Press release - 15 January 2025 10:00

ABLIC Launches Battery Protection IC to Transform Automotive Safety Backup Power Systems

Enables miniaturization through transition from nickel hydride to lithium batteries

ABLIC (President: Seiji Tanaka, Head Office: Minato-ku, Tokyo; hereinafter “ABLIC”), a MinebeaMitsumi Group company, today announced the launch of the S-19161A/B that enables automotive manufacturers to significantly miniaturize backup power systems. Operating at 125°C, this IC allows vehicle manufacturers to replace multiple nickel hydride batteries with a single lithium battery in emergency backup power systems.

Conventional automotive backup power systems require multiple nickel hydride batteries to maintain emergency functions when the main power supply fails. The S-19161A/B's innovative protection features enable the use of a single lithium battery, delivering the same functionality in a more compact form factor.

The IC operates across an industry-leading temperature range of -40°C to 125°C, exceeding conventional 85°C limits. It features industry-leading overcharge detection accuracy of ±15mV with three-level discharge overcurrent protection.
Designed for emergency call (e-Call) systems and Telematics Control Units (TCUs), the S-19161A/B meets Production Part Approval Process (PPAP) requirements and is undergoing AEC-Q100 Grade 1 certification for automotive IC quality standards.
This advancement supports the automotive industry's push toward miniaturization and more efficient designs.

ABLIC will continue to expand its automotive protection IC portfolio and develop new lithium-ion battery protection ICs for diverse applications.

ExampleCircuits_theS-19161AB — Example of protection circuits using the S-19161A/B

Key Features

1. Achieves operation in high temperatures up to 125℃
Operating across a temperature range of -40℃ to 125℃, this IC significantly exceeds the conventional 85℃ limit of most protection ICs. This enables enhanced protection for 1-cell automotive batteries and improves safety in high-temperature applications.

2. High degree of safety through 3 levels of discharge overcurrent protection
The product is equipped with 3 levels of discharge overcurrent protection; 1) discharge overcurrent 1, 2) discharge overcurrent 2, and 3) load short-circuiting; making it possible to isolate abnormal current in safer areas. This achieves industry top-class detection voltage accuracy and improves application device safety.

3. Industry top-class overcharge detection voltage accuracy of ±15mV
The IC achieves industry-leading overcharge detection accuracy of ±15mV, optimizing battery performance while maintaining robust safety protection.

Major Specifications

・Overcharge Detection Voltage: 3.50 to 4.80V ±15mV
・Overdischarge detection voltage: 2.00 to 3.00V ±50mV
・Discharge overcurrent 1 detection voltage: 0.003 to 0.100mV ±1.5mV (S-19161A Series), 0.003 to 0.100V ±1.0mV (S-19161B series)
・Discharge overcurrent 2 detection voltage: 0.006 to 0.100V ±3.0mV (S-19161A Series), 0.006 to 0.100V ±2.0mV (S-19161B Series)
・Short-circuit detection voltage: 0.020 to 0.100V ±5.0mV (S-19161A Series), 0.020 to 0.100V ±4.0mV (S-19161B Series)
・Charge overcurrent detection voltage: -0.100 to -0.003V ±1.5mV (S-19161A Series), -0.100 to -0.003V ±1.0mV (S-19161B Series)
・Charging of 0V batteries (allowed, prohibited)
・Current consumption during operation: 4.0µA max.
・Current consumption during power-down: 50nA max.
・Max rating: 28V
・Operating temperature: -40 to +125℃
・Packages: SOT-23-6: 2.9×2.8×t1.35mm max.

Application Examples
Lithium-ion rechargeable battery packs,
Lithium polymer rechargeable battery packs