primarion vr chipset
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2023.04.19 p. 1
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
• +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
PX3520Integrated 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
PX3538/9Digital Controllers
2023.04.19 p. 2
PX3538 6-phase Controller
Block Diagram
• Integrated voltage and current digitizers
• Programmable digital control loop
• Programmable fault settings
• Integrated non-volatile memory
2023.04.19 p. 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
PWM
ISENSE
VCC
VSW
TemperatureSense TEMP
HS ShortDetect
HSSVSW
Signal GND
Referenceand POR
PWM
I-senseandOCP
Logic andNon-overlap
Control
Driver
3.3V
PGND
Driver
Boot
VCC
I-Limit
2023.04.19 p. 5
Low Cost VR Solutions• 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
Discrete 2U VRM solution 82% Efficiency at 1.25V & 130A
2023.04.19 p. 6
High Current Density VR Solutions• 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
Integrated 1U VRM solution 84% Efficiency at 1.25V & 130A
Integrated VRD Solution87% Efficiency at 1.2V & 130A
2023.04.19 p. 7
VR 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
2023.04.19 p. 8
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
2023.04.19 p. 9
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
2023.04.19 p. 10
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
2023.04.19 p. 11
PX3542 Graphics Application Example
VCC
+12V main
+12V (+5V opt)
+3.3V
4.7F
8
7
5
6
1
2
4
3
PX3511
UGATE
BOOT
PWM
GND
PHASE
PVCC
VCC
LGATE
4.7F
8
7
5
6
1
2
4
3
PX3511
UGATE
BOOT
PWM
GND
PHASE
PVCC
VCC
LGATE
4.7F
8
7
5
6
1
2
4
3
PX3511
UGATE
BOOT
PWM
GND
PHASE
PVCC
VCC
LGATE
4.7F
8
7
5
6
1
2
4
3
PX3511
UGATE
BOOT
PWM
GND
PHASE
PVCC
VCC
LGATE
RTHERM
RTN
FromGPU
I2C I/F
ToGPU
FaultOutputs
PX3542
V12_SEN
GND
PWM1
IS1P
IS1N
PWM2
IS2P
IS2N
PWM3
IS3P
IS3N
PWM4
IS4P
IS4N
PWM5
IS5P
IS5N
PWM6
IS6P
IS6N
TEMP_SEN
VSENP
VSENN
V12_AUX1
V12_AUX2
VDD
VSTART
VMAX
VIDEN_N
VID1
VID0
OUTEN
VR_READY
FAULT1
FAULT2
SDA
SCL
SADDR1
SADDR0
`
+12V aux
2023.04.19 p. 12
Low Cost Graphics Solutions
• 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
Discrete VRD solution 84% Efficiency at 1.25V & 130A
2023.04.19 p. 13
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
2023.04.19 p. 14
Di-POLTM PX7510 Block Diagram
PID/PWMController
Current Sense
TempSense
Reference &
Oscillator
SMBusNon-Volatile Memory
(NVM)
Fault Handler
State Machine
IOUT/ISH
SMB_AL_N
SCLKSDATA
FSET
FAULT1
ADC
VSET
PWM
SADDR
VCC
PWRGD
MUX
OUTEN
TEMPSEN
ISENP
VSENNVSENP
ISENN
V12SEN
Voltage Sense
SYNC_IN
VTRIM
IMAXSET
DAC
FAULT2
SYNC_OUT
ISH_GND
2023.04.19 p. 15
Di-POLTM PX7510 Application ExampleSingle-Phase POL Converter
VOUT
RTN
PMBus I/F
PowerManagement
I/F
FaultOutputs
+5V
PX7510
VCC
GND
PWM
ISENN
ISENP
SDATA
SCLK
SMB_ALRT_N
PWRGD
OUTEN
SYNC_IN
SYNC_OUT
VSENP
VSENN
TEMPSEN
ISH_GND
FAULT1
FAULT2
VSET
FSET
VTRIM
IMAXSET
V12SEN
MultiphaseOperation
+5V to +12V
LOAD
IOUT/ISHI-share
SADDR
RSENSE
RBCB
D1RCM
R1
R2
4.7F
8
7
5
6
1
2
4
3
UGATE
BOOT
PWM
GND
PHASE
EN
VCC
LGATE
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