Power management and switching

STMicroelectronics

The EVLVIPGAN100PD from STMicroelectronics is a 100 W USB Power Delivery (PD) 3.0 reference design for a USB Type-C® power adapter. 

It is an isolated power supply with a stand-alone USB PD controller. The evaluation board implements, at the primary side, a quasi-resonant flyback converter based on the ST VIPERGAN100, high-voltage flyback converter with optocoupler feedback for voltage regulation and a high-voltage gallium nitride (GaN) power switch. 

The converter combines a high-performance, low-voltage PWM controller chip with a 650 V start-up cell in a single package. The reference design achieves low standby power consumption thanks to the VIPERGAN100’s advanced power management and low quiescent current. 

To reduce the input mains current distortion, a power factor correction circuit based on the L6564 controller IC is used. At the secondary side, to increase system efficiency, rectification is based on the SRK1001 adaptive synchronous rectification controller.

The reference design also includes an STUSB4761 controller, which offers the benefits of a full hardware USB PD stack, allowing for robust, deterministic, and safe negotiation in line with USB PD standards.

STMicroelectronics

The STEVAL-A6983CV1 from STMicroelectronics is an evaluation board for testing the performance of the A6983C automotive-grade synchronous monolithic step-down regulators. The A6983C regulators are optimized for low power consumption in light-load mode.  

STMicroelectronics

The EVLSTGAP3S6S is a half-bridge evaluation board for evaluating the STGAP3S6S isolated single gate driver from STMicroelectronics.

The STGAP3S6S features a maximum 6 A current capability, rail-to-rail outputs, and optimized under-voltage lockout and desaturation protection thresholds for silicon carbide (SiC) MOSFETS. It is ideal for use in high-power industrial motor drivers.

The gate driver has a single Output pin and a driver line for an external Miller clamp N-channel MOSFET: this optimizes the suppression of positive and negative gate spikes during fast commutations in half-bridge topologies.

Device protection features are connected to the recommended network on the board and can be easily evaluated through the board test points. Dual Input pins allow the selection of signal-polarity control and hardware interlocking protection to avoid cross-conduction in case of controller malfunction.

The gate driver allows negative gate driving, and the onboard isolated dc-dc converters provide an optimized drive voltage for SiC MOSFETs.

Renesas

The RTK-251-SinkCharger-RAA489118 from Renesas is a single-port reference design for implementing battery systems with from two to seven lithium-ion battery cells connected in series. It supports two modes: in one, power is supplied solely from the USB Type-C® port; in the other, it enables a power bank function in combination with a li-ion battery with a battery management system (BMS).

Due to losses in the cable, onboard charger, and board, the USB Power Delivery (PD) controller requires appropriate USB Type-C input levels from the USB Type-C source device to operate the battery system effectively. Switches on this evaluation board allow the selection of the number of batteries in series and the charging current.

The firmware for this evaluation board is generated using an instruction tool called VIDWriter.

STMicroelectronics

STMicroelectronics has implemented a simple and innovative ac-dc front-end circuit which enables the designer to perform inrush current limitation in any converter that has an input rectifier bridge topology.

STMicroelectronics

The X-NUCLEO-DRP1M1 expansion board from STMicroelectronics enables designers to evaluate the features of the TCPP03-M20 USB Type-C® Power Delivery (PD) controller, including the ability to protect the bus- and supply-voltage lines in dual-role power (DRP) applications.

The expansion board can be stacked on top of any STM32 Nucleo-64 board which has a USB PD peripheral embedded in its microcontroller.

The X-NUCLEO-DRP1M1 demonstrates dead battery and sink operations, an integrated ST715PU33R linear regulator supplies the associated STM32 Nucleo development board. It also performs USB Type-C source operations when a compatible external source is connected to the board. In addition, the board supports dual role data functionality for sourcing devices.

The X-NUCLEO-DRP1M1 complies with the USB Type-C and USB PD 3.1 specifications for the standard power range, and is USB-IF certified as a 100 W DRP solution supporting a programmable power supply.

The companion X-CUBE-TCPP software package contains application examples for NUCLEO-G071RB and NUCLEO-G474RE development boards. These can be ported to other development boards that have USB Type-C PD-enabled MCUs.

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