1. ABLIC's Battery Protection ICs

Battery protection ICs protect batteries from hazards such as overcharging, overdischarging and overcurrent.
ABLIC has been developing and producing battery protection ICs since 1993, and has a track record of approximately 30 years in the industry.

ABLIC's battery protection IC design history

Lineup Diversity Facilitating “Appropriate Circuit Configuration”

If we include products that can be used with multi-cell batteries and automotive applications, our lineup offers about 2,100 products. Our vast product lineup provides strong support for developing safety-critical battery packs with secondary protection and other features to suit customer needs such as smaller, lighter, and thinner applications and the cascade connection of a large number of battery cells in series.

A 30-year Track Record Contributing to Safety and Security

In development and commercialization of products over a 30-year period since 1993, we have built and used the following knowhow,

  • Safety-critical product design
  • Advanced manufacturing technology
  • Reliable quality control

to provide our customers with safe and secure products.

Improving “Battery Pack Performance”

The high-withstand voltage CMOS process used in ABLIC's 1-cell battery protection ICs endows them with high accuracy and low power consumption. These ICs are also provided with the latest distinctive state-of-the-art functions optimized for a variety of applications enabling our customers to create battery packs with the performance they require.

ABLIC's 1-cell battery protection ICs. Improving battery pack performance

Lineup of “Automotive Grade” High-quality Protection ICs

ABLIC offers a host of products for use in automotive applications.
The development of electric vehicles (EV) and autonomous driving is increasing the demand for batteries as the power source of an automotive system. ABLIC provides a lineup of automotive protection ICs for use in battery management systems (BMS) that manage automotive batteries.

ABLIC's automotive IC lineup

Since automotive protection ICs must satisfy the high quality and high reliability required of automotive applications, we adopt the AEC-Q100 tests of the Automotive Electronics Council (AEC) to assess the reliability and quality of our products. They are also PPAP (Production Part Approval Process) capable.
In addition, we can provide protection ICs developed for automotive BMS in accordance with ISO26262 Functional Safety Standard, and a Safety Manual.
ABLIC's automotive protection ICs can be used for automotive applications that require higher safety.

 

2. Advantage of ABLIC's Battery Protection ICs for 1-cell Pack

Ultra-small packages and low current consumption:
  • ・Reduces space saving in the circuit board area of wearable devices and portable devices.
  • ・Suppresses the current consumption in applications using small-capacity lithium-ion batteries.
  • ・Significantly reduces battery depletion of customers' products during the post-shipment inventory period by equipped our products with power-saving function.
A diverse product lineup with features such as high-accuracy overcurrent detection and temperature protection:
  • ・Achieves a high level of safety with protection circuits, even for applications with high charge/discharge currents.
  • ・Offers a wide range of products to cater to various applications, for situations requiring rapid charging and external control.
  • ・Able to provide circuits with a high level of safety, including dual protection circuits and other specific requirements tailored to the customer's needs.
Technical capabilities to support the realization of optimal protection circuits
  • ・We provide technical support from selecting and combining optimal products to designing customized protection circuits. For details, please contact our sales representatives.

 

 

4. Function Description

  • Temperature Protection Function
  • Power-saving Function
  • CTL Pin Function
  • Alarm Function
  • Battery Voltage Monitoring Pin
  • Overcurrent Detection Function
Temperature Protection Function

An external NTC thermistor can be used to monitor the temperature and control charging and discharging.

Function Description: Temperature Protection Function

Power-saving Function

Discharge current of the battery pack and current consumption of the protection circuit can be virtually eliminated during shipping of the battery pack.

Function Description: Power-saving Function

CTL Pin Function
Delivers Charge-discharge Control and Temperature Protection

An external input to the CTL (charge-discharge control signal input) pin activates the charge-discharge control function and disables battery charge and discharge.
By connecting a PTC thermistor to the CTL pin, the IC delivers temperature protection by disabling charging and discharging of the battery pack at high temperatures.

Function Description: CTL Pin Function

Alarm Function

This function accurately detects the battery voltage even during fast charging and outputs an alarm signal.

Function Description: Alarm Function

For details on the alarm function, please refer to the S-82L1/T1/U1/V1 product overview.

Battery Voltage Monitoring Pin

The battery voltage monitoring pin (BS pin) is a pin that outputs the voltage of the negative side of the battery (VSS).
Accurate battery voltage monitoring, even during fast charging, is ensured by the BS pin without being affected by voltage drops in the on-resistance of current detection resistors or charge and discharge control FETs.

With a BS Pin

A charging management IC can control charging by monitoring the voltage between the P+ and BS pin. Optimal charging control can be achieved because the IC can monitor a voltage almost identical to that of the battery, resulting in reduced charging time.

Function Description: With Battery Voltage Monitoring Pin

 

Battery Voltage Monitoring Pin
Without a BS Pin

The charging management IC (charger) has no choice but to control charging by monitoring the voltage between P+ and P-. Since there are resistance components between VSS and P-, such as the current detection resistors or charge and discharge control FETs, there will always be a voltage difference between VSS and P- depending on the charge current. This voltage difference makes optimal charging control difficult and increases charging time.

Function Description: Without Battery Voltage Monitoring Pin

Overcurrent Detection Function

This function stops charging/discharging when an abnormal charging/discharging current occurs.

When High-accuracy Overcurrent Protection is Required (Using a Current Detection Resistor)

By using an external current detection resistor to deliver high-accuracy overcurrent protection, battery voltage and temperature fluctuations are unlikely to occur.
When a battery in the normal status is in the status where the VINI pin voltage is equal to or higher than discharge (charge) current detection voltage because the discharge (charge) current is equal to or higher than the specified value and the status continues for the discharge (charge) overcurrent detection delay time or longer, the discharge (charge) control FET is turned off and discharge (charge) is stopped.

Function Description: Overcurrent Detection Function (High-accuracy Overcurrent Protection)

 

Overcurrent Detection Function
When Simple Overcurrent Protection is Required (Without a Current Detection Resistor)

By using the on-resistance of the discharge control FET and charge control FET, a simple protection circuit is achieved without an external current detection resistor.
When a battery in the normal status is in the status where the VM pin voltage is equal to or higher than discharge (charge) current detection voltage because the discharge (charge) current is equal to or higher than the specified value and the status continues for the discharge (charge) overcurrent detection delay time or longer, the discharge (charge) control FET is turned off and discharge (charge) is stopped.

Function Description: Overcurrent Detection Function (Simple Overcurrent Protection)

 

5. Product Lineup of Battery Protection ICs for 1-cell Pack

  • All Products
  • Battery Protection
    (FET Ron)
  • Battery Protection
    (Sense Resistor)
  • Secondary Protection
Battery Protection (FET Ron)
Battery Protection (Sense Resistor)
Secondary Protection
Application Product name Category
(Overcurrent detection method)
CTL pin
function
CTL pin function
Power-saving
function
Power-saving
function
Battery voltage
monitoring pin
Battery voltage
monitoring pin
Alarm
Function
Alarm function
Temp. protection
function
Temp. protection function
Separate charge and
discharge paths
Double Protection
Config.
Buy online Remarks
S-8240A

Battery Protection
(FET Ron)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-8240B

Battery Protection
(FET Ron)
chip1stop corestaFF ONLINE Digi-Key MOUSER High-accuracy
overcurrent
detection
S-82D1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82F1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82F1B

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82G1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82G1B

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82K1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82K1B

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82L1A

Battery Protection
(FET Ron)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82M1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER Low current consump.
S-82N1A

Battery Protection
(FET Ron)
chip1stop corestaFF ONLINE Digi-Key MOUSER Low current consump.
S-82N1B

Battery Protection
(FET Ron)
chip1stop corestaFF ONLINE Digi-Key MOUSER Low current consump.
S-82P1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82P1B

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82R1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82S1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82T1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82U1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82V1A

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82Y1B

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-82Y1C

Battery Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-8206A

Secondary Protection chip1stop corestaFF ONLINE Digi-Key MOUSER  
S-8216A

Secondary Protection
(Sense Resistor)
chip1stop corestaFF ONLINE Digi-Key MOUSER Discharge overcurrent detection
Battery Protection (FET Ron)
Battery Protection (Sense Resistor)
Secondary Protection

 

6. Packages

 

7. Try ABLIC's battery protection ICs for 1-cell Pack

ABLIC's battery protection ICs for multi-cell pack can be purchased online. They are highly recommended.