Part Details for LM2903 by Fairchild Semiconductor Corporation

This Near Field Communication (NFC) reference design provides a firmware example for the implementation of an NFC Card Emulation application using the TRF7970A NFC transceiver. This reference design provides a small number of easy to use Application Programming Interfaces (APIs) which allow users

This reference design provides a low BOM count: high-efficiency power stage for smart thermostats and other gateway building automation designs. This power stage takes a 24-V AC input and produces a 5-V and 3.3-V output rail: which can power additional point-of-load converters if added. The design provides LiPo battery charging and seamless switching to battery power during a 24-V AC brownout. The power-path capability provides battery power assistance allowing load transient to exceed the current limit of the 24-V AC to DC system: allowing a lower cost wide-Vin buck to be used. The battery fuel gauge helps designers preserve battery life and ensure proper operation by helping the central processor make smarter decisions on power saving and system functionality.

Automotive battery power supply lines are prone to transients while running the system. Typical protections required are overvoltage: overload: reverse polarity and jump start. During the life of a vehicle: the alternator may be replaced with a non-OEM part. The after-market alternator may have different or no load dump protection which could lead to damaging the electronic control unit (ECU). This reference design provides protection to handle these potential unsuppressed load dump pulses (12 V and 24 V) with hardware control. Class-A operation may be attained during unsuppressed load-dump pulses.

The TIDA-00661 reference design features signal processing front-end subsystem for electronic trip units (ETU) used in air circuit breakers (ACB) or molded case circuit breakers (MCCB). This subsystem consists of Delta-Sigma ADC with 24-Bit resolution and fast startup (

PMP20682 是一种采用 LM5141-Q1 同步降压控制器 IC 的同步降压转换器参考设计。此设计接受 5V 至 40V 输入电压，并提供 3.3V 输出，能够为负载提供 10A 电流。输入端包含一个 EMI 滤波器。可选频率抖动和压摆率控制功能可用于实现额外的 EMI 控制。此设计为底部 MOSFET 散热器提供了安装孔。

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for low dropout regulator (LDO)) generates the isolated power. Shunts that are interfaced to ±50-mV input range isolation amplifiers configured as channel isolated inputs measure the current. Potential divider output interfaced to ±250-mV or ±12-V input range isolation amplifiers configured as group isolated inputs measure the voltage. The outputs of the isolation amplifiers interface directly to 24-bit delta sigma analog-to-digital converter (ADC) or are scaled to ±10 V using gain amplifiers and interfaced to 16-bit SAR ADC for performance evaluation. On-board digital diagnostics improves reliability and enhances system performance.

This reference design is a carbon monoxide (CO) and fire alarm detector reference design which can identify typical alarm sounds: and has the wireless capabilities to alert the user if one is detected. This design is intended for home automation and

此参考设计是采用通用线路的多输出隔离型反激式设计。主要稳压输出为 3.3V (350mA)，5V 和 12V 输出通过线性稳压器进行调节，24V 输出采用一个小型电荷泵产生。转换器利用共源共栅反激式拓扑技术和准谐振工作模式，在轻负荷情况下可提供低 EMI 和高效率。

TIDA-00550: a dual channel-to-channel isolated universal analog input module reference design for programmable logic controllers (PLCs): combines precision and flexibility. This reference design: used in conjunction with sensor transmitters: can measure standard input voltages and currents as well as thermocouples: RTD and 4-20-mA loops. With only four input terminals: it is suited for applications where smallest real-estate: high versatility and performance is required at the same time.

THe TIDA-00498 reference design features signal processing front-end and self-power block for electronic trip unit (ETU) used in circuit breakers.  A FRAM based micro-controller is used for processing current inputs from signal conditioning amplifiers for 3-phase: neutral and ground current. Two gains are used to extend the range for phase current measurement.This reference design can also self-power using rectified current input. TIDA-00498 is desiged for fast and repeatable tripping (within 30mS) for wide current and temperature range.

The PMP8930 reference design uses the UCC28710 primary-side regulated flyback controller to generate a 20V output from a univeral AC input. a bulk capacitor with slow-charge-fast-discharge circuit is placed at flyback output to provide long hold up time for the following step-down DC-DC stages. TPS54335 is used as the controller and power stage for the main 4V or 12V output. The valley switching of the UCC28710 allows this low-cost design to achieve a maximum load efficiency of 83%; no load losses are less than 70mW.

TIDA-00179 is an EMC-compliant universal digital interface to connect to absolute position encoders like EnDat 2.2: BiSS®: SSI or HIPERFACE DSL®. This reference design supports a wide-input voltage range from 15 V to 60 V (24-V nom). A connector with 3.3-V logic I/O signals allows for direct interface to the host processor like Sitara AM437x or Delfino F28379 to run the corresponding master protocol.Master implementations are available on Sitara AM437x (EnDat2.2: BiSS and HIPERFACE DSL) or Delfino DesignDRIVE (EnDat2.2 and BiSS). This design allows the host processor to select between a 4-wire encoder interface like EnDat 2.2 and BiSS or a 2-wire interface with power over RS-485 like HIPERFACE DSL. To meet the selected encoder's supply range: the design offers a programmable output voltage with either 5.25 V or 11 V. The design's power supply offers protection against over-voltage and short circuit according to the selected encoder's voltage range to prevent damage during a cable short. TIDA-00179 has been tested up to 100-m cable length with EnDat 2.2 and 2-wire HIPERFACE DSL encoders.

The TIDA-01358 reference design provides a low BOM cost: high efficiency power stage solution for smart thermostats and other gateway building automation end equipment. This power stage takes a 24Vac input and produces a 5V and 3.3V output rail which can power additional point-of-load converters if added. The design provides LiPo battery charging and seamless switching to battery power during a 24Vac brownout. The power-path capability provides battery power assistance allowing system load transient to exceed the current limit of the 24Vac to DC system: allowing a lower cost Wide Vin buck to be utilized.

High efficiency, high power factor and reliable power supply are the main focus of the PMP9640 design for motor driver applications.  Low cost analog transition mode (TM) PFC controller UCC28051 has been used for bridgeless PFC as the first conversion stage of the PMP9640.  LLC series r

This converter is used for Class 1 PoE PD applications where isolation is not required.  The TPS2378 PD controller plus LM5006 buck converter provide 5V/560mA with good efficieny in a small size.  The LM5006 can be configured with a diode rectifier for lowest cost or a synchronous FET r