Driver(最大峰值輸出電流12A 低邊MOS場效應(yīng)管驅(qū)動器) |
| 中文描述： | 第12A峰值低側(cè)MOSFET驅(qū)動器（最大峰值輸出電流12A條低邊馬鞍山場效應(yīng)管驅(qū)動器） |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 105K |
| 代理商： | MIC4452 |
5-76
April 1998
MIC4451/4452
Micrel
Applications Information
Supply Bypassing
Charging and discharging large capacitive loads quickly
requires large currents. For example, changing a 10,000pF
load to 18V in 50ns requires 3.6A.
The MIC4451/4452 has double bonding on the supply pins,
the ground pins and output pins. This reduces parasitic lead
inductance. Low inductance enables large currents to be
switched rapidly. It also reduces internal ringing that can
cause voltage breakdown when the driver is operated at or
near the maximum rated voltage.
Internal ringing can also cause output oscillation due to
feedback. This feedback is added to the input signal since it
is referenced to the same ground.
To guarantee low supply impedance over a wide frequency
range, a parallel capacitor combination is recommended for
supply bypassing. Low inductance ceramic disk capacitors
with short lead lengths (< 0.5 inch) should be used. A 1
μ
F low
ESR film capacitor in parallel with two 0.1
μ
F low ESR ceramic
capacitors, (such as AVX RAM GUARD
), provides ad-
equate bypassing. Connect one ceramic capacitor directly
between pins 1 and 4. Connect the second ceramic capacitor
directly between pins 8 and 5.
Grounding
The high current capability of the MIC4451/4452 demands
careful PC board layout for best performance. Since the
MIC4451 is an inverting driver, any ground lead impedance
will appear as negative feedback which can degrade switch-
ing speed. Feedback is especially noticeable with slow-rise
time inputs. The MIC4451 input structure includes 200mV of
hysteresis to ensure clean transitions and freedom from
oscillation, but attention to layout is still recommended.
Figure 5 shows the feedback effect in detail. As the MIC4451
input begins to go positive, the output goes negative and
several amperes of current flow in the ground lead. As little as
0.05
of PC trace resistance can produce hundreds of
millivolts at the MIC4451 ground pins. If the driving logic is
referenced to power ground, the effective logic input level is
reduced and oscillation may result.
To insure optimum performance, separate ground traces
should be provided for the logic and power connections.
Connecting the logic ground directly to the MIC4451 GND
pins will ensure full logic drive to the input and ensure fast
output switching. Both of the MIC4451 GND pins should,
however, still be connected to power ground.
Figure 3. Direct Motor Drive
Figure 4. Self Contained Voltage Doubler
30
29
28
27
26
25
0
50
100
150
200
250
300
350
mA
V
12
LINE
OUTPUT VOLTAGE vs LOAD CURRENT
MIC4451
1μF
50V
MKS 2
UNITED CHEMCON SXE
0.1μF
WIMA
MKS 2
1
8
6, 7
5
4
0.1μF
50V
5.6 k
560
+15
560μF 50V
BYV 10 (x 2)
100μF 50V
(x2) 1N4448
2
+
+
+
DRIVE
LOGIC
φ
1DRIVE SIGNAL
CONDUCTION ANGLE
CONTROL 0° TO 180°
CONDUCTION ANGLE
CONTROL 180° TO 360°
MIC4451
VDD
1μF
VDD
MIC4452
VDD
1μF
VDD
φ
1
M
φ
3
φ
2
PHASE 1 OF 3 PHASE MOTOR
DRIVER USING MIC4451/4452
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC4451 | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 24V; Output Voltage (Vdc): 15V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| MIC4451BM | 12A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process |
| MIC4451BN | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 24V; Output Voltage (Vdc): 24V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| MIC4451CT | 12A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process |
| MIC4452BM | 12A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4452ABM | 功能描述:IC DRIVER MOSFET 12A HS 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4452ABM TR | 功能描述:IC DRIVER MOSFET 12A HS 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4452ABN | 功能描述:IC DRIVER MOSFET 12A HS 8-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4452BM | 功能描述:IC DRIVER MOSF 12A LO SIDE 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4452BM TR | 功能描述:IC DRIVER MOSF 12A LO SIDE 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
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