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PDF PX3540 Data sheet ( Hoja de datos )
| Número de pieza | PX3540 | |
| Descripción | Graphics Processor Digital Multiphase Controller | |
| Fabricantes | Primarion | |
| Logotipo |  |
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Graphics Processor Digital Multiphase Controller
Product Brief
PX3540
Applications
Description
• Graphics Processors
• Intelligent Point-of-Load (POL) power regulation
Features
• Multiphase power conversion
• 100 kHz to 2 MHz switching frequency
• Internal high precision voltage reference
− ±12.4mV voltage setpoint accuracy
• Startup and maximum voltages set through external resistor
• 2-bit VID input for additional voltage control
• Driver detect prior to soft-start disables unpopulated phases
• Autonomous or user controlled phase dropping based on
current balance and 12V supply faults
• Supports up to three 12V supplies with phase mapping
• Precise digital current balancing with programmable offsets
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
• Internal non-volatile memory (NVM) to store custom
configurations
• Extensive fault detection capability
− Input Under-voltage
− Output Under-/Over-voltage
− Per Phase and Total Output Current
− Current balance
− Auxiliary 12V supply (both fault and return reported)
• RoHS compliant 48-lead MLF plastic package
Ordering & Packaging Part Number
The PX3540 Graphics Processor Digital Multiphase
Controller provides core power for today’s high current
graphic processors by driving up to six synchronous-rectified
buck-converter channels in parallel. Interleaved timing of the
channels results in a higher ripple frequency, reducing input
and output ripple. With up to six phases, each capable of up
to 2 MHz operation, the PX3540 can be used to build DC-DC
converters that provide up to 200A with excellent efficiency,
low ripple, and the lowest component count.
The PX3540 utilizes digital technology to implement all
control functions, providing the ultimate in flexibility and
stability. The PX3540 incorporates an industry standard I2C-
bus serial interface for control and monitoring. Through the
serial interface, the power supply designer can quickly
optimize designs and monitor system performance. The
interface allows the PX3540 to provide digitized information
for real time system monitoring and control.
The PX3540 provides intelligent phase detection capability
allowing the system to operate under the condition of up to 2
(of 3) missing 12V supplies. Autonomous phase control
circuitry will drop phases due to current balance or 12V faults
and add phases when the 12V supply returns. An I2C based
user phase control mode is also provided.
Block Diagram
VSTART
VMAX
RESET_N
VSENP
VSENN
ISEN6+
ISEN6-
ISEN5+
ISEN5-
ISEN4+
ISEN4-
ISEN3+
ISEN3-
ISEN2+
ISEN2-
ISEN1+
ISEN1-
TEMPSEN
V12_SEN
SCL
SDA
SADDR1
SADDR0
POR
Current
Sense
Temp
Sense
I2C
Window
Comparator
(OVP/UVP)
Voltage
ADC
AVP
Current
ADC
Channel Current
Oscillator
Current
Balance
Internal
Memory
Ref
PID/PWM
Controller
PWM
Driver
Fault Handler
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
FAULT2
FAULT1
Part Number
PX3540BDSG-
XX – XXXXX - X
Ambient
0 to 85°C
Package
48-lead 7mm x
7mm MLF
OUTEN
VID1
VID0
Deglitch
State Machine
VR_READY
Digital Calibration Controller
V12_AUX1
V12_AUX2
Phase Control
PDB-3540-001B
Copyright © 2006, Primarion, Inc.
17-Jul-06
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet PX3540.PDF ] | |
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