R5436T502BA-E2

Product Overview

R5436T502BA-E2 is a Nisshinbo Micro Devices multi-cell lithium-ion battery protection IC designed for 3- to 5-series Li-ion and Li-polymer battery packs. The device monitors individual cell voltages and pack current conditions to provide overcharge, overdischarge, discharge overcurrent, charge overcurrent and short-circuit protection. With integrated cell-balancing control, selectable open-wire detection, zero-volt charging support and a compact TSSOP-28 package, it is well suited for power tools, electric bicycles and other rechargeable battery systems.

Key Features

• Manufacturer: Nisshinbo Micro Devices Inc. (formerly Ricoh Electronic Devices)

• Part Number: R5436T502BA-E2

• Product Type: Li-Ion / Li-Polymer Battery Protection IC

• Series: R5436T

• Supported Battery Configuration: 3 to 5 Series Cells

• Operating Input Voltage: 2.5V to 25V

• Absolute Maximum Supply Voltage: 30V

• Supply Current: 12μA Typical

• Standby Current: 6μA Typical

• Overcharge Detection Voltage: 4.250V

• Overcharge Release Voltage: 4.100V

• Overcharge Detection Accuracy: ±25mV

• Overcharge Detection Delay Time: 1.0s Typical

• Overdischarge Detection Voltage: 2.500V

• Overdischarge Release Voltage: 3.000V

• Cell-Balancing Detection Voltage: 4.200V

• Cell-Balancing Release Voltage: 4.190V

• Discharge Overcurrent Detection Voltage 1: 0.100V

• Discharge Overcurrent Detection Voltage 2: 0.300V

• Short-Circuit Detection Voltage: 0.420V

• Charge Overcurrent Detection Voltage: -0.050V

• Charge Overcurrent Detection Delay Time: 8ms

• Short-Circuit Detection Delay Time: Approximately 330μs

• Zero-Volt Charging: Supported

• Additional Functions: Cell balancing, delay-time shortening, external NTC temperature protection and selectable open-wire detection

• Package Type: TSSOP-28

• Mounting Type: Surface Mount Technology (SMT)

• Operating Temperature Range: -40°C to +85°C

• Packaging: Tape and Reel

Applications

R5436T502BA-E2 is designed for rechargeable battery packs requiring accurate multi-cell monitoring and comprehensive protection functions. Typical applications include cordless power tools, electric bicycles, portable industrial equipment, rechargeable energy storage systems and other products using 3- to 5-series Li-ion or Li-polymer battery packs.

Design & Selection Considerations

R5436T502BA-E2 provides dedicated protection thresholds for the 502 configuration, including 4.250V overcharge detection, 2.500V overdischarge detection and integrated cell-balancing control. Overdischarge and discharge-overcurrent delay times can be adjusted using external capacitors, allowing the protection response to be matched to the battery pack and load characteristics. Designers should verify the exact cell count, external MOSFET configuration, current-sense resistance, NTC circuitry and delay capacitor values before production use.

Quality & Sourcing

Antrex Electronics can support R5436T502BA-E2 sourcing with stock availability checks, RFQ quotation, package confirmation, date code review and shipment arrangement. For project-based purchasing, customers can provide quantity requirements, delivery schedules, battery configuration and application details for faster quotation support.

For quality assurance, Antrex Electronics can assist with product photos, marking verification, visual inspection and third-party testing services when required. Battery pack manufacturers, power tool suppliers, electric mobility companies, industrial equipment manufacturers and electronic component buyers are welcome to submit BOM lists or hard-to-find battery management IC requirements for sourcing assistance.