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參數(shù)資料
| 型號： | MIC4429CN |
| 廠商： | MICREL INC |
| 元件分類： | 功率晶體管 |
| 英文描述： | 100000 SYSTEM GATE 1.8 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | 6 A BUF OR INV BASED MOSFET DRIVER, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 96K |
| 代理商： | MIC4429CN |
5-38
April 1998
MIC4420/4429
Micrel
Applications Information
Supply Bypassing
Charging and discharging large capacitive loads quickly
requires large currents. For example, charging a 2500pF
load to 18V in 25ns requires a 1.8 A current from the device
power supply.
The MIC4420/4429 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
), pro-
vides adequate 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 MIC4420/4429 demands
careful PC board layout for best performance Since the
MIC4429 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 MIC4429 input structure includes 300mV
of hysteresis to ensure clean transitions and freedom from
oscillation, but attention to layout is still recommended.
Figure 3 shows the feedback effect in detail. As the MIC4429
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 MIC4429 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 MIC4429 GND
pins will ensure full logic drive to the input and ensure fast
output switching. Both of the MIC4429 GND pins should,
however, still be connected to power ground.
Figure 3. Self-Contained Voltage Doubler
30
29
28
27
26
25
0
20
40
60
80
100
120
140
mA
V
30
LINE
OUTPUT VOLTAGE vs LOAD CURRENT
MIC4429
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
220 μF 50V
BYV 10 (x 2)
35 μF 50V
(x2) 1N4448
2
+
+
+
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4429CT | 功能描述:IC DRIVER MOSFET 6A LS TO-220-5 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 |
| MIC4429YM | 功能描述:功率驅(qū)動器IC 6A Hi-Speed, Hi-Current Single 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC4429YM TR | 功能描述:功率驅(qū)動器IC 6A Hi-Speed, Hi-Current Single 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC4429YMM | 功能描述:功率驅(qū)動器IC 6A Hi-Speed, Hi-Current Single 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC4429YMM TR | 功能描述:功率驅(qū)動器IC 6A Hi-Speed, Hi-Current Single 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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