Texas Instruments MSPM0L1306/TPS60403 | Demoboard MSPM0L1306

Description

This application note describes three designs of isolated low power supplies for 2-wire loop powered 4 to 20mA field transmitters or sensors, which are all based on primary side half-bridge topology and secondary side Schottky rectification. The design 1 is using a switching frequency of 50kHz and providing the best in class efficiency, which is available on ti.com as TIDA-00349. The design 2 focuses on optimizing the board space with operating switching frequency of 250kHz and using the customized low size transformer. Furthermore, the design 3 provides maximum of flexibility in terms of switching frequency up to 500kHz by using MSPM0 to generate two channels of PWM (Pulse Width Modulation) signals. This application note describes the design 3 in detail.

Features

• Core
• Arm® 32-bit Cortex®-M0+ CPU, frequency up to32 MHz
• Operating characteristics
• Extended temperature: –40°C to 125°C
• Wide supply voltage range: 1.62 V to 3.6 V
• Memories
• Up to 64KB of flash
• Up to 4KB of SRAM
• High-performance analog peripherals
• One 12-bit 1.68-Msps analog-to-digital converter (ADC) with up to 10 total external channels
• Configurable 1.4-V or 2.5-V internal ADC voltage reference (VREF)
• Two zero-drift, zero-crossover chopper operational amplifiers (OPA)
• 0.5-µV/°C drift with chopping
• 6-pA input bias current 1
• Integrated programmable gain stage (1-32x)
• One general-purpose amplifier (GPAMP)
• One high-speed comparator (COMP) with 8-bit reference DAC
• 32-ns propagation delay
• Low power mode down to <1-µA
• Programmable analog connections between ADC, OPAs, COMP, and DAC
• Integrated temperature sensor
• Optimized low-power modes– RUN: 71 µA/MHz (CoreMark)– STOP: 151 µA at 4 MHz and 44 µA at 32 kHz– -STANDBY: 1.0 µA with 32-kHz 16-bit timer running, SRAM/registers fully retained, and 32MHz clock wakeup in 3.2µs
• SHUTDOWN: 61 nA with IO wakeup capability
• Intelligent digital peripherals
• 3-channel DMA controller– -3-channel event fabric signaling system
• Four 16-bit general-purpose timers, each with two capture/compare registers supporting low power operation in STANDBY mode, supporting a total of 8 PWM channels
• Windowed watchdog timer
• Enhanced communication interfaces
• Two UART interfaces; one supporting LIN, IrDA, DALI, Smart Card, Manchester and both supporting low-power operation in STANDBY
• Two I2C interfaces; one supporting FM+ (1 Mbit/s) and both supporting SMBus, PMBus, and wakeup from STOP
• One SPI supporting up to 16 Mbit/s
• Clock system
• Internal 4- to 32-MHz oscillator with ±1.2% accuracy (SYSOSC)
• Internal 32-kHz low-frequency oscillator with ±3% accuracy (LFOSC)
• Data integrity– Cyclic redundancy checker (CRC-16 or CRC-32)
• Flexible I/O features
• Up to 28 GPIOs
• Two 5-V-tolerant open-drain IOs with fail-safe protection
• Development support
• 2-pin serial wire debug (SWD)
• Package options
• 32-pin VQFN (RHB)
• 32-pin VSSOP (DGS)
• 28-pin VSSOP (DGS)
• 24-pin VQFN (RGE)
• 20-pin VSSOP (DGS)
• 16-pin SOT(DYY)
• 16-pin WQFN (RTR)
• Family members (also see Device Comparison)
• MSPM0L13x3: 8KB of flash, 2KB of RAM
• MSPM0L13x4: 16KB of flash, 2KB of RAM
• MSPM0L13x5: 32KB of flash, 4KB of RAM
• MSPM0L13x6: 64KB of flash, 4KB of RAM
• Development kits and software (also see Tools and Software)
• LP-MSPM0L1306 LaunchPad™ development kit
• MSP Software Development Kit (SDK)

Typical applications

• Personal electronics
• Medical and healthcare
• Building security and fire safety
• Lighting
• Grid infrastructure, Communication modules
• Connected peripherals and printers
• Battery charging and management
• Power supplies and power delivery

More information

• Datasheet
• IC product information