The reference design supplies an enhanced energy resolution tailor-made for the NB-IoT module market, particularly specializing in water and gasoline meters.
Narrowband Web of Issues (NB-IoT) is vital as a result of it allows environment friendly, low-power, and safe connectivity for a lot of IoT gadgets. It facilitates the cost-effective deployment of large-scale IoT networks, permitting for elevated gadget connectivity, improved knowledge assortment, and enhanced automation throughout numerous industries. Microchip has launched a reference design of the NarrowBand (NB) Energy IoT to simplify the design course of. The reference design presents an improved energy resolution for the NB-IoT module market, particularly focusing on specialty water and gasoline meters. Changing expensive and ponderous supercaps with smaller ones of 20 instances decrease worth enhances reliability and effectivity, lowering the necessity for costly elements in your resolution.
The reference design makes use of the reasonably priced MIC2039 programmable high-side present restrict energy swap (0.2A – 2.5A) because the charging present supply. This eliminates the requirement for specialised tooling throughout pre-charge, leading to a extra environment friendly manufacturing course of. By using this exact present supply for supercap charging, the cost or cost restoration time converges extra quickly to the battery pack voltage than an RC charging resolution. Moreover, this design safeguards the battery pack from extreme stress whereas guaranteeing the swiftest and most exact charging course of. The reference design options quick and optimized supercap charging by leveraging the load swap as the present supply.
The load swap allows the disconnection of the supercap from the battery pack, lowering leakage present when excessive energy is pointless. With quick and predictable supercap charging, enabling charging earlier than power-intensive duties begin turns into adequate. The load swap additionally permits disconnecting the supercap from the appliance by disabling it. To accommodate numerous energy necessities, the voltage throughout the supercap can vary from 2.5V as much as 3.65V. An output voltage regulator, the MIC2875 increase regulator, maintains stability. By using a DC-DC increase, your complete battery capability turns into absolutely utilized, minimizing the reliance on extra battery packs. The high-power path is deactivated throughout deep sleep or listening modes, and a low-IQ energy circuit takes over. This circuit incorporates the MCP1711 Low Dropout (LDO) regulator and MIC94060 high-side energy swap. This resolution minimizes the requirement for costly and huge supercapacitors. It additionally decreases or eliminates the necessity for specialised tooling throughout pre-charge. Moreover, it presents an economical charging present supply.
This reference design has been examined by Microchip. It comes with a Invoice of Materials (BOM), schematics, Printed circuit board (PCB) structure, and many others. You could find extra knowledge concerning the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.
