R5436 Series
3-Cell to 5-Cell Li-ion Battery Protection IC with Thermal Protection
Download Datasheet
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Description
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.
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Spec
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 3Discharge 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.
Protections / Functions
Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening 
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Technical
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Typical Application: 5-cell Protection Battery Charger with Cell-balancing Enabled
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Quality &
Packages- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
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 "Protecting Li-ion Batteries: Functions and Advantages".