STC3105
Battery monitor IC with alarm output for gas gauge applications-
NRND
The STC3105 battery monitor includes the hardware functions required to implement a low-cost gas gauge for battery monitoring. The STC3105 uses accurate measurements of the battery voltage to estimate a battery’s state-of-charge (SOC). It uses a low cost sense resistor to precisely sense the charge or discharge states, detect light-load conditions without ambiguity for voltage measurements, and accurate SOC calculation. The coulomb counter method is used for SOC tracking in high-load conditions.
An alarm output signals a low SOC condition, and can also indicate low battery voltage. The alarm threshold levels are programmable.
The device is programmable through an I2C interface.
Download
Datasheet
Key Features
- 0.5% accuracy battery voltage monitoring
- Low battery alarm output with programmable thresholds
- Low power: 60 μA in power-saving mode, 2 μA max in standby mode
- Ideal for implementation of robust gas gauge systems using open-circuit voltage and coulomb counter methods
- Small 3x2 mm package
Design Resources
TopTechnical Documentation
Product Specifications
| Description | Version | Size |
|---|---|---|
DS8643: Battery monitor IC with alarm output for gas gauge applications
|
1.0 | 321 KB |
Application Notes
| Description | Version | Size |
|---|---|---|
|
AN3395: Sensing resistor selection and usage in STC310x battery monitoring applications
|
1.2 | 149 KB |
User Manual
| Description | Version | Size |
|---|---|---|
|
UM1054: STEVAL-ISB013v1 demonstration board based on the STC3105 battery monitor IC with alarm output for gas gauge applications
|
1.2 | 305 KB |
|
UM1481: STEVAL-ISB012V1 Li-Ion battery monitor and gas-gauge based on the STC3105
|
1.0 | 5,356 KB |
Related Tools and Software
Related Tools and Software
| Part Number | Description |
|---|---|
| STEVAL-ISB012V1 | Battery monitoring system demonstration board based on the STC3105 |
| STEVAL-ISB013V1 | Battery monitor demonstration board with alarm output for gas gauge applications based on the STC3105 |
Sample & Buy
Top| Part Number | Marketing Status | Package | Packing Type | Operating Temperature (min) | Operating Temperature (max) | Automotive Grade | Order From ST | Unit Price (US$)* @ 1000 | Distributor Availability | RoHS Compliance Grade | Download Material Declaration** |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STC3105IQT | NRND | TDFN 3.0X2.0X0.75 8L PITCH 0.65 | Tape And Reel | -40 | 85 | _ | - | 1 |
| Ecopack2 | PDF XML | |||||||||||||||
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors (**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices. |
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