The bottom side of the STEVAL-ILL082V1 board is figured below.
Figure 5: STEVAL-ILL082V1 key components (bottom view)
Key bottom side components include:
•HVLED815PF: offline constant current LED driver with primary-sensing, integrated
MOSFET, high power factor, low THD and ability to supply 15 W controlled power.
•SPSGRF: low power sub-GHz module based on SPIRIT1 RF transceiver and BALUN.
It enables wireless connectivity requiring no RF experience or expertise for integration.
It has a programmable radio which supports different modulation schemes (e.g. FSK,
GFSK, MSK, GMSK, OOK and ASK). The output power can vary up to 11.6 dBm and
the receiver sensitivity is -118 dBm. Four GPIOs are available and can be
programmed for 32 different input/output functions. SPSGRF is FCC, IC and CE
certified. It is available in two different carrier frequency versions to cater 868 MHz
SRD and 915 MHz ISM bands.
•STM32L05x: ultra-low power 32-bit RISC microcontroller based on the ARM®Cortex®-
M0+ core, featuring an advanced APB bus, ADC, timer, I²C, SPI and USART.
•STTH1L06 and STTH2L06: ultra-fast high voltage rectifiers, with low reverse recovery
current and low thermal resistance.
•LDL212: a 3.3 V low dropout regulator (LDO) to supply the MCU and SPSGRF.
•SW1: reset switch for the microcontroller and connectivity module.
