PowerXR Programmable Power Technology
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To introduce PowerXR digital power solution and its key features
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PowerXR Programmable Power Technology
- 6. Power XR Architecture
- 9. Power XR Product Family Part Number Channels Output Current Operating Voltage Output Voltage (Min) Frequency Package XRP7713 3 3 x 5A 4.75V - 25V 0.9V Prog. 0.3MHz to 1.5MHz TQFN-32 XRP7714 4 4 x 5A 4.75V - 25V 0.9V Prog. 0.3MHz to 1.5MHz TQFN-40 XRP7704 4 4 x 5A 6.5V - 20V 0.9V Prog. 0.3MHz to 1.5MHz TQFN-40 XRP7708 4 2 x 5A 2 x 8A 6.5V - 20V 0.9V Prog. 0.3MHz to 1.5MHz TQFN-40 XRP7740 4 2 x 5A 2 x 15A 6.5V - 20V 0.9V Prog. 0.3MHz to 1.5MHz TQFN-40
Notes de l'éditeur
- Welcome to the training module on Power XR Programmable Power Technology.
- This training module will introduce Power XR digital power solution and its key features.
- Every electronic device requires a power delivery architecture, which involves supplying the right voltage and current to ICs in the system. The diagram illustrates a typical power delivery system. It consists of power management control chips, and power supply components such as power FETs and power inductors. However, today’s complex IC components, like FPGA, SoCs, media processors, and microcontrollers, have the need for multiple power supplies. Note that these voltage requirements aren’t necessarily fixed for a given design. Therefore, system designers need custom power supplies to handle the power needs of such components. In addition to the need for many more supply voltages, power and reset sequencing, and drift insensitivity, today’s system designs need far more precise and programmable control over the supply voltages.
- What’s now required is a field-programmable power supply or system (FPPS) that can provide multiple programmable supply voltages with independently adjustable ramp-up and ramp-down times and adjustable sequencing delays between the various supply voltages. Such a power subsystem design provides the system designer with the needed design flexibility. An FPPS provides the system design with a programmable power subsystem that adapts to any changes to or new requirements for the system’s power supply. An FPPS device supported with a software-based design tool makes it relatively simple to specify the desired supply voltages and get the required bill of materials (BOM) from the design tool. Further, because the power system is programmable, the power system’s outputs can be adjusted within a range of voltages with nothing more than a programming change to the FPPS controller. For some FPPS controller chips, a serial port allows an on-board microcontroller to adjust the supply voltages during system operation.
- EXar’s Power XR is an FPPS controller IC that provides all of the benefits of a field programmable power supply without increasing the cost of power supply design. Power XR ICs integrate the low cost and flexibility of digital power control as well as the robust power capabilities of high performance analog power switches. In addition to the programmable supply voltages, the Power XR devices can control the power-up and power-down characteristics of the voltage supplies. It can independently control the ramping speed for each of the four voltage channels and it can controls the relative timing between the supply voltages. This last characteristic allows the system designer to bring up some supply voltages before others, as required by many complex logic ICs such as FPGAs, media processors, ASICs, SOCs, and ASSPs.
- Here shows the simplified block diagram of Exar’s Power XR products. The Power XR has several digital pulse width modulation (DPWM) controller with integrated gate drivers for the use in synchronous buck switching regulators. Each digital controller provides a number of safety features, such as over-current protection (OCP) and over-voltage protection (OVP). The chip also provides over-temperature protection (OTP) and under-voltage lock-out (UVLO) for two input voltage rails. It also has up to 5 GPIOs and a Standby Linear Regulator to provide standby power. An I2C bus interface is provided to program the IC as well as to communicate with the host for fault reporting and handling, power rail monitoring, channel enable and disable, Standby LDO voltage reconfiguration, and Standby LDO enable and disable.
- The Power XR family offers a wide input voltage range, and output range (0.9V to 5.0V), with a built-in Low-Drop Out regulator (LDO) for standby power, power sequencing capability, and integrated gate drivers. These power system ICs contain multiple Digital Pulse Width Modulator (DPWM) ICs with an effective 12-bit resolution. The ICs contain an integrated LDO regulator that provides a fifth voltage supply, which can also be employed as a standby-voltage source and is fully configurable via an I²C interface for monitoring, control and management of DC/DC power conversion. The devices contain integrated gate drivers for the high-current outputs and up to six General Purpose Input/Output (GPIO) pins. The ICs use a digital PID (proportional, integral, differential) control algorithm that performs full-digital loop control at switching frequencies to 1.5 MHz.
- Power XR device reduces design effort by using simple GUI instead of changing hardware, reduces risk by enabling customer to repair/ upgrade power supply when already at end-customer location, and use common platform across multiple customer designs. The power SoC solution replaces cumbersome discrete solutions, thus reducing footprint and cost of passive components.
- The PowerXR family is comprised of five Pluse-Width Modulated (PWM) step-down DC-DC controllers with a built-in LDO for standby power and GPIOs. The XRP7704, XRP7708, XRP7713, XRP7714, and XRP7740 devices provide a complete power management solution in one IC and are fully programmable via the included I²C serial interface. Independent Digital Pulse-Width Modulator (DPWM) channels regulate output voltages and provide all required protection functions such as current limiting and over- voltage protection.
- PowerXR family offers an unprecedented level of programmability and flexibility for applications requiring up to 5Amps, 8 Amps or 15Amps. These applications include consumer electronics, computing devices, industrial equipment. Medical equipment, and networking and telecommunications equipment.
- Exar's Digital Power Studio enables designers to intelligently configure the power supply's voltage setting and current thresholds, fault monitoring and response, soft start and active shutdown timing, and channel sequencing, phase shift management, and loop response, amongst other features. You may download the latest DPS from Exar site to start and finish your design today. The design tool accelerates time to market from first meeting to production and enable wide range of design engineers to leverage their level of expertise for optimal design.
- Thank you for taking the time to view this presentation on “ Power XR P rogrammable Power Technology ” . If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link, or simply call our sales hotline. For more technical information you may either visit the EXAR site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit Element 14 e-community to post your questions.