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Former Member over 13 years ago

Hi Mr. Setsuda.
I'm evaluating EECRF0H104 Gold CAP. I want to charge this CAP with a battery (4.2V).
1) On panasonic application note I read: no need of any external resistor because all internal capacitances have to charge and there is many internal resistances, one for any capacitance element. But at the first time, with cap completely discharged, what is the current taken from battery (I suppose to connect CAP in parallel way to battery )? Is there a particular note to connect it to battery?

2) Now I suppose CAP completely charged and my battery is very low and I suppose a pulse current with very low intensity (150 uA every second). Is EECRF0H104 choice correct? Is Gold cap lifetime destroyed by such current pulsing load?

Thank you very much.

Thanks a lot
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Former Member over 13 years ago in reply to Former Member

Hello Giamby 3000 san

Thank you for your inquiry.

It seems that Coin tyoe Gold cap may not suitable for your puls requirment.

Anyway

Please fill your requirment into attached Gold Cap Check sheet.

Then I will check.

Gold Cap Requirement Checklist
		Example
Application		RF-recieve Data buffer
Charging Conditions	Charging Voltage	3,6V or 5,0V
	Charging Time (Max. / Min.)	3600s
	Charging Current (Balanced Resistor, if any)	200Ohm if 3,6V / 7mA if 5,0V suppply
Discharging Conditions	Backup Current (Max. / Min. / Typical)	Typical 32mA
	Cut-off Voltage	3,0V-2,7V exxact Value unknown at this time
	Required Backup Time	120ms
	Backup for what (RTC, SRAM, …)	receive current for RF transceiver
Operating Conditions	Expected lifetime	50000h/100000h/140000h
Operating Conditions	Ambient Temperature (Max. / Min. / Typical)	min. 5°C / max 55°C / typical 35°C

Thanks
Setsuda

Former Member over 13 years ago in reply to Former Member

Gold Cap Requirement Checklist
		My application
Application		GSM / GPRS Datalogger
Charging Conditions	Charging Voltage	3,6V
	Charging Time (Max. / Min.)	3600s
	Charging Current (Balanced Resistor, if any)	?
Discharging Conditions	Backup Current (Max. / Min. / Typical)	20 mA for 10 minutes
	Cut-off Voltage	2,5V
	Required Backup Time
	Backup for what (RTC, SRAM, …)	GSM Pulse Current 0 µA continuous current; 2000 mA for 577 µs every 4.6 ms
Operating Conditions	Expected lifetime	140000h
Operating Conditions	Ambient Temperature (Max. / Min. / Typical)	min. -20°C / max 60°C / typical 30°C

Thank you very much Mr. Hiroshi

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Former Member over 13 years ago in reply to Former Member

Gold Cap Requirement Checklist
		My application
Application		GSM / GPRS Datalogger
Charging Conditions	Charging Voltage	3,6V
	Charging Time (Max. / Min.)	3600s
	Charging Current (Balanced Resistor, if any)	?
Discharging Conditions	Backup Current (Max. / Min. / Typical)	20 mA for 10 minutes
	Cut-off Voltage	2,5V
	Required Backup Time
	Backup for what (RTC, SRAM, …)	GSM Pulse Current 0 µA continuous current; 2000 mA for 577 µs every 4.6 ms
Operating Conditions	Expected lifetime	140000h
Operating Conditions	Ambient Temperature (Max. / Min. / Typical)	min. -20°C / max 60°C / typical 30°C

Thank you very much Mr. Hiroshi

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