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R5436 Series

3-Cell to 5-Cell Li-ion Battery Protection IC with Thermal Protection

  • RoHS

The R5436 is an overcharge, overdischarge and overcurrent protection IC for Li-ion or Li-polymer secondary battery. Overcharge, Overdischarge, Charge Overcurrent and Discharge Overcurrent for 3 to 5 serial cells can be detected. By cascade connection using the R5436, it is also possible to protect 6-serial or more cells rechargeable battery pack. The R5436 provides a cell-balancing function to equalize imbalance between cells, and it provides an open-wire detection to detect a broken wire between a battery and the circuit board. The open-wire detection is optionally selectable.

Specs & Datasheets

Operating Input Voltage 2.5 V to 25 V (Maximum Rating: 30 V)
Charger Negative Input Voltage 30 V (Maximum Rating)
Number of Cells 3,4,5
Supply Current Typ. 12.0 µA
Standby Current Typ. 6.0 µA
Overcharge Detection Voltage 3.6 V to 4.5 V (0.005 V Steps)
Overcharge Detection Voltage Accuracy ±25 mV
Overcharge Detection Delay Time 1.0 s
Overcharge Restoration Voltage VDET1 -0.1 V to VDET1 -0.4 V (0.01 V Steps)
Overdischarge Detection Voltage 2.0 V to 3.2 V (0.005 V Steps)
Overdischarge Detection Voltage Accuracy ±2.5%
Overdischarge Detection Delay Time Adjustable with an external capacitor
Discharge Overcurrent Detection Voltage VDET31: 0.05 V to 0.25 V (0.01 V Steps)
VDET32: VDET31 x 3
Discharge Overcurrent Detection Voltage Accuracy VDET31: ±20 mV (Standard spec), ±15 mV (VDET31 ≤ 0.15V) / ±20 mV (VDET31 > 0.15V) (High standard spec)
VDET32: ±50 mV (Standard spec), ±25 mV (VDET31 ≤ 0.10V) / ±50 mV (VDET31 > 0.10V) (High standard spec)
Discharge Overcurrent Detection Delay Time Adjustable with an external capacitor
Charge Overcurrent Detection Voltage -0.2 V, -0.1 V, -0.05 V
Charge Overcurrent Detection Voltage Accuracy ±30 mV (Standard spec), ±15 mV (VDET4= -0.05V / -0.1V) / ±30 mV (VDET4 = -0.2V) (High standard spec)
Charge Overcurrent Detection Delay Time 8 ms
Short Detection Voltage 0.25 V to 1.0 V (0.02 V Steps)
Short Detection Delay Time 300 µs
Conditions for Overcharge Restoration Voltage Release
Conditions for Overdischarge Restoration Latch / Voltage Release
Package TSSOP-28
Cell Balancing Detection Voltage (VCBD) 3.45 V to 4.45 V (0.005 V Steps)
Cell Balancing Release Voltage VCBD to VCBD -0.4 V (0.01 V Steps)
0 V Charge Available
  • *1 VDET31: Set to meet the following equation: (3×VDET31+0.05<0.8×VSHORT).
  • *2 High standard spec: with improved accuracy for VDET31 / VDET32 / VDET4
  • *3 VDET32 is not detected when VDET32 is higher than VSHORT.

Download Datasheet

Protections / Functions

Functional Description

Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening

Technical Documents

Typical Application: 5-cell Protection Battery Charger with Cell-balancing Enabled

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
TSSOP-28 R5436T R5436T-FF

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

Temperature Protection Temperature Protection
Reset Reset Function
Alarm Alarm Function
Cell Balance Cell Balance Function
Cascadable Cascade Connect Function
Open Wire Detection Open Wire Detect Function
Wakeup Wakeup Function
Short-circuit Current Detection Short-circuit Current Protection
Delay Time Shorting Output Delay Time Short Function

For more details, please refer to "Externally Configurable Protections and Their Advantages".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 3,4,5
Functions Temperature Protection,Cell Balance,Cascadable,Open Wire Detection,Short-circuit Current Detection,Delay Time Shortening