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參數(shù)資料
| 型號(hào)： | MIC4417BM4 |
| 廠商： | MICREL INC |
| 元件分類： | 功率晶體管 |
| 英文描述： | IttyBitty⑩ Low-Side MOSFET Driver |
| 中文描述： | 1.2 A BUF OR INV BASED MOSFET DRIVER, PDSO4 |
| 封裝： | SOT-143, 4 PIN |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 107K |
| 代理商： | MIC4417BM4 |
April 1998
5-29
MIC4416
Functional Diagram
Micrel
5
Functional Description
Refer to the functional diagram.
The MIC4416 is a noninverting driver. A logic high on the CTL
(control) input produces gate drive output. The MIC4417 is
an inverting driver. A logic low on the CTL (control) input
produces gate drive output. The G (gate) output is used to
turn on an external N-channel MOSFET.
Supply
VS (supply) is rated for +4.5V to +18V. External capacitors
are recommended to decouple noise.
Control
CTL (control) is a TTL-compatible input. CTL must be forced
high or low by an external signal. A floating input will cause
unpredictable operation.
A high input turns on Q1, which sinks the output of the 0.3mA
and the 0.6mA current source, forcing the input of the first
inverter low.
Hysteresis
The control threshold voltage, when CTL is rising, is slightly
higher than the control threshold voltage when CTL is falling.
When CTL is low, Q2 is on, which applies the additional
0.6mA current source to Q1. Forcing CTL high turns on Q1
which must sink 0.9mA from the two current sources. The
higher current through Q1 causes a larger drain-to-source
voltage drop across Q1. A slightly higher control voltage is
required to pull the input of the first inverter down to its
threshold.
Logic-Level
Input
VS
CTL
G
MIC4417
INVERTING
MIC4416
NONINVERTING
0.3mA
0.6mA
R1
2k
GND
L
V
SWITCHED
V
SUPPLY
D1
D4
D2
D3
35V
D5
Q1
Q2
Q3
Q4
Functional Diagram with External Components
Q2 turns off after the first inverter output goes high. This
reduces the current through Q1 to 0.3mA. The lower current
reduces the drain-to-source voltage drop across Q1. A
slightly lower control voltage will pull the input of the first
inverter up to its threshold.
Drivers
The second (optional) inverter permits the driver to be manu-
factured in inverting and noninverting versions.
The last inverter functions as a driver for the output MOSFETs
Q3 and Q4.
Gate Output
G (gate) is designed to drive a capacitive load. V
G
(gate
output voltage) is either approximately the supply voltage or
approximately ground, depending on the logic state applied
to CTL.
If CTL is high, and VS (supply) drops to zero, the gate output
will be floating (unpredictable).
ESD Protection
D1 protects VS from negative ESD voltages. D2 and D3
clamp positive and negative ESD voltages applied to CTL.
R1 isolates the gate of Q1 from sudden changes on the CTL
input. D4 and D5 prevent Q1’s gate voltage from exceeding
the supply voltage or going below ground.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC4416 | IttyBitty⑩ Low-Side MOSFET Driver |
| MIC4416BM4 | IttyBitty⑩ Low-Side MOSFET Driver |
| MIC4420BM | 6A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process |
| MIC4420BMM | 6A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process |
| MIC4420BN | 6A-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 |
|---|---|
| MIC4417BM4 TR | 功能描述:IC DRIVER MOSF LOW SIDE SOT143-4 RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動(dòng)器 - 外部開關(guān) 系列:IttyBitty® 標(biāo)準(zhǔn)包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時(shí)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(dòng)）: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 |
| MIC4417BM4TR | 制造商:Micrel Inc 功能描述: |
| MIC4417YM4 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC4417YM4 TR | 功能描述:功率驅(qū)動(dòng)器IC Low Cost Low-Side MOSFET Driver, Non-Inverting - 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(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 |
| MIC4417YM4TR | 制造商:Micrel 功能描述:MOSFET Driver 1.2A 1-Out Lo Side Inv |
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