ON Semiconductor supplies highly integrated radio and power-conversion products which make it possible to implement a simple, low-cost system for wirelessly dimming LEDs powered by a direct AC LED driver.
The circuit is based on a highly integrated Bluetooth® Low Energy radio System-In- Package (SIP), the RSL10 SIP, which enables wireless control of an LED fixture’s brightness. At the fixture, the ON Semiconductor NCL30170 implements a direct AC power-conversion circuit to provide a tightly regulated current to an LED lamp. Light intensity can be dynamically set by the user via a programmable dimming function, controlled with a smartphone app. Thanks to the devices’ low-power technology, the overall system off ers stand-by consumption of less than 200mW even though it does not use a switch-mode power supply.
Bluetooth Low Energy SIP Includes Radio Transceiver and Antenna
ON Semiconductor’s RSL10 SIP is a complete Bluetooth® 5 certifi ed Low Energy wireless SIP including a 2.4GHz radio transceiver, antenna and passive components. It provides the easiest way to implement low-power Bluetooth Low Energy technology in wireless applications including wireless dimmer modules.
ON Semiconductor: Selection of power and radio parts for wireless LED dimming and power
The RSL10 SIP, which has the part number NCH-RSL10-101S51-ACG, supports both Bluetooth Low Energy and proprietary 2.4GHz radio protocols. Featuring ON Semiconductor’s RSL10 2.4GHz System-on-Chip (SoC), the RSL10 SIP off ers very high radio performance, including Receive sensitivity of -94dBM and Transmit power of up to +6dBm. It supports Firmware Over The Air (FOTA) updating.
The RSL10 SIP provides a complete radio system for devices connecting to a Bluetooth Low Energy network. It includes two processor cores, an Arm® Cortex®-M3 controller core and an LPDSP32 for intensive signal-processing functions. It also has built-in power management, 384kbytes of Flash memory and configurable analog and digital sensor interfaces. Both the RSL10 and RSL10 SIP feature an AES-128 encryption engine to protect transmitted data.
Fully certified to worldwide wireless standards, the RSL10 SIP markedly reduces time-to-market and cost by removing the need for antenna design.
In a dimmer module circuit, the RSL10 SIP may be supplied by an ON Semiconductor NCP786A ultra-low quiescent current linear regulator operating directly from an AC input rectified by an RS1A.
Ultra low-power smart lighting dimmer with RSL10 SIP