參數(shù)資料
型號: LP3907SQ-JIXI
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24
封裝: 4 X 4 MM, 0.8 MM HEIGHT, LLP-24
文件頁數(shù): 17/44頁
文件大?。?/td> 3058K
代理商: LP3907SQ-JIXI
Faults Occurring in Counter Delay After Startup
30017881
The above timing diagram details the Power good with delay
with respect to the enable signals EN1, and EN2. The RDY1,
RDY2 are internal signals derived from the output of two com-
parators. Each comparator has been trimmed as follows:
Comparator Level
Buck Supply Level
HIGH
Greater than 94%
LOW
Less than 85%
The circuits for EN1 and RDY1 is symmetrical to EN2 and
RDY2, so each reference to EN1 and RDY1 will also work for
EN2 and RDY2 and vice versa.
If EN1 and RDY1 signals are High at time t1, then the RDY1
signal rising edge triggers the programmable delay counter
(50
μs, 50ms, 100ms, 200ms). This delay forces nPOR LOW
between time interval t1 and t2. nPOR is then pulled high after
the programmable delay is completed. Now if EN2 and RDY2
are initiated during this interval the nPOR signal ignores this
event.
If either RDY1or RDY2 were to go LOW at t3 then the pro-
grammable delay is triggered again.
www.national.com
24
LP3907
相關PDF資料
PDF描述
LP3918TL-I 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25
LP3923TLX 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TLX-VB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TL-VB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TLX-VC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
相關代理商/技術參數(shù)
參數(shù)描述
LP3907SQ-JXQX 制造商:Texas Instruments 功能描述:
LP3907SQ-JXQX/NOPB 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LP3907SQ-JXQX/S7001874 制造商:Texas Instruments 功能描述:NSCLP3907SQ-JXQX@S7001874 1A&0.6A BUCKS
LP3907SQ-JXQXEV 功能描述:LP3907 EVALUATION BOARD RoHS:否 類別:編程器,開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC(離線)SMPS 系列:PowerWise® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC,步升 輸出及類型:1,非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LP3907SQ-JXQXEV/NOPB 功能描述:BOARD EVAL FOR LP3907 RoHS:是 類別:編程器,開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC(離線)SMPS 系列:PowerWise® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC,步升 輸出及類型:1,非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969