Datasheet > AN-1045

AN-1045

更新时间： 2024-10-29 12:34:35

品牌	Logo	应用领域
CYMBET		晶体
页数	文件大小	规格书
3页	214K
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EnerChip CC Backup Power for Micro Crystal RV-2123 RTC

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AN-1045

Application Note

EnerChip™ CC Backup Power for Micro Crystal RV-2123 RTC

Introduction

Cymbet EnerChips are solid state rechargeable batteries having distinguishing characteristics compared to

conventional rechargeable batteries. EnerChips have a high charge/discharge cycle life; low self-discharge;

simple voltage controlled charging; ﬂat discharge voltage proﬁle; have no ﬂammable solvents to leak or catch

ﬁre; are solder reﬂow tolerant; and are offered in low proﬁle surface mount packages.

The EnerChip CC is a surface mount package containing a rechargeable solid state battery - the EnerChip -

with integrated battery management that includes charge control, discharge cutoff circuitry, and a battery

switchover (i.e., supply supervisory) function. EnerChip storage (discharge) capacity varies by product.

EnerChips are used in applications requiring backup, bridging, or transition power to maintain real-time clock

(RTC) operation or SRAM data retention in the event of main power interruption; wireless sensing as the main

power source when energy can be harvested from the ambient power and used to constantly trickle charge the

EnerChip; and as a power source to perform housekeeping for microcontrollers (MCUs) and peripherals when

main power is interrupted, to ensure an orderly shutdown or transition to low power modes.

Many applications demand ultra low power consumption from the various system components, particularly

when system power is derived from primary or rechargeable batteries. Moreover, in systems utilizing RTCs it

is essential that when main power is interrupted, the standby power of the RTC be exceedingly low in order to

achieve maximum run time from the backup power source. A commonly used RTC is the Micro Crystal RV-

2123. Because the device has very low operating current in backup mode - typically 130nA at 3V - a miniature

EnerChip device with integrated power management can provide up to several days of backup power to the RTC

when main power is interrupted. This Application Note describes use of the EnerChip CC - solid state energy

storage integrated with battery management in a single package - as a backup power source for the RV-2123

RTC.

A typical application circuit is shown in Figure 1. Main power is fed to the CBC31xx, which in turn powers the

RV-2123. When the supply voltage drops below a speciﬁc threshold as detected by the CBC31xx, the EnerChip

solid state battery embedded in the EnerChip CC delivers power to the RTC through the CBC31xx VOUT pin.

Figure 1. Typical Application Circuit Using the EnerChip CC and Micro Crystal RV-2123 Real-Time Clock.

Doc AN-72-1045 Rev C

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与AN-1045相关器件

型号	品牌	获取价格	描述	数据表
AN-1046	CYMBET	获取价格	EnerChip CC as Backup Power for a Microchip MCP79410 RTC
AN-1047	CYMBET	获取价格	EnerChip CC Real-Time Clock Backup for K60 Microcontroller
AN-1048	CYMBET	获取价格	EnerChip CC as Backup Power for a DS1340 Real-Time Clock
AN105	VISHAY	获取价格	FETS AS VOLTAGE-CONTROLLED RESISTORS
AN-1050	CYMBET	获取价格	Using the EnerChip Energy Harvesters with the TI LaunchPad
AN-1052	CYMBET	获取价格	Operating the EnerChip in High Temperature Environments
AN-1053	CYMBET	获取价格	Silicon Labs RF-to-USB2 Cymbet EH Demos
AN106	ETC	获取价格	Optoelectronic
AN1062	MOTOROLA	获取价格	Using the QSPI for Analog Data Acquisition
AN1063/D	FREESCALE	获取价格	Product Brief Integrated Processor With DMA

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