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參數(shù)資料
| 型號： | UCC3941DTR-3 |
| 英文描述： | Current-Mode SMPS Controller |
| 中文描述： | 電流模式開關(guān)電源控制器 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 156K |
| 代理商： | UCC3941DTR-3 |
UCC1946
UCC2946
UCC3946
SLUS247A - SEPTEMBER 1999
FEATURES
Fully Programmable Reset Threshold
Fully Programmable Reset Period
Fully Programmable Watchdog Period
2% Accurate Reset Threshold
VDD Can Go as Low as 2V
18
μ
A Maximum IDD
Reset Valid Down to 1V
Microprocessor Supervisor with Watchdog Timer
6
7
WDI
WP
8
VDD
3
RES
5
POWER TO
CIRCUITRY
A3
A2
A1
A0
CLK
CLR
8-BIT COUNTER
400nA
WDO
1
GND
EDGE DETECT
WATCHDOG TIMING
100mV
1.235V
2
RTH
4
RP
1.235V
.
400nA
POWER ON RESET
BLOCK DIAGRAM
Note: Pinout represents the 8-pin TSSOP package.
UDG-98001
DESCRIPTION
The UCC3946 is designed to provide accurate microprocessor supervi-
sion, including reset and watchdog functions. During power up, the IC
asserts a reset signal RES with VDD as low as 1V. The reset signal re-
mains asserted until the VDD voltage rises and remains above the re-
set threshold for the reset period. Both reset threshold and reset period
are programmable by the user. The IC is also resistant to glitches on
the VDD line. Once RES has been deasserted, any drops below the
threshold voltage need to be of certain time duration and voltage mag-
nitude to generate a reset signal. These values are shown in Figure 1.
An I/O line of the microprocessor may be tied to the watchdog input
(WDI) for watchdog functions. If the I/O line is not toggled within a set
watchdog period, programmable by the user, WDO will be asserted.
The watchdog function will be disabled during reset conditions.
The UCC3946 is available in 8-pin SOIC(D), 8-pin DIP (N or J) and
8-pin TSSOP(PW) packages to optimize board space.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3941N-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| UCC3941N-ADJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| UCC39421EVM003 | 功能描述:EVALUATION MODULE FOR UCC39421 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:- 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(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| UCC39421N | 功能描述:DC/DC 開關(guān)控制器 Hi Freq Multimode Synch Cntrlr 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 安裝風格: 封裝 / 箱體:CPAK |
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