STMicroelectronics ALED8102S
ALED8102S - 8 Channels LED driver with direct switch control
The ALED8102S is a monolithic, low voltage, 8 low-side channels LED driver. The ALED8102S guarantees up to 19 V output driving capability allowing users to connect several LEDs in series. In the output stage, 8 regulated current sources provide from 5 mA to 100 mA constant current to drive the LEDs. Current is programmed through a single external resistor.
The ALED8102S is equipped with a thermal management that protects the device forcing it in shutdown (typically: power-off at 170 °C with 15 °C hysteresis to restart). The thermal protection switches OFF the output channels only.
The operative supply voltage range is between 3 V and 5.5 V. The output control is provided by four switch inputs, providing an on/off toggle action suitable also for local dimming. Moreover, on all active output LEDs brightness can be adjusted with a global PWM signal applied to the output enable pin (OE). Outputs can be connected in parallel, or left unconnected if not used, as required by the application.
Features
- AEC-Q100 grade 1 qualified
- Operating temperature range: -40 °C < TJ < +150 °C
- 8 constant current output channels controlled by four switch inputs
- Output enable input for global dimming
- Output current: from 5 mA to 100 mA
- Current programmable through external resistor
- Supply voltage: 3 V to 5.5 V
- Thermal shutdown
- 19 V current generator rated voltage
- Available in high thermal efficiency HTSSOP exposed pad package
STEVAL-ILL090V1 - Evaluation kit for the ALED8102S 8-channel LED driver with direct switch control
The STEVAL-ILL090V1 evaluation board is based on the ALED8102SXTTR LED driver, which is directly controlled by an STM8 MCU.
It can be supplied via a USB mini connector or through J2 connected to a 12 V power supply.
The board implements two automotive scenarios that you can select via the SW2 switch.
The first one is an ambient light scenario based on three RGB LEDs with configurable brightness and color. You can change color and intensity via the SEL switch and the SW1 rotary switch, respectively. A short flashing signals the right RGB channel selection. If all the RGB channels are flashing, it means that the global brightness has been selected. If no user interaction is detected within about 30 seconds, the RGB LEDs automatically sweep through various color shades. The FADE switch performs a global fade in/fade out action.
The second scenario simulates a motorcycle rear light: two orange LED strips, representing the arrow lights, are placed side by side, separated by a red LED circle, whose function is to simulate the position/stop lights. By slightly rotating the SW1 switch counterclockwise, the left arrow light flashes, whereas a small clockwise rotation makes the right arrow flash memory. The red LED circle brightens up with a medium intensity until the STOP switch is pressed: in this case, the brightness significantly increases, signaling a BRAKE condition. If no user action is performed for a while, the rear tail LED enters the demo mode.
Features
- One ALED8102SXTTR driving two different LED configurations at once
- An STM8 MCU controlling the ALED8102SXTTR
- Two operating modes (manual and demo)
- RoHS and China RoHS compliant
- WEEE compliant (2012/19/UE RAEE II)
silica content library/npi/2022/stmicroelectronics-aled8102s
STMicroelectronics ALED8102S 8 Channels LED driver | Avnet Silica
