The ICs support 3 to 5 LED battery displays, reduce power use, need no microcontroller, and offer two modes for battery indication.
ABLIC Inc., a group company of MinebeaMitsumi Inc., has announced the release of two voltage monitoring IC series: the S-82F9 Series for driving 5 LED indicators and the S-82D9 Series for 4 LED indicators. These ICs are used for battery level displays and provide voltage monitoring without requiring a microcontroller.
Battery level indicators in applications such as power tools have often used discrete components or microcontrollers to drive LEDs, which can increase circuit size and power use. ABLIC’s ICs address these issues by integrating multi-voltage monitoring into one chip. This reduces the number of components and decreases board area and power use.
The voltage monitoring ICs support 3 to 5 LED indicators. The S-82F9 Series drives up to 5 LEDs, and the S-82D9 Series supports up to 4 LEDs, adding to the S-8229A Series, which supports 3 LEDs. This lineup allows customers to choose ICs based on the number of LEDs in their applications.
Both series operate without a microcontroller and allow battery power display with lower power use. The A Series includes an enable pin that turns off the IC when LEDs are off, reducing current to 0.1 µA. The B Series includes a SENSE pin for monitoring voltages beyond the IC’s ratings by using external components. This function supports battery level displays in different systems.
Some of the key features of the S-82F9 and S-82D9 series include:
- 3, 4, or 5 LED options (S-8229, S-82D9, S-82F9)
- EN pin saves power (A Series)
- SENSE pin checks high voltage (B Series)
- “All on” mode: more LEDs light as battery rises
- “Step on” mode: LEDs light at set battery levels
The LED indication method can be selected from two types. The “full charge all on” mode lights more LEDs as voltage increases. This method helps show battery level more clearly.
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