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Primarion VR Chipset

Up to 2 MHz switching 1 to 6 phases Reduced output cap 100A, 1000A/us with 500uF MLCC Current sense calibration Built-in cal on startup Digital temperature compensation I2C interface Monitor I,V, T, faults Real-time voltage control Use with discrete or integrated power stage

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Primarion VR Chipset

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  1. Up to 2 MHz switching 1 to 6 phases Reduced output cap 100A, 1000A/us with 500uF MLCC Current sense calibration Built-in cal on startup Digital temperature compensation I2C interface Monitor I,V, T, faults Real-time voltage control Use with discrete or integrated power stage +3.3V supply, QFN package 30A Power Stage Integrated control FET and drivers Integrated current and temp sensor Discrete sync FET Customize for each application CSP package Lead or lead-free available Primarion VR Chipset PX3538/9 Digital Controllers PX3520 Integrated Power Stage PX3511 Driver • High performance FET Driver • 3.3V Logic compatible • “A” Version: • Variable low-side drive • “B” Version: • Variable low and high-side driver

  2. PX3538 6-phase ControllerBlock Diagram • Integrated voltage and current digitizers • Programmable digital control loop • Programmable fault settings • Integrated non-volatile memory

  3. PX3525 Integrated Power Stage • Integrated high and low-side current sensor • Process and temp insensitive • Pulse-by-pulse OCP • Integrated temp sensor • Low RDSon FETs • 15 mOhm high-side • 2 mOhm low-side • 30A per phase • 20% duty factor • CSP package

  4. VR11 Applications 0.8 to 1.6V 1200A/us 6-phase digital controller Self calibrating current sense Low output cap technology I2C bus for monitoring & control Discrete drivers and FETs Low Cost VR Solutions Discrete 2U VRM solution 82% Efficiency at 1.25V & 130A

  5. VR11 Applications 0.8 to 1.6V 1200A/us 6-phase digital controller Self calibrating current sense Low output cap technology I2C bus for monitoring & control Integrated Power Stage & FET High Current Density VR Solutions Integrated VRD Solution 87% Efficiency at 1.2V & 130A Integrated 1U VRM solution 84% Efficiency at 1.25V & 130A

  6. Easy to use GUI Runs on any PC with USB interface Configure system parameters Monitor telemetry and faults Fine tune feedback loop and set fault trip thresholds VR Power Code User Interface

  7. PX3542 Graphics Controller Features • 4- to 6-phase operation • Maximum current: 150A • Output voltage: 0.5V - 1.6V • Switching frequency: 100 kHz to 2 MHz • Internal high precision voltage reference • 10mV voltage setpoint accuracy • Startup and maximum voltages set through external resistor (tamper resistant) • 2-bit VID input for final voltage set • Programmed in NVM, vmax resistor limits max output • “Plug and play” extra phases • Driver detect prior to soft-start disables unpopulated phases • Phase dropping based on current balance

  8. PX3542 Graphics Controller Features • Programmable current balance offset (+/- 10%) for thermal balancing • Digitally programmable loadline and loop compensation • Digital temperature sensor compensation • Active Transient Response (ATR) enables meeting transient requirements with reduced output capacitance • I2C-bus interface for monitoring, control and configuration • Current & Voltage readout • Query “Fault” details (out of balance channel etc.) • Internal NVM to store custom configurations with eight programmable active voltage position (AVP) system configurations • RoHS compliant 48-ld QFN package

  9. PX3542 Fault Detection Capability • Extensive fault detection capability with two user configurable output fault pins • Input Under-voltage • Output Under-/Over-voltage • Per Phase and Total Output Current • Current balance • Auxiliary 12V supply • (both fault and return reported) • Multiple Internal and External Temperature Limits

  10. +12V aux +12V main +12V (+5V opt) PX3511 UGATE PHASE 1 8 2 7 BOOT PVCC ` 3 6 PWM VCC 4 5 GND LGATE m 4.7 F V12_AUX1 V12_SEN PX3511 UGATE PHASE V12_AUX2 GND 1 8 PX3542 2 7 PWM1 BOOT PVCC +3.3V VDD IS1P 3 6 PWM VCC 4 5 IS1N GND LGATE m 4.7 F PWM2 VSTART IS2P VCC VMAX IS2N PX3511 UGATE PHASE PWM3 1 8 2 7 VIDEN_N IS3P BOOT PVCC From VID1 IS3N 3 6 PWM VCC GPU 4 5 VID0 PWM4 GND LGATE m 4.7 F OUTEN IS4P RTN IS4N To VR_READY PWM5 GPU PX3511 UGATE PHASE IS5P 1 8 Fault 2 7 FAULT1 IS5N BOOT PVCC Outputs 3 6 FAULT2 PWM6 PWM VCC 4 5 IS6P GND LGATE m 4.7 F SDA IS6N SCL TEMP_SEN RTHERM I2C I/F SADDR1 VSENP SADDR0 VSENN PX3542 Graphics Application Example

  11. High End Graphics Applications 0.5V to 1.6V up to 2MHz switching freq 150A max 6-phase digital controller Self calibrating current sense Low output cap technology I2C bus for monitoring & control Auto driver detect Auto current balance phase drop Discrete drivers and FETs Low Cost Graphics Solutions Discrete VRD solution 84% Efficiency at 1.25V & 130A

  12. GPU Power Code User Interface • Easy to use GUI • Runs on any PC with USB interface • Configure system parameters • Monitor telemetry and faults • Fine tune feedback loop and set fault trip thresholds

  13. Di-POLTM PX7510 Block Diagram

  14. Di-POLTM PX7510 Application ExampleSingle-Phase POL Converter

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