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參數(shù)資料
| 型號： | L6728TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Single phase PWM controller with PowerGOOD |
| 中文描述： | 單相PWM控制器與電源良好 |
| 文件頁數(shù)： | 12/32頁 |
| 文件大小： | 942K |
| 代理商： | L6728TR |
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Over current protection
L6728
12/32
8
Over current protection
The over current function protects the converter from a shorted output or overload, by
sensing the output current information across the Low Side MOSFET drain-source on-
resistance, R
dsON
. This method reduces cost and enhances converter efficiency by avoiding
the use of expensive and space-consuming sense resistors.
The low side R
dsON
current sense is implemented by comparing the voltage at the PHASE
node when LS MOSFET is turned on with the programmed OCP thresholds voltages,
internally held. If the monitored voltage is bigger than these thresholds, an Over Current
Event is detected.
For maximum safety and load protection, L6728 implements a Dual Level Over Current
Protection System:
1
st
level threshold
: it is the user externally set threshold. If the monitored voltage on
PHASE exceeds this threshold, a 1
st
level over current is detected. If four 1
st
level OC
events are detected in four consecutive switching cycles, Over Current Protection will
be triggered.
2
nd
level threshold
: it is an internal threshold whose value is equal to 1
st
level
threshold multiplied by a factor 1.5. If the monitored voltage on PHASE exceeds this
threshold, Over Current Protection will be triggered immediately.
●
●
When Over Current Protection is triggered, the device turns off both LS and HS MOSFETs
in a latched condition.
To recover from over current protection triggered condition, VCC power supply must be
cycled.
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| L6731B | Transistor; Type: Amplifiers/Bipolar; VCEO (V): 25; Ic (A): 1; Pc (W): 0.8; hFE: 85 to 330; VCE (sat) (V) max: 0.5; Package: TO-92Mod |
| L6731BTR | Transistor; Type: Amplifiers/Bipolar; VCEO (V): -25; Ic (A): -1; Pc (W): 0.8; hFE: 85 to 330; VCE (sat) (V) max: -0.5; Package: TO-92Mod |
| L6732 | Adjustable step-down controller with synchronous rectification |
| L6732TR | Adjustable step-down controller with synchronous rectification |
| L6902D013TR | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6730 | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6730_09 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6730B | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6730BTR | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6730C | 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP 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) |
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