ST STNRGPF12

The STNRGPF02/12 embed the Inrush Current Limiter function. STNRGPF12 features a digital inrush current control generating two PWM’s signals in order to drives the input semi-controlled bridge. STNRGPF02 embeds inrush current control function setting high a signal that is used to short a resistive element. The STNRGPFx2 are digital controllers designed specifically for interleaved CCM boost PFC topologies in high power applications and embed the Inrush current limiter function. The Interleaving technique splits the PFC management into two or more parallel channels depending on the load condition. The driving signal will be out of phase of a proper value. The benefits of the interleaved topology, compared to traditional single stage PFC, are measured in terms of reduction of EMI filter and inductor volume, and a reduction of rms capacitor current. The STNRGPFx2 contain all the control functions for designing a high efficiency-mode power supply with sinusoidal line current consumption. They work in CCM, fixed frequency with average current mode control, implementing a mixed signal (analog/ digital) control joining the advantages of very high-end digital solution without typical limits of analog ones. In the mixed signal approach, the inner current loop is performed in hardware realizing an analog ProportionalIntegral (PI) compensator, and the outer voltage loop is performed by a digital PI controller with fast dynamic response. The STNRGPFx2 can be configured by a dedicated software tool (eDesignSuite) in order to be customized for a specific application. The binary code can be downloaded into the STNRGPF x2 through the programming software STSWSTNRGPF01 (by means serial interface) having a customized device that can be used like analog device ready to use in application. The STNRGPFx2 devices have the Inrush Current Limiter function embedded. As soon as power supplies are connected to AC line, they are subject to short-duration, high amplitude, input current called “Inrush Current”. The inrush current continues until the voltage across the internal capacitors reaches approximately the peak amplitude of the input AC line. If uncontrolled, the inrush current can damage the components of the power supply. Several solutions can be adopted to limit this current and STNRGPF x2 devices are able to manage two control methods.

• Embedded digital inrush current limiter function
• Interleaved PFC digital controller
• Two interleaved channels PFC
• Continuous conduction mode
• Fixed frequency operation
• Average current mode control
• Mixed signal architecture
• Soft start-up management
• Burst mode support
• Load feed forward
• Input voltage feed forward
• Channel current balance function
• Programmable phase shedding
• Status indicator signaling for cooling system, PFC Fault and PFC OK
• Configurable driver by means of dedicated graphic tool
• Programmable fast overcurrent and thermal protection
• Serial communication port available for: Device programming; Monitoring of the PFC parameters
• Customizable firmware
• Configuration via eDesign suite
• Embedded memory Program memory: 32 Kbytes flash Data retention 15 years at 85 ℃ after 10 kcycles at 25 ℃ Data memory: 1 Kbyte true data E2PROM; data retention: 15 years at 85 ℃ after 100 kcycles at 85 ℃ Flash and E2PROM with read while write (RWW) and error correction code (ECC) RAM: 6 Kbytes
• Communication interfaces UART asynchronous protocol for bootloader support and monitoring of the PFC parameters
• Operating temperature: -40 ℃ up to 105 ℃

• Welding
• air conditioner
• Industrial motors
• UPS
• chargers
• high power systems