STMicroelectronics

The SR5E1-EVBE7000P is the evaluation board of the SR5E1E7 Stellar E1 automotive MCU in a QFP176 package enabling the access to all the functionalities of the product. Being based on socket, it can be the best solution to start prototyping any automotive application, such as OBC, DCDC, motor control and many more. The board provides high-resolution timers, DAR, SAR-ADC and SD-ADC connectors to easily test control loop applications exploiting the efficiency of the Stellar E1 MCU. The board provides FDCAN channels, LIN, UART, I²C and SPI standard communication interface, as well as LED and buttons for user controls. ST’s StellarStudio, an Eclipse-based integrated development environment, provides a comprehensive framework to design, build, and deploy embedded applications. StellarStudio is available for free download from www.st.com and includes multiple free application examples ready to use on the SR5E1-EVBEx000P board.

The SR5E1E3, SR5E1E5, SR5E1E7 MCU family has been designed to meet the enhanced digital control and high-performance analog requirements requested by the new wide bandgap power technologies, silicon carbide and GAN, from power conversion applications such as on-board charger and DC/DC converters as well as advanced motor control like traction inverter applications. SR5E1E3, SR5E1E5, SR5E1E7 also offer superior real-time and safe performance with the highest ASIL-D capability, security cryptographic services (HSM) and high efficiency OTA reprogramming capability.

The SR5E1E3, SR5E1E5, SR5E1E7 MCU family has been designed to meet the enhanced digital control and high-performance analog requirements requested by the new wide bandgap power technologies, silicon carbide and GAN, from power conversion applications such as on-board charger and DC/DC converters as well as advanced motor control like traction inverter applications. SR5E1E3, SR5E1E5, SR5E1E7 also offer superior real-time and safe performance with the highest ASIL-D capability, security cryptographic services (HSM) and high efficiency OTA reprogramming capability.

The SR5E1E3, SR5E1E5, SR5E1E7 MCU family has been designed to meet the enhanced digital control and high-performance analog requirements requested by the new wide bandgap power technologies, silicon carbide and GAN, from power conversion applications such as on-board charger and DC/DC converters as well as advanced motor control like traction inverter applications. SR5E1E3, SR5E1E5, SR5E1E7 also offer superior real-time and safe performance with the highest ASIL-D capability, security cryptographic services (HSM) and high efficiency OTA reprogramming capability.

The SRC0 devices monitor the state of connected push-button(s) as well as sufficient supply voltage. An enable output controls power for the application through the MOSFET transistor, DC-DC converter, regulator, etc. If the supply voltage is above a precise voltage threshold, the enable output can be asserted by a simple press of the button. Factory-selectable supply voltage thresholds are determined by highly accurate and temperature-compensated references. An interrupt is asserted by pressing the push-button during normal operation and can be used to request a system power-down. The interrupt is also asserted if undervoltage is detected. By a long push of one button (PB) or two buttons (PBandSR) either a reset is asserted or power for the application is disabled depending on the option used. The device also offers additional features such as precise 1.5 V voltage reference with very tight accuracy of 1%, separate output indicating undervoltage detection and separate output for distinguishing between interrupt by push-button or undervoltage. The device consumes very low current of 6 μA during normal operation and only 0.6 μA current during standby. The SRC0 is available in the TDFN12 package and is offered in several options among features such as selectable threshold, hysteresis, timeouts, output types, etc.

SRK1000 / SRK1000A /SRK1000B are controllers intended for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. They provide a high-current gate-drive output, capable of driving N-channel Power MOSFETs. The control scheme of this IC is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode and it is then switched off as current approaches zero. The fast turn-on, with minimum delay, and the innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit. The device enters low consumption mode when it detects primary controller burst-mode operation, or when the SR MOSFET conduction becomes lower than the programmed minimum TON. In this way, converter efficiency improves at light load where synchronous rectification is no longer beneficial. After the converter restarts switching or the IC detects that the current conduction in the rectifiers has increased 20% above the min TONprogrammed value, the IC exits low consumption mode and resumes switching operation.

SRK1000 / SRK1000A /SRK1000B are controllers intended for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. They provide a high-current gate-drive output, capable of driving N-channel Power MOSFETs. The control scheme of this IC is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode and it is then switched off as current approaches zero. The fast turn-on, with minimum delay, and the innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit. The device enters low consumption mode when it detects primary controller burst-mode operation, or when the SR MOSFET conduction becomes lower than the programmed minimum TON. In this way, converter efficiency improves at light load where synchronous rectification is no longer beneficial. After the converter restarts switching or the IC detects that the current conduction in the rectifiers has increased 20% above the min TONprogrammed value, the IC exits low consumption mode and resumes switching operation.

The SRK1001 controller is designed for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. It provides a high-current gate-drive output capable of driving N-channel Power MOSFETs. The control scheme of this IC is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode, and then switched off as current approaches zero. The fast turn-on with minimum delay and innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit. The device enters low consumption mode when it detects primary controller burst-mode operation, or when the DIS pin is pulled up by the user, or when the SR MOSFET conduction falls below the programmed minimum TON. This improves the converter efficiency at light load, where synchronous rectification is no longer beneficial. After the converter restarts switching or the DIS pin goes low again and the IC detects that the current conduction in the rectifiers has increased 20% above the min TONprogrammed value, the IC exits low consumption mode and resumes switching operation.