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参数资料
| 型号： | DS1672-2 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| 封装： | DIP-8 |
| 文件页数： | 8/13页 |
| 文件大小： | 104K |
| 代理商： | DS1672-2 |
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 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 = (3.0V – diode drop) / R2
~ (3.0V – 0.7V) / 2 k
~ 1.2 mA
Obviously, as the super cap changes, the voltage drop between VCC and VBACKUP 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
DS
RS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
100
R1
R2
TRICKLE CHARGE REGISTER
TCS = TRICKLE CHARGER SELECT
DS = DIODE SELECT
RS = RESISTOR SELECT
VCC
VBACKUP
2k
R3
4k
相关PDF资料 |
PDF描述 |
|---|---|
| DS1672-33 | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| DS1672S-33 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672-3 | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| DS1672U-2 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1672U-33 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1672-2+ | 功能描述:实时时钟 I2C 32-Bit Binary Counter RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1672-3 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1672-3+ | 功能描述:实时时钟 I2C 32-Bit Binary Counter RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS167233 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C 32-Bit Binary Counter RTC |
| DS1672-33 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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