Enhancing the safety of backup power systems
Advanced lithium-ion battery protection for e-Call and TCU backup power systems.
Automotive quality capable of withstanding harsh environments ranging from -40°C to +125°C.
Contributing to the miniaturization and weight reduction of backup power systems with a simplified protection circuit.
Automotive, 125°C Operation,
Battery Protection IC for 1-cell Pack
S-19161A/B Series
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The World’s First* Automotive 1-cell Battery Protection IC Enhances Backup Power Safety.
Ideal for Lithium-ion Battery Protection in Backup Power Systems.
In-vehicle systems such as e-Call and TCU are equipped with backup power systems to maintain their operation for a certain period, even if the 12V lead-acid battery stops functioning. Recently, there has been a shift in backup power sources from nickel-metal hydride batteries (Ni-MH batteries) to lithium-ion batteries, which are smaller and lighter. The S-19161A/B Series is the world’s first* automotive 1-cell battery protection IC, making it ideal for protecting lithium-ion batteries used in backup power systems.
*As an automotive 1-cell battery protection IC. Based on our research as of January 2025.
Automotive Quality that Withstands Harsh Environments.
The S-19161A/B Series operates over a wide temperature range, from -40°C to +125°C. Additionally, it is AEC-Q100 (Grade 1) qualified* and PPAP capable, ensuring reliability for automotive applications.
In addition to automotive applications, it can also enhance the safety of equipment in applications that require high-temperature operation.
*The test is currently in process and is scheduled to be completed by October 2025.
Miniaturization and Weight Reduction of Backup Power Systems.
Lithium-ion batteries have a higher output voltage compared to nickel-metal hydride batteries, allowing for a reduction in the number of cells required when used as a backup power source. This, in turn, enables a more compact and lightweight design. By using the S-19161A/B Series for their protection, a simple protection circuit can be constructed.
Applications
Automotive Devices
- e-Call
- TCU (Telematics Control Unit)
- Smart Key
- Backup Power System
Devices requiring high-temperature operation capability.
Product Lineup of Automotive Lithium-ion Battery Protection ICs / EDLC Voltage Monitoring ICs
Specifications
| Product name | S-19161A | S-19161B | |
|---|---|---|---|
| Automotive | |||
| Number of cells | 1-cell | ||
| Overcharge detection voltage | 3.50V to 4.80V (±15mV) | ||
| Overdischarge detection voltage | 2.00V to 3.00V (±50mV) | ||
| Discharge overcurrent 1 detection voltage | 0.005V to 0.100V (±1.5mV) | 0.003V to 0.100V (±1.0mV) | |
| Discharge overcurrent 2 detection voltage | 0.010V to 0.100V (±3.0mV) | 0.006V to 0.100V (±2.0mV) | |
| Load short-circuiting detection voltage | 0.020V to 0.100V (±5.0mV) | 0.020V to 0.100V (±4.0mV) | |
| Charge overcurrent detection voltage | -0.100V to -0.005V (±1.5mV) | -0.100V to -0.003V (±1.0mV) | |
| 0V battery charge | Enabled, inhibited | ||
| Absolute maximum rating | 28V | ||
| Current consumption | During operation | 4.0μA max. (Ta = +25°C) | |
| During power-down | 50nA max. (Ta = +25°C) | Package | SOT-23-6 |
| Operation temperature range | Ta = -40°C to +125°C | ||
| Automotive quality | AEC-Q100 in process, PPAP capable | ||
| Datasheet | |||
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S-19161A Series
S-19161B Series