STEVAL-ISA191V15 V - 12 V, 15 W double output isolated flyback converter based on VIPer37LE | Evaluation Boards | 1 | Active | The STEVAL-ISA191V1 evaluation board implements an isolated flyback double output (5 V / 1.2 A and 12 V / 0.75 A) 15 W wide range mains developed for general purpose applications.
The core of the application is the VIPer37LE, a new Off-line high Voltage Converter from the VIPerPlus family. The device is a high-voltage converter that intelligently integrates an 800 V rugged power MOSFET with PWM current-mode control.
The evaluation board features a small size, minimal BOM, high efficiency and low standby consumption. Extremely low consumption under no-load conditions is ensured thanks to burst mode operation that reduces the average switching frequency and minimizes all frequency related losses.
VIPer37LE operates at 60 kHz fixed frequency. Frequency jittering is implemented to help meet electromagnetic disturbance standards, and the device implements several protections, including overvoltage, overload, output short circuit, secondary winding short, hard transformer saturation protection and brown out protection, for improved design safety and reliability. |
STEVAL-ISA192V17 W dual output flyback converter with standby managed by capacitive touch using VIPer0P and STM32L | DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards | 1 | Active | This offline converter key feature is the zero power mode (ZPM), an idle state during which the device is totally shut down. The IC enters ZPM by pulling the OFF pin to SGND for more than 10 ms and exits ZPM (resuming normal switching) by pulling the ON pin to SGND for more than 20 μs. This function can be tested via the tactile switches connected to the ON and OFF pins.
In ZPM the mains power consumption at 230 VACcan be below 5 mW; the STEVAL-ISA192V1 evaluation board consumption is 30 mW due to the MCU polling strategy implemented at firmware level.
The board has a dual output (i.e., - 5 V and + 7 V based on flyback topology). The negative output is obtained by just connecting EAGND to the negative rail and a voltage divider among FB, EAGND and SGND. The positive output derives from the turn ratio of the transformer secondary windings.
To achieve extremely low input power consumption, the IC is biased through a diode coming from the + 7 V, which maintains the VCCvoltage high enough (> 4.5 V) to prevent the internal HV current source activation.
The STEVAL-ISA192V1 is equipped with the STM32L0 microcontroller which detects tactile push buttons and capacitive touch interface. The STM32L0 core manages VIPer0P to achieve minimum power consumption in ZPM, while supplying the microcontroller and user interface (capacitive touch and push button) and still maintaining the overall efficiency quite high in standard operation mode. |
| Development Boards, Kits, Programmers | 1 | Active | The STEVAL-ISA195V1 evaluation board implements a wide range mains buck converter (5 V/0.36 A) developed for general purpose applications.
The design is built around the VIPer11 off-line high voltage converter from the VIPerPlus family, which intelligently integrates an 800 V rugged power MOSFET with a current-mode control PWM.
The main characteristics of the evaluation board are its single layer, small size and minimal BoM, high efficiency and low standby consumption. |
STEVAL-ISA200V1High efficiency synchronous step-down regulator based on the A6984 | Evaluation Boards | 1 | Active | The STEVAL-ISA200V1 product evaluation board is based on the A6984 high-efficiency monolithic synchronous step-down regulator, capable of delivering up to 400 mA of DC current. The fixed 3.3 V output requires no external resistor divider. The A6984 is especially suited for automotive systems. The low consumption mode (LCM) is designed for automotive applications that remain active while the car is parked, maximizing efficiency at light load with controlled output voltage ripple. The low noise mode (LNM) renders the switching frequency nearly constant over the load current range, serving low noise application specifications such as audio and sensors. The PGOOD open collector output can implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium-heavy load, and the high switching frequency capability ensure a compact application size. Pulse-by-pulse current sensing on the low-side power element implements effective constant current protection. |
STEVAL-ISA205V138 V, 2 A synchronous step-down switching regulator evaluation board based on the A6986H | DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards | 1 | Active | The STEVAL-ISA205V1 product evaluation board is based on the synchronous step-down switching regulator A6986H that can deliver up to 2 A and withstand cold cranking across 100% duty cycle, which, along with its wide input operating voltage range, render the A6986H the ideal choice for battery powered automotive systems.
Synchronous rectification helps to achieve higher efficiency at full load as well as application compactness, while high-frequency switching (programmable up to 2 MHz) helps to cut power passive costs and size, while staying outside of the AM band.
The device can operate in a Low Consumption Mode (LCM) with a quiescent current down to 30 µA at VIN= 12 V and VOUT= 3.3 V, hence assuring high efficiency at light loads, as required in typical car body applications that are active during car parking.
A Low Noise Mode (LNM) is also available to meet the requirements of infotainment applications of forced PWM mode in all loading conditions.
The default configuration of the board is output voltage set to 3.3 V configured in LCM, 500 kHz switching frequency, ISKIPcurrent set to high level and the switchover feature disabled. All of these settings can be easily changed by the user to evaluate different application scenarios. |
STEVAL-ISA206V138 V, 2 A synchronous step-down switching regulator evaluation board based on L6986H | Development Boards, Kits, Programmers | 1 | Active | The STEVAL-ISA206V1 product evaluation board is based on the L6986H synchronous step-down switching regulator that can deliver up to 2 A and withstand cold cranking across 100% duty cycle, which, along with its wide input operating voltage range, render the L6986H the ideal choice for 12 V - 24 V industrial standard Bus.
Synchronous rectification helps to achieve higher efficiency at full load as well as application compactness, while high-frequency switching (programmable up to 2 MHz) helps to cut on power passive costs and size while staying outside of the AM band.
The device can operate in a low consumption mode (LCM) with a quiescent current down to 30 µA at VIN= 12 V and VOUT= 3.3 V, hence assuring high efficiency at light loads, as required by typical car body applications that active during car parking.
A low noise mode (LNM) is also available to meet the requirements of infotainment applications of forced PWM mode in all loading conditions.
The default configuration of the board is output voltage set to 3.3 V configured in LCM, 500 kHz switching frequency, ISKIPcurrent set to high level and the switchover feature disabled. All of these configurations can be easily changed by the user to evaluate different application scenarios. |
STEVAL-ISA209V138 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR | DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards | 1 | Active | The L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load, and the wide input voltage range makes the device suitable for a broad range of applications. The L6983NQTR used in this evaluation board is based on peak current mode architecture and is packaged in a QFN16 3x3 with internal compensation, thus minimizing design complexity and size.
The L6983 is available in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple, which is ideal for battery-powered applications. LNM sets the switching frequency and minimizes the output voltage ripple overload current range, meeting the specification for low noise sensitive applications.
The L6983 allows a 200 Hz - 2.2 MHz switching frequency range with optional spread spectrum for improved EMC. The EN pin provides an enable/disable function, and the typical shutdown current is 2 μA when disabled. As soon as the EN pin is pulled up, the device is enabled and an internal 1.3 ms soft-start sequence is triggered.
The device also features a Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements effective constant current protection and thermal shutdown prevents thermal run-away. |
STEVAL-ISB009V1Li-Ion battery monitoring and gas gauge evaluation board based on STC3100 | Evaluation Boards | 1 | Obsolete | The STEVAL-ISB009V1 demonstration board, based on the STC3100, is able to monitor the critical parameters of a single-cell Li-Ion battery (voltage, temperature, and current) and includes hardware functions to implement a gas-gauge for battery charge monitoring, based on a programmable 12-bit to 14-bit A/D converter.
The battery current can be up to 2.5 A and the accumulator system provides a capacity up to +/-7000 mAh with a resolution of 0.2 mAh.
The device is programmable through an I2C interface. |
STEVAL-ISB013V1Battery monitor demonstration board with alarm output for gas gauge applications based on the STC3105 | Evaluation Boards | 1 | Obsolete | The STEVAL-ISB013V1 is a demonstration board based on the STC3105 battery monitor IC. The application monitors the voltage and current of a battery and includes a Coulomb counter to keep track of the charge/discharge status.
An alarm output signals a low state-of-charge (SOC) condition and/or low battery voltage. In addition, a relaxation register begins counting when the gas gauge is in a specified light-load condition, indicating when an OCV (open circuit voltage) measurement should be made for SOC correction. |
STEVAL-ISB014V2Battery monitoring with alarm output for gas gauge applications based on the STC3115 | Evaluation and Demonstration Boards and Kits | 1 | Active | The STEVAL-ISB014V2 product evaluation board is based on the STC3115. This device includes the hardware functions required to implement a low-cost gas gauge for battery monitoring. It uses current sensing, Coulomb counting and accurate battery voltage measurements to estimate the state-of-charge (SOC) of the battery. An internal temperature sensor simplifies implementation of temperature compensation.
An alarm output signals a low SOC condition and can also indicate low battery voltage. The alarm threshold levels are programmable.
The STC3115 offers advanced features to ensure high performance gas measurement in all application conditions.
The STEVAL-ISB014V2 evaluation board is suitable for portable medical equipment, mobile phones, multimedia players and digital cameras. |
