Product Detailed Description:

The R5439K series is a lithium battery protection IC co-developed by RICOH and NISSHINBO (Nisshin Spinning), primarily designed for secondary protection of 2 to 4 lithium-ion battery cells, featuring high-precision voltage detection and reduced delay times. Below is a detailed introduction to the functions, applications, and full series models of this range:

The primary features of the R5439K series

1. Dual Protection Feature

• Overcharge, over-discharge, and overcurrent protection for lithium-ion batteries to prevent damage or hazardous conditions due to abnormal states48。
• Supports 2 to 4 battery series applications, suitable for various portable devices, energy storage systems, etc.

1. High-precision voltage detection

• Overcharge detection voltage range: 4.2V (minimum) to 4.6V (maximum), accuracy ±20mV.
• Partial models support adjustable threshold voltage (VR function), suitable for various battery chemistries.

1. Low-power design

• Static Current (ISS) as low as 2.5µA, reducing battery standby consumption4。

1. Optimized Lead Time

• Some models feature the "Delay Time Shortening" function, allowing for quick response to abnormal conditions and enhancing safety.

1. Packaging and Reliability

• Utilizes DFN (PLP) 2020-8 packaging, compact in size, ideal for high-density PCB designs.

The primary applications of the R5439K series

• Consumer ElectronicsSmartphones, tablets, Bluetooth headphones, and other lithium-ion battery protection circuits.
• Electric ToolsPrevent overcharging and over-discharging of the battery pack to extend its service life.
• Energy Storage SystemFor small energy storage devices, such as portable power banks and UPS backup power supplies.
• Industrial EquipmentPortable testing instruments, wireless sensor networks, etc.

R5439K series common models

Summary

The R5439K series is a high-performance lithium battery protection IC, suitable for consumer electronics, power tools, and energy storage systems. Its main features include high-precision voltage detection, low power consumption, and compact packaging. Currently, both NISSHINBO and RICOH offer related models for sale. Some models, such as the R5439K314JB-TR, have been discontinued, and it is recommended to choose alternative models like the R5439K314KA-TR or R5439K324JB-TR.

For detailed technical specifications or purchasing information, please contact the sales team.

R5439K213HA 4.450 4.250 2.500 2.900 4 6 16 － No

R5439K301GA 4.450 4.150 2.500 3.300 2 6 16 － No

R5439K301HA 4.450 4.150 2.500 3.300 4 6 16 － No

R5439K309GA 4.300 4.150 2.500 3.300 2 6 16 － No

R5439K309HA 4.300 4.150 2.500 3.300 4 6 16 － No

R5439K310GA 4.350 4.150 2.500 3.300 2 6 16 － No

R5439K310HA 4.350 4.150 2.500 3.300 4 6 16 － No

R5439K310KA 4.350 4.150 2.500 3.300 1.5 4.5 12 － No

R5439K310JB 4.350 4.150 2.500 3.300 6 6 16 6 Yes

R5439K311GA 4.400 4.150 2.500 3.300 2 6 16 － No

R5439K311HA 4.400 4.150 2.500 3.300 4 6 16 － No

R5439K312GA 4.550 4.150 2.500 3.300 2 6 16 － No

R5439K312HA 4.550 4.150 2.500 3.300 4 6 16 － No

R5439K313JB 4.450 4.250 2.500 3.300 6 6 16 6 Yes

R5439K313KA 4.450 4.250 2.500 3.300 1.5 4.5 12 － No

R5439K314JB 4.500 4.300 2.500 3.300 6 6 16 6 Yes

R5439K314HA 4.500 4.300 2.500 3.300 4 6 16 － No

R5439K314KA 4.500 4.300 2.500 3.300 1.5 4.5 12 － No

R5439K316JB 4.400 4.200 2.500 3.300 6 6 16 6 Yes

R5439K316KA 4.400 4.200 2.500 3.300 1.5 4.5 12 － No

R5439K317JB 4.500 4.200 2.500 3.300 6 6 16 6 Yes

R5439K318KA 4.325 4.150 2.500 3.300 1.5 4.5 12 － No

R5439K319JB 4.550 4.350 2.500 3.300 6 6 16 6 Yes

R5439K320KA 4.500 4.300 2.500 3.100 1.5 4.5 12 － No

R5439K321KA 4.500 4.300 2.500 3.200 1.5 4.5 12 － No

R5439K323JB 4.550 4.250 2.500 3.000 6 6 16 6 Yes

R5439K324JB 4.500 4.200 2.500 3.000 6 6 16 6 Yes

R5439K325JB 4.500 4.300 2.800 3.300 6 6 16 6 Yes

R5439K326JB 4.220 4.150 2.500 3.300 6 6 16 6 Yes

R5439K327JB 4.600 4.300 2.500 3.000 6 6 16 6 Yes

R5439K328JB 4.600 4.300 2.500 3.300 6 6 16 6 Yes

R5439K314JA 4.500 4.300 2.500 3.300 6 6 16 － No

R5439K317JA 4.500 4.200 2.500 3.300 6 6 16 － No

R5439K319JA 4.550 4.350 2.500 3.300 6 6 16 － No

R5439K323JA 4.550 4.250 2.500 3.000 6 6 16 － No

R5439K324JA 4.500 4.200 2.500 3.000 6 6 16 － No

R5439K327JA 4.600 4.300 2.500 3.000 6 6 16 － No

R5439K328JA 4.600 4.300 2.500 3.300 6 6 16 － No

R5439K329JA 4.550 4.250 2.500 3.300 6 6 16 － No

R5439K330JA 4.550 4.250 2.800 3.300 6 6 16 － No

R5439K331JA 4.600 4.300 2.800 3.300 6 6 16 － No

R5439K332JA 4.450 4.150 2.800 3.300 6 6 16 － No

R5439K333JA 4.450 4.150 2.500 3.000 6 6 16 － No

R5439K334JA 4.650 4.350 2.500 3.300 6 6 16 － No

R5439K335JA 4.650 4.350 2.500 3.000 6 6 16 － No