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參數(shù)資料
| 型號： | NCP4330DR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | MOSFETs |
| 英文描述： | Post Regulation Driver |
| 中文描述： | BUF OR INV BASED MOSFET DRIVER, PDSO8 |
| 封裝： | LEAD FREE, DSO-8 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 123K |
| 代理商： | NCP4330DR2G |
NCP4330
http://onsemi.com
12
2. LowSide MOSFET Turn Off:
The highside MOSFET turns on about 100 ns after the
lowside one is switched off. During this time when both
switches are off, the body diode of the lowside MOSFET
derives the inductor current (in nominal load condition,
when the coil current is positive, i.e., it flows toward the
output). As a result, the LS MOSFET turns off while its
drainsource voltage keeps around zero due to its body
diode activation.
Again, the energy Qg to be supplied is then approximately
half its value if the drain source voltage was high.
The necessary current capability is then:
Ils
off
1
2*25 nC
25 ns
, that is 500 mA.
High dV/dt occur in the application. When the highside
MOSFET turns on, the drainsource voltage of the lowside
MOSFET sharply increases, producing a huge current
through the Crss capacitor. This current may produce some
parasitic turn on of the LS MOSFET if the driver impedance
is not low enough to absorb this current without significant
increase of the driver voltage. The driver current capability
has then been increased to 750 mA so that it can effectively
face a 30 V variation in 10 ns with a MOSFET exhibiting a
250 pF Crss.
i(l1)
vin1
v(vsn)
irl
ls_drv
4.4990 M
4.4995 M
4.5000 M
Time in Secs
4.5005 M
4.5010 M
Vin
lind
I
Q
V
Q
LS_DRV
40.0
20.0
0
20.0
40.0
l
0
4.00
8.00
12.0
16.0
i
1.50
500 M
2.50
4.50
6.50
i
320
240
160
80.0
0
v
0
20.0
40.0
60.0
80.0
v
Figure 29. LowSide MOSFET Turn Off
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| NCP4330 | 300 W 80 PLUS ATX Reference Design |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| NCP4331 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Synchronous Buck Controller for High Efficiency Post Regulation |
| NCP4331DBR2G | 功能描述:IC REG CTRLR BUCK PWM 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF) |
| NCP4331DR2G | 功能描述:功率驅(qū)動器IC PWM CONTROLLER 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 |
| NCP433FCT2G | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1.5A Ultra-Small Controlled Load Switch with Auto-Discharge Path |
| NCP434 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:2A Ultra-Small Controlled Load Switch with |
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