Steval-Lll002V1 Key Devices; Figure 6. Steval-Lll002V1 Block Diagram - STMicroelectronics STEVAL-LLL002V1 User Manual

1.3 Evaluation kit block diagram
1.4

STEVAL-LLL002V1 key devices

The STEVAL-LLL002V1
• A7986A: a high efficiency step down 250 kHz (programmable up to 1 MHz) switching regulator with max. 3 A
DC output current. Input voltage varies from 4.5 to 38 V and also depends on the required output. It supports
low dropout operation along with zero load current operation. Overcurrent and thermal protection are
provided for safe board operation. It powers the red LEDs.
• LM2931: an AEC-Q100 qualified 100 mA LDO regulator designed for automotive environments.
• STM8AF6266: an automotive grade 8-bit microcontroller, featuring 10 MIPS at 16 MHz CPU, advance
timers, UART, ADC, robust I/O's, nested interrupt controller.
• L78L33ACUTR: a three terminal positive regulator. It gives output current up to 100 mA and output voltage
of 3.3 V. The L78L series uses as Zener diode/resistor combination replacement, resulting in a lower
quiescent current and lower noise.
• Diode bridge: at the power supply input ensures board operation regardless of the input voltage polarity.
• 48 red SMD LEDs mounted in a 12x4 matrix to display different patterns. The minimum luminous intensity of
a LED is around 3.55 cd with wide viewing angle of 120º and wavelength of 623 nm.
UM2381 - Rev 1
Figure 6. STEVAL-LLL002V1 block diagram
main devices are:
UM2381
Evaluation kit block diagram
page 4/29