1-cell battery protection IC

S-82L1/T1/U1/V1 Series

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Battery Protection ICs Best for Fast Charging

  • High-accuracy monitoring of battery voltage with an alarm function
    enables simple and safe fast charging.
  • Overcharge detection voltage accuracy of ±12mV
    maximizes battery performance.
  • Overcurrent detection voltage accuracy of ±0.75mV
    suppresses heat generation in the protection circuit board.

1-cell battery protection IC with the industry's first* alarm function

S-82L1/T1/U1/V1 Series

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The industry's first* alarm function supports safe,
highly efficient fast charging!

Solves the fast charging issue

When fast charging occurs, as the charge current increases, it becomes difficult to accurately monitor the battery voltage due to the current detection resistance and the FET on-resistance.

The S-82L1/T1/U1/V1 series with the industry’s first* alarm function (AO pin) can monitor the voltage between VDD and VSS with a high accuracy of ±12mV, which is less affected by these resistance, and alarm signal can be output to the charge control circuit. This allows the charge control circuit to accurately detect the battery voltage without using an AD converter, instinctively adjusting the amount of current and charge voltage.

This IC supports safe, highly efficient fast charging, contributing to an improved device safety level and longer battery life.

*As a 1-cell battery protection IC.
Based on our research as of November 2022

A safe and highly efficient fast charging method with an alarm function

The charge control circuit charges the battery at a constant current until an alarm signal is outputted, and then subsequently decreases the charge current in accordance with the alarm signal. When the charge current is lowered, the battery voltage drops, stopping the alarm signal, and the battery will continue to charge until the alarm signal is outputted again.

By operating this method of control, the battery voltage can be accurately detected without the use of an AD converter, and can be safely charged to full capacity in a short time.

A battery-friendly charging method with an alarm function

It is imperative that Lithium-ion batteries are inhibited from charging outside the recommended temperature range, therefore charge control circuits are generally equipped with a temperature monitoring function.
The alarm function can be used to control the charge voltage according to temperature levels without the use of an AD converter; this enables friendly charging that is safe, and prevents battery degradation.

Maximize battery performance

The S-82L1/T1/U1/V1 series offers the industry’s top class* overcharge detection voltage accuracy of ±12mV.
It maximizes battery performance by improving charge capacity and usage time while still ensuring battery pack safety.

Use of a SNT-6A(1.57 x 1.8 x t0.5 (max.) mm) and HSNT-8(1616)(1.6 x 1.6 x t0.4 (max.) mm), the industry’s smallest class of package*, has significantly reduced the size of the protection circuit board.

*As a 1-cell battery protection IC.
Based on our research as of November 2022

Suppresses heat generation in the protection circuit board

The S-82V1 series offers the industry’s top class* charge/discharge overcurrent detection voltage accuracy of ±0.75mV.
This reduces variation in overcurrent detection while lowering resistance in current detection resistance. This enables the possibility to suppress heat generation in the protection circuit board even as the charge current increases.

*As a 1-cell battery protection IC.
Based on our research as of November 2022

Application

  • Smartphone
  • Tablet PC
  • Headset
  • Smartwatch
  • Activity tracker
  • Wireless earphones

Battery Protection ICs Lineup

Specifications

Product name S-82L1A S-82T1A S-82U1A S-82V1A
  For general-use
Number of cells 1-cell
Function Alarm function Sense resistance, Alarm function
Overcharge detection voltage (Accuracy) 4.20V to 4.60V (±12mV) 3.50V to 4.80V (±12mV)
Overdischarge detection voltage (Accuracy) 2.00V to 3.00V (±50mV)
Discharge overcurrent
1 detection voltage (Accuracy)
0.003V to 0.100V
(±3mV)
 0.003V to 0.100V 
(±1.5mV)
 0.003V to 0.100V 
(±1mV)
 0.003V to 0.100V 
(±0.75mV)
Discharge overcurrent 2
detection voltage (Accuracy)
0.010V to 0.100V
(±3mV)
0.010V to 0.100V
(±2mV)
0.010V to 0.100V
(±1.5mV)
Current comsuption during operation 0.8μA typ., 1.5μA max.
(Ta = +25°C)
2.5μA typ., 5.0μA max.
(Ta = +25°C)
Current comsuption during power-down 0.05μA max. (Ta = +25°C)
Packages SNT-6A HSNT-8(1616)
Operation temperature range Ta= -40°C to +85°C
Datasheet

Datasheet

Datasheet

Datasheet

Datasheet

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S-82L1A Series

S-82T1A Series

S-82U1A Series

S-82V1A Series