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參數(shù)資料
| 型號(hào)： | DS1672U-33+T&R |
| 廠(chǎng)商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 2/15頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TIMEKEEPER 3.3V 32-BIT 8-USOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 類(lèi)型： | 二進(jìn)制計(jì)數(shù)器 |
| 特點(diǎn)： | 涓流充電器 |
| 時(shí)間格式： | 二進(jìn)制 |
| 數(shù)據(jù)格式： | 二進(jìn)制 |
| 接口： | I²C，2 線(xiàn)串口 |
| 電源電壓： | 2.97 V ~ 3.63 V |
| 電壓 - 電源，電池： | 1.3 V ~ 3.63 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
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DS1672
10 of 15
Trickle Charger
The trickle charger is controlled by the trickle charge register. The simplified schematic of Figure 5
shows the basic components of the trickle charger. The trickle charge select (TCS) bit (bits 4–7) controls
the selection of the trickle charger. In order to prevent accidental enabling, only a pattern on 1010 will
enable the trickle charger. All other patterns will disable the trickle charger. The DS1672 powers up with
the trickle charger disabled. The diode select (DS) bits (bits 2, 3) select whether or not a diode is
connected between VCC and VBACKUP. If DS is 01, no diode is selected or if DS is 10, a diode is selected.
The RS bits (bits 0, 1) select whether a resistor is connected between VCC and VBACKUP and what the value
of the resistor is. The resistor selected by the resistor select (RS) bits and the diode selected by the diode
select (DS) bits are as follows:
TCS
DS
RS
FUNCTION
X
0
X
Disabled
X
1
X
Disabled
X
0
Disabled
1
0
1
0
1
0
1
No diode, 250
resistor
1
0
1
0
1
0
1
One diode, 250
resistor
1
0
1
0
1
0
No diode, 2k
resistor
1
0
1
0
1
0
1
0
One diode, 2k
resistor
1
0
1
0
1
No diode, 4k
resistor
1
0
1
0
1
0
1
One diode, 4k
resistor
0
Initial default value--disabled
Warning: The resistor value of 250
must not be selected whenever V
CC is greater
than 3.63V.
Diode and resistor selection is determined by the user according to the maximum current desired for
battery or super cap charging. The maximum charging current can be calculated as illustrated in the
following example. Assume that a system power supply of 3V is applied to VCC and a super cap is
connected to VBACKUP. Also assume that the trickle charger has been enabled with a diode and resistor R2
between VCC and VBACKUP. The maximum current IMAX would, therefore, be calculated as follows:
IMAX = (5.0V - diode drop) / R1 ≈ (5.0V - 0.6V) / 2k ≈ 2.2mA
As the super cap changes, the voltage drop between VCC and VBACKUP will decrease and, therefore, the
charge current will decrease.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1673 | 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:Portable System Controller |
| DS1673-3 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Portable System Controller |
| DS1673-5 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Portable System Controller |
| DS1673E-3 | 功能描述:實(shí)時(shí)時(shí)鐘 Portable System Controller RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1673E-3/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC CTRLR SYSTEM PORT 3V 20-TSSOP |
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