EVLSRK1001SRK1001 adaptive synchronous rectification controller for flyback converter demonstration board with SR MOSFET | Development Boards, Kits, Programmers | 2 | Active | The EVLSRK1001-PF is a demonstration board, designed for evaluation of the SRK1001 synchronous rectification controller. The SRK1001 implements a control scheme specific for secondary-side synchronous rectification in flyback converters and provides high-current gate-drive outputs for driving N-channel Power MOSFET. The device can operate both in quasi-resonant (QR) applications and in fixed frequency (FF) mixed DCM-CCM applications. The board is provided with a setting suitable for QR application. To use in FF applications, a 100pF capacitor needs to be added in C3. A 120 kΩ resistor (R3) is provided on the TON pin that fixes the blanking after the turn-on to about 1.44 µs. The blanking time after turn-off is set to 3 μs through a 100 kΩ resistor (R4) on TOFF pin. In order to use the DIS/SYNC pin functionality, the user has to remove the zero ohm resistor R9: the PCB already provides a NPN transistor connected to this pin for remote ON/OFF. The board includes the SR MOSFET (PowFLAT 5 x 6 package) and can be easily implemented into an existing converter to substitute rectifier diodes. |
EVLSTCH0336W USB charger with selectable output voltage (5-9-12 V @3A) based on STCH03L and SRK1000B | Development Boards, Kits, Programmers | 2 | Active | The EVLSTCH03-45WPD 45W USB Type-C®Power Delivery 3.0 adapter is a USB-IF certified solution and reference design. The EVLSTCH03-45WPD is an isolated power supply with a standalone USB PD controller. The evaluation board implements at the primary side a quasi-resonant flyback converter based on the STCH03 controller with optocoupler feedback for voltage regulation. This controller combines a high performance low-voltage PWM controller chip with a 650 V HV start-up cell in the same package. The STCH03 controller drives the gate of the new 650 V MDmesh™ M6 technology Power MOSFET STD7N65M6.
At the secondary side, to increase the system efficiency, the rectification is based on the SRK1001 adaptive synchronous rectification controller. This controller drives the gate of the 100V STripFET™ F7 technology Power MOSFET STL110N10F7.
Always on the secondary side the CC/CV regulation loop to drive the power regulation stage and the USB Type-C®PD interface are based on the STUSB4761 controller. This controller offers the benefits of a full hardware USB PD stack allowing robust, deterministic and safe negotiation in line with USB PD standard.
The EVLSTCH03-45WPD is protected against destructive electrostatic discharge from the USB Type-C®connector using a Dual Transil array for ESD protection ESDA25L.
The evaluation board implements a robust adapter protected for output overvoltage, output undervoltage, output overpower and output short-circuit.This reference design, based on STMicroelectronics semiconductors, helps designers to develop adapters with a short bill of materials in order to obtain a cost-effective and fast design. |
EVLSTNRG-170W170W SMPS with digitally controlled PFC and resonant LLC stage using STNRG388A | Evaluation and Demonstration Boards and Kits | 1 | Active | The EVLSTNRG-170W evaluation board is intended for evaluating the STNRG388A digital controller in off-line power conversion applications such as digital industrial power supplies.
The solution implements a PFC stage followed by a resonant LLC stage supporting up to 170 W. The application supports multiple output rails: a high power 24 V (6 A) channel for the main application, 1 auxiliary 12 V (2 A) for the controller and an always-on 5 V (2 A) standby.
The STNRG388A power conversion dedicated peripherals (SMEDs) offer the flexibility to drive the PFC in transition mode (DCM-CCM boundary) while the resonant LLC is controlled with timeshift control (TSC). In parallel to managing the two conversion stages, STNRG388A guarantees all the protections required by the application as well as implementing the advanced Anti Capacitive protection.
Thanks to the digital core of STNRG388A, it is also possible to monitor, control and debug the EVLSTNRG-170W board via a convenient HyperTerminal control. |
EVLSTNRG01112 V, 150 W power supply based on STNRG011 digital combo and SRK2001 adaptive synchronous rectifier controller | Development Boards, Kits, Programmers | 1 | Active | The EVLSTNRG011-150 is a 12 V, 150 W power supply demonstration board for 90 V ac to 264 V ac mains, which is representative of an AC/DC converter for an all in one (AIO) computer or a general purpose high power adapter.
The design is based on the STNRG011 IC, a digital combo that controls a two-stage AC/DC SMPL. The front-end is a transition mode PFC pre-regulator and the second stage is an LLC HB resonant converter. The SRK2001 implements the synchronous rectification in order to obtain higher efficiency.
No auxiliary supply is needed due to the very low consumption at no load.
A full set of auxiliary functions and protection is also provided, this allows reduction of the overall BOM while maintaining a rugged design.
The performances of the EVLSTNRG011-150 can meet the requirements of major standards ENERGY STAR® for computers ver. 6.1, EuP Lot 6Tier 2, European CoC ver. 5 Tier-2, in terms of efficiency, no-load input power and power factor and feature harmonics content well below the limits of European Standard EN61000-3-2 Class- D and Japanese standard JEITA-MITI Class-D regulations. |
| Evaluation Boards | 1 | Obsolete | |
| Evaluation Boards | 1 | Obsolete | |
EVLVIPGAN100PD100W USB Power Delivery reference design based on VIPERGAN100 | Evaluation and Demonstration Boards and Kits | 1 | Active | The EVLVIPGAN100PD is a 100 W USB Type-C® power delivery 3.0 adapter reference design. It is an isolated power supply with a standalone USB PD controller. The evaluation board implements, at the primary side, a quasi-resonant flyback converter based on STMicroelectronics' VIPerGaN® high-voltage converter VIPERGAN100 with optocoupler feedback for voltage regulation. This controller combines a high performance low-voltage PWM controller chip with a 650 V startup cell in the same package. The advanced power management with the low quiescent helps to achieve low standby consumptions.
To reduce the input mains current distortion, thus providing IDE range mains operation with an extremely low THD, a PFC based on the L6564 is used.
At the secondary side, to increase the system efficiency, the rectification is based on the SRK1001 adaptive synchronous rectification controller.
Always on the secondary side the CC/CV regulation loop to drive the power regulation stage and the USB Type-C® PD interface is based on the STUSB4761 controller. This controller offers the benefits of a full hardware USB PD stack allowing robust, deterministic, and safe negotiation in line with USB PD standards.
The evaluation board implements a robust adapter protected for output overvoltage, output undervoltage, output overpower, and output short-circuit. This reference design helps designers to develop adapters with a short bill of materials in order to obtain a cost-effective and fast design. |
EVLVIPGAN50FL15 V / 50 W QR flyback converter based on VIPERGAN50 | Evaluation Boards | 1 | Active | The EVLVIPGAN50FL evaluation board implements a 15 V-50 W SSR isolated flyback converter developed for general purpose application, operating from 90 to 265 VAC.
The reference design is built around the VIPERGAN50, a new advanced offline high-voltage converter by STMicroelectronics, having the following features:
- 650 V PowerGaN with embedded senseFET (Si) and HV startup;
- QR operation with dynamic blanking time and adjustable valley synchronization delay functions, to maximize efficiency at any input line and load condition;
- Valley-lock to ensure constant valley skipping;
- Input voltage feedforward compensation for mains-independent OPP intervention;
- Adaptive burst mode for advanced power management in light load conditions;
- Frequency jittering for EMI suppression.
Enhanced system reliability is ensured by the built-in soft-start function and by the following set of protections:
- Input OVP (settable);
- Brown-in and brown-out (settable);
- Output OVP (settable);
- Output overload;
- OCP LEB;
- Embedded thermal shutdown.
The EVLVIPGAN50FL is composed of a main board and a daughterboard, whose schematics are shown in Figure 1 and Figure 2 respectively.
The main board contains, on the primary side, a diode bridge for double wave rectification, an input pi filter for EMI, a flyback transformer, the VIPERGAN50 and all the related components needed for polarization and features setting; on the secondary side, the output capacitors and the output rectifier, realized by a Power MOSFET driven by a synchronous rectifier for efficiency optimization. |
EVLVIPGAN50PD45W QR USB PD adaptor reference design based on VIPerGaN50 and STUSB4761 | Evaluation and Demonstration Boards and Kits | 1 | Active | The EVLVIPGAN50PD 45 W USB Type-C®Power Delivery 3.0 adapter is a USBPD reference design solution. It is an isolated power supply based on the VIPERGAN50, a new offline high-voltage converter from the VIPerPlus family with a 650 V HEMT Power GaN transistor, designed for quasi-resonant flyback converters, capable of providing an output power up to 50 W in wide range.
At the secondary side, to increase the system efficiency, the rectification is based on the SRK1001 adaptive synchronous rectification controller.
Still on the secondary side, the CC/CV regulation loop to drive the power regulation stage and the USB Type-C® PD interface is based on the STUSB4761 controller. This controller offers the benefits of a full hardware USB PD stack allowing robust, deterministic and safe negotiation in line with USB PD standard.
The evaluation board implements a robust adapter protected for output overvoltage, output undervoltage, output over power and output short-circuit. This reference design, based on STMicroelectronics semiconductors, helps designers to develop adapters with a short bill of materials to obtain a cost-effective and fast design. |
EVLVIPGAN65PD65 W USB Type-C Power Delivery reference design based on VIPERGAN65 and STUSB4761 | Development Boards, Kits, Programmers | 1 | Active | The EVLVIPGAN65PD is a 65 W USB Type-C® Power Delivery 3.0 adapter reference design. It is an isolated power supply with a standalone USB PD controller. The evaluation board implements at the primary side a quasi-resonant flyback converter based on the VIPERGAN65 HV converter with optocoupler feedback for voltage regulation. This controller combines a high performance low-voltage PWM controller chip with a 650 V HV startup cell in the same package. The advanced power management with the low quiescent helps to achieve low standby consumptions.
At the secondary side, to increase the system efficiency, the rectification is based on the SRK1001 adaptive synchronous rectification controller.
Also on the secondary side, the CC/CV regulation loop to drive the power regulation stage and the USB Type-C®PD interface is based on the STUSB4761 controller. This controller offers the benefits of a full hardware USB PD stack allowing robust, deterministic, and safe negotiation in line with USB PD standards.
The evaluation board implements a robust adapter protected for output overvoltage, output undervoltage, output over power and output short-circuit. This reference design, based on STMicroelectronics semiconductors, helps designers to develop adapters with a short bill of materials in order to obtain a cost-effective and fast design. |
