參數(shù)資料
型號(hào)： L6730
廠商： 意法半導(dǎo)體
英文描述： Adjustable step-down controller with synchronous rectification
中文描述： 可調(diào)式降壓同步整流控制器
文件頁(yè)數(shù)： 26/52頁(yè)
文件大?。?/td> 1370K
代理商： L6730
Device description
L6730 - L6730B
26/52
If the current is higher than the valley OCP threshold during the off-time, the high-side
MOSFET(s) will not be turned ON. In this way the maximum current can be limited (
Figure 21.
).
During the constant-current-protection if the Vout becomes lower than 80% of the programmed
value an UV (under-voltage) is detected and the device enters in HICCUP mode. The under-
voltage-lock-out (UVLO) is adjustable by the multifunction pin (see
Chapter 5.10 on page 27
).
It’s possible to set two different thresholds:
4.2V for 5V Bus
8.6V for 12V Bus
●
●
Working with a 12V BUS, setting the UVLO at 8.6V can be very helpful to limit the input current
in case of BUS fall.
5.9
Adjustable masking time
By connecting the masking time pin to V
CCDR
or GND it is possible to select two different values
for the peak current protection leading edge blanking time. This is useful to avoid any false OCP
trigger due to spikes and oscillations generated at the turn-on of the high-side MOSFET(s). The
amount of this noise depends very much on the layout, MOSFETs, free-wheeling diode,
switched current, and input voltage.
When good layout and medium current are used, the minimum masking time can be chosen,
while in case of higher noise, it is better to select the maximum masking time. By connecting
the t
MASK
pin to V
CCDR
the masking time is about 400ns, while connecting it to GND results in
about 260ns masking time.
Figure 21. Valley OCP (L6730B).
V
OUT
I
L
T
OFF
T
OFF
Valley th
相關(guān)PDF資料
PDF描述
L6730B Adjustable step-down controller with synchronous rectification
L6730BTR Adjustable step-down controller with synchronous rectification
L6730TR Adjustable step-down controller with synchronous rectification
L6740L Hybrid controller (4+1) for AMD SVID and PVID processors
L6740LTR Hybrid controller (4+1) for AMD SVID and PVID processors
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 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(yè)面:1316 (CN2011-ZH PDF)
L6730CQ 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
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