參數(shù)資料
型號(hào)： DS1672
英文描述： Low Voltage Serial Timekeeping Chip
文件頁(yè)數(shù)： 4/13頁(yè)
文件大?。?/td> 104K
代理商： DS1672
DS1672
4 of 13
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 3 volt is applied to V
CC
and a super cap is
connected to V
BACKUP
. Also assume that the trickle charger has been enabled with a diode and resistor R2
between V
CC
and V
BACKUP
. The
maximum current I
max
would therefore be calculated as follows:
I
max
= (3.0V – diode drop) / R2
~ (3.0V – 0.7V) / 2 k
~ 1.2 mA
Obviously, as the super cap changes, the voltage drop between V
CC
and V
BACKUP
will decrease and
therefore the charge current will decrease.
DS1672 PROGRAMMABLE TRICKLE CHARGER
Figure 3
1 OF 16 SELECT
NOTE: ONLY 1010 ENABLES
1 OF 2
SELECT
1 OF 3
SELECT
TCS
BIT 7
TCS
BIT 6
TCS
BIT 5
TCS
BIT 4
DS
DS
RS
RS
BIT 3
BIT 2
BIT 1
BIT 0
100
R3
R1
R2
TRICKLE CHARGE REGISTER
TCS = TRICKLE CHARGER SELECT
DS = DIODE SELECT
RS = RESISTOR SELECT
V
CC
V
BACKUP
2k
4k
相關(guān)PDF資料
PDF描述
DS1672S-2 Low Voltage Serial Timekeeping Chip
DS1672S-3 Low Voltage Serial Timekeeping Chip
DS1672S-33 Low Voltage Serial Timekeeping Chip
DS1682 Total Elapsed Time Recorder with Alarm
DS1682S Total Elapsed Time Recorder with Alarm
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1672_11 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C 32-Bit Binary Counter RTC
DS1672-2 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口: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
DS1672-2+ 功能描述:實(shí)時(shí)時(shí)鐘 I2C 32-Bit Binary Counter RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口: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
DS1672-3 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口: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
DS1672-3+ 功能描述:實(shí)時(shí)時(shí)鐘 I2C 32-Bit Binary Counter RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口: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
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