Ideal for simple battery level indication
- Low power & space saving:
Microcontroller-less simple battery level indication. - Low power mode & high voltage monitoring:
Two pin configurations suit a variety of user needs. - 5 or 4 LEDs:
Selectable LED lighting methods for various applications.
Simple Battery Level Indication IC
S-82F9, S-82D9 Series
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Simple Battery Level Indication with Low-power and Space-saving, Possible without a Microcontroller.
Microcontroller-less Simple Battery Level Indication
The S-82F9/82D9 Series can light up 5 or 4 LEDs and monitors voltage to provide a simple indication of the remaining battery level. Integrating multiple voltage monitoring functions into a single IC helps save space in systems. Furthermore, operating without a microcontroller reduces power consumption for battery voltage monitoring.
Additionally, the S-8229A Series, capable of lighting up 3 LEDs, allows you to select the optimal IC based on the number of LEDs required for battery level indication.
Two Pin Configurations for Diverse User Needs
The S-82F9/82D9 Series offers a choice between EN (Enable) and SENSE pins, making it ideal for simple battery level indication in various devices.
EN Pin Equipped (A Series):
By turning off the IC when the LEDs are not lit, the current consumption of the IC itself is suppressed to 0.1μA max, contributing to lower power consumption in battery-powered devices.
SENSE Pin Equipped (B Series):
By combining with external components, voltage monitoring is possible even with batteries in series that exceed the IC’s 28V rating.
Selectable LED Lighting Methods for Various Applications
Two LED lighting methods are available: “Full charge all on” and “Individual step voltage on,” allowing users to choose the optimal option for their application.
Full charge all on
The number of lit LEDs increases according to the battery voltage.
Individual step voltage on
Only one LED corresponding to the battery’s voltage range is lit.
Applications
- Cordless Power Tool
- e-Bike
- Cordless Cleaner
For further reading
ICs ideal for Cordless Power Tools
Product Lineup of Battery Monitoring ICs
Specifications
| Product name | S-82F9 | S-82D9 | |
|---|---|---|---|
| For general-use | |||
| Number of LEDs lit | 5 | 4 | |
| Detection voltage (Accuracy) | 7.5V to 21.5V (±1.0%) | ||
| Current consumption | During operation | 10μA max. | |
| During power-off | 0.1μA max. | ||
| EN pin | Allows for reduction of current consumption by using an external signal to turn off this IC (A Series) |
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| SENSE pin | The SENSE pin and external components enable battery monitoring equal to or higher than the rated voltage of the IC (B Series) |
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| Output logic | Full charge all on (Multiple LEDs are lit depending on the voltage range.) Individual step voltage on (Only one LED is lit depending on the voltage range.) |
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| Absolute maximum rating | 28V | ||
| Package | HTMSOP-8 | ||
| Operation temperature range | Ta = -40°C to +85°C | ||
| Datasheet | |||
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S-82F9 Series
S-82D9 Series