STEVAL-ISQ007V1High-side current-sense amplifier demonstration board based on the TSC101 | Development Boards, Kits, Programmers | 1 | Active | This demonstration board is specifically designed for the TSC101 integrated circuit.
The TSC101 measures a very small voltage drop on a high-side shunt resistor, and, using an internally fixed gain, amplifies the difference into a ground-referenced output voltage; the amplification gain is internally fixed.
Input common-mode and power supply voltages are independent.
The common-mode voltage can range from 2.8 V to 30 V in operating conditions, and up to 60 V in absolute maximum ratings.
The supply voltage can range from 4 V to 24 V.
Current consumption of less than 300 μA over the temperature range and low input bias current (less than 8 μA in standard conditions, a few 100 nA if VCC isn't supplied) are particularly interesting to save power in the application. |
STEVAL-ISQ010V1High-side current-sense amplifier demonstration board based on the TSC102 | Op Amp Evaluation Boards | 1 | Active | The STEVAL-ISQ010V1 demonstration board is specifically designed for the TSC102 device.
The TSC102 measures a very small voltage drop on a high-side shunt resistor and, using an internally fixed gain, amplifies the difference into a ground-referenced output voltage. The amplification gain is internally fixed. The device is housed in a tiny TSSOP8 package.
Input common-mode and power supply voltages are independent. The common-mode voltage can range from 2.8 V to 30 V during operation. Under absolute maximum rating conditions, the Vp and Vm pins can sustain as much as 60 V to handle events like load-dump conditions, and as low as -16 V to deal with reverse battery conditions.
The supply voltage can range from 3.5 V to 5.5 V, therefore the TSC102 can be supplied by the same voltage regulator used for digital circuits.
Current consumption is less than 450 μA over the temperature range, and low input bias current is less than 7 μA in standard conditions. |
| Development Boards, Kits, Programmers | 1 | Active | Current sensing is very useful for protecting applications. The STEVAL-ISQ013V1 demonstration board implements a low-side current sensing which consists in placing a sense resistor between the load and the circuit ground and the resulting voltage drop is amplified using a TS507 op amp.
The common mode voltage is close to ground, whatever the voltage of the power source, so the current sense voltage can be amplified by this low voltage op amp without any restrictions.
The circuit offers very stable electrical characteristics over the entire supply voltage range and is particularly intended for automotive and industrial applications. |
STEVAL-ISQ014V1Low-side current sensing evaluation board based on the TSZ121 op amp | Evaluation and Demonstration Boards and Kits | 1 | Active | The STEVAL-ISQ014V1 product evaluation board implements low-side current sensing which consists in placing a sense resistor between the load and the circuit ground. The resulting voltage drop is amplified using a TSZ121 op amp.
The common mode voltage is close to ground, whatever the voltage of the power source, so the current sense voltage can be amplified by this low voltage op amp without restriction.
The circuit offers very stable electrical characteristics over the entire supply voltage range and is particularly suited for automotive and industrial applications.
Thanks to the highly accurate TSZ121 op amp, precise current measurements can be made through your application without the added cost of high-precision resistors. |
STEVAL-ISS001V2Line interactive 450 W UPS reference design - 230 V / 50 Hz model | Development Boards, Kits, Programmers | 1 | Active | This UPS reference design was built employing off-line topology with AVR boost and buck regulation of the mains. The inverter module contains the push-pull DC-DC converter and the DC-AC output full bridge generating a quasi-sine waveform.
A microcontroller controls all UPS functions. It monitors the mains parameters (input/output mains voltage and phase, output inverter voltage, battery voltage, output current and output power) in order to ensure the proper level of the output voltage.
The UPS was designed with RS-232 joint signal and USB interfaces (USB for RS-232 converter). It is possible to connect the UPS to a PC using an RS-232 or USB cable and control the UPS status through the "UPS Monitor 3.0x" software that must be installed on the same PC. |
STEVAL-ISV006V2Up to 5 W solar battery charger with embedded MPPT based on SPV1040 | Evaluation Boards | 1 | Active | The STEVAL-ISV006V2 demonstration board is based on the SPV1040 high efficiency solar battery charger with embedded MPPT. The SPV1040 device is a low power, low voltage, monolithic step-up converter with an input voltage range from 0.3 V to 5.5 V, and is capable of maximizing the energy generated by even a single solar cell (or fuel cell), where low input voltage handling capability is extremely important.
Thanks to the embedded MPPT algorithm, even under varying environmental conditions (such as irradiation, dirt, temperature) the SPV1040 offers maximum efficiency in terms of power harvested from the cells and transferred to the output.
The device employs an input voltage regulation loop, which fixes the charging battery voltage via a resistor divider. The maximum output current is set with a current sense resistor according to charging current requirements.
The SPV1040 protects itself and other application devices by stopping the PWM switching if either the maximum current threshold (up to 2 A) is reached or the maximum temperature limit (up to 155 °C) is exceeded.
The STEVAL-ISV006V2 demonstration board is supplied by a PV panel with PPKof 200 mW, which can be replaced with PV panels with PPKup to 5 W (VOC < 5 V) depending on application requirements.
The output load is a 220 mF, 5.5 V super-capacitor that can be replaced with lead-acid, NiCd or NiMh rechargeable batteries (max voltage = 5 and > VOCof the selected PV panel).
The demonstration board provides a simple charge status indicator using 2 LEDs, and 3 trimmers are available to allow setup according to the specific application requirements. |
| Evaluation and Demonstration Boards and Kits | 1 | Active | The STEVAL-ISV012V1 demonstration board is based on the SPV1040 solar voltage boost converter and the L6924D single cell Li-ion battery charger.
The SPV1040 device is a high efficiency, low power, low voltage, monolithic step-up converter with an input voltage range from 0.3 V to 5.5 V, and is capable of maximizing the energy generated by even a single solar cell (or fuel cell), where low input voltage handling capability is extremely important.
Thanks to the embedded MPPT algorithm, even under varying environmental conditions (such as irradiation, dirt, temperature) the SPV1040 offers maximum efficiency in terms of power harvested from the cells and transferred to the output.
The SPV1040 protects itself and other application devices by stopping the PWM switching if either the maximum current threshold (up to 2 A) is reached or the maximum temperature limit (up to 155 °C) is exceeded.
The L6924D device is a fully monolithic battery charger dedicated to single cell Lithium-ion/Lithium-ion polymer battery packs. It is the ideal solution for space-limited applications such as PDAs, handheld equipment, cellular phones, and digital cameras.
The L6924D normally works as a linear charger when powered from an external voltage regulated adapter. The device can also work in "quasi-pulse" charger mode when powered from a current limited adapter like that of a solar panel. To work in this condition, the charging current of the device should be set to a level higher than the solar panel maximum peak current.
Thanks to the L6924D’s very low minimum input voltage (down to 2.5 V), during the fast-charge phase the output voltage of the solar panel drops down to the battery voltage plus the voltage drop across the power MOSFET of the charger.
The main advantage of the quasi-pulse charging mode is that it shares the simplicity of the linear approach, where the power dissipated is dramatically reduced, thereby maximizing the charge rate from the solar panel.
The Li-ion battery solar charger with embedded (MPPT) and quasi-pulse charging mode is "best-in-class" in terms of system efficiency, allowing battery charging while maximizing available solar panel power.
In the STEVAL-ISV012V1 demonstration board, the L6924D is supplied by the output stage of the SPV1040, which is supplied by a 400 mW PV panel. |
STEVAL-ISV019V1Evaluation board for SPV1050 ULP energy harvester and battery charger - boost configuration | Evaluation and Demonstration Boards and Kits | 1 | Active | The STEVAL-ISV019V1 is an evaluation board based on the ultralow power energy harvester and battery charger SPV1050. For any detail related to the SPV1050 features and performances please refer to the datasheet.
The evaluation board implements the boost configuration of the DC-DC converter and has the purpose of enhancing the SPV1050 based applications development by testing the silicon performance thanks to many jumpers and test points, and by helping to find out the best system configuration to make the SPV1050 device working at the most of efficiency.
The STEVAL-ISV019V1 is optimized to:
Harvest energy from PV panels supplying 0.5 V ≤ VMP≤ 2.5 V and 30 μA ≤ IMP≤ 20 mA.
Charge a battery with 3.7 V undervoltage protection threshold (VUVP) and 4.2 V end of charge voltage threshold (VEOC).
Nevertheless, few easy changes on the application components (input and output resistor partitioning, CINcapacitor) allow to use a different PV panel and source (like TEG), and a battery by setting the VMPP_SET, the VUVPand the VEOCthresholds according to the new source and load. More in detail, operating ranges can be extended as follows: VMPfrom 150 mV up to 5 V, IMPup to 100 mA, VUVPdown to 2.2 V and VEOCup to 5.3 V. |
STEVAL-L3751V1275 V 15 A DC-DC converter buck regulator evaluation board with L3751 controller | Evaluation Boards | 1 | Active | The 6 to 75 V wide input voltage range STEVAL-L3751V12 synchronous buck evaluation board features an extreme voltage conversion ratio over switching frequency.
The board provides a regulated 5 V output at 230 kHz switching frequency. The output voltage can be easily set to 12 V using a jumper connector. Different voltage output can be selected by changing a resistor to a lower VINrange.
The STEVAL-L3751V12 is a 100 W demo board. The default maximum current is set to 15 A. It can be easily selected by changing a resistor.
The evaluation board is based on the L3751 synchronous buck controller, which implements the voltage mode in a VQFN package.
The diode emulation (DEM) implements the pulse-skipping mode, which maximizes the efficiency at light-load with a controlled output voltage ripple.
The forced PWM (FPWM) over-the-load range makes the switching frequency constant and minimizes the output voltage ripple.
The power good open collector output validates the regulated output voltage for monitoring. It implements the output voltage sequencing for digital ICs during the power-up phase.
The embedded gate driver is designed for standard Vth MOSFET and minimizes the number of external components.
The embedded protections, such as the output overcurrent, the input voltage UVLO, the internal voltage monitoring, and the thermal shutdown at 150°C degrees, feature a controlled and safe operation for critical environments in telecom, networking, and industrial applications.
You can use the eDesignSuite software tool to configure the L3751 buck converter and satisfy the application requirements. |
STEVAL-L6981CDR38 V, 1.5 A synchronous step-down switching regulator evaluation board based on the L6981CDR for industrial power systems | Development Boards, Kits, Programmers | 1 | Active | The STEVAL-L6981CDR evaluation board is based on the L6981CDR synchronous monolithic step-down regulator capable of delivering up to 1.5 A DC.
Its wide input voltage range makes the device suitable for a broad range of applications.
The device implements peak current mode architecture in an SO 8L package with internal compensation to minimize design complexity and size.
The L6981 is available in low consumption mode (LCM) and low noise mode (LNM) versions.
LCM maximizes efficiency at light load with controlled output voltage ripple, making the device extremely suitable for battery-powered applications.
LNM makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the specification for noise sensitive applications.
The EN pin manages the enable/disable function. The typical shutdown current is 2 μA when disabled. When the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place.
Pulse-by-pulse current sensing on both power elements implements effective constant current protection while thermal shutdown prevents thermal run-away. |
