UCD90910 Datasheet, PDF (1/51 Pages) Texas Instruments – 10-Rail Sequencer and System Health Monitor With 10-Fan Control

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UCD90910
SLVSA81 – JULY 2010
10-Rail Sequencer and System Health Monitor With 10-Fan Control
Check for Samples: UCD90910
FEATURES
1
•23 Monitor and Sequence Ten Voltage Rails
– All Rails Sampled Every 400 ms
– 12-Bit ADC With 2.5-V, 0.5% Internal V_REF
– Sequence Based on Time, Rail and Pin
Dependencies
– Four Programmable Undervoltage and
Overvoltage Thresholds per Monitor
• Fan Control and Monitoring
– Supports Ten Fans With Five User-Defined
Speed-vs-Temperature Setpoints
– Supports Two-, Three-, and Four-Wire Fans
• Nonvolatile Error and Peak-Value Logging per
Monitor (up to 12 Faults)
• Closed-Loop Margining for Ten Rails
– Margin Output Adjusts Rail Voltage to
Match User-Defined Margin Thresholds
• Programmable Watchdog Timer and System
Reset
• Flexible Digital I/O Configuration
• Multiphase PWM Clock Generator
– Clock Frequencies From 15.259 kHz to
125 MHz
– Capability to Configure Independent Clock
Outputs for Synchronizing Switch-Mode
Power Supplies
• Internal Temperature Sensor
• JTAG and I²C™ / SMBus / PMBus Interfaces
• Full Configuration Update while in Normal
Mode Capability
APPLICATIONS
• Industrial / ATE
• Telecommunications and Networking
Equipment
• Servers and Storage Systems
• Any System Requiring Sequencing and
Monitoring of Multiple Power Rails
DESCRIPTION
The UCD90910 is a ten-rail I²C / PMBus addressable
power-supply sequencer and system-health
monitor. The device integrates a 12-bit ADC for
monitoring up to 13 power-supply voltage, current, or
temperature inputs.
Twenty-six GPIO pins can be used for power-supply
enables, power-on-reset signals, external interrupts,
cascading, or other system functions. Twelve of these
pins offer PWM functionality. Using these pins, the
UCD90910 offers support for fan control, margining,
and general-purpose PWM functions.
Fan-control signals can be sent using PMBus
commands or generated from one of two built-in
fan-control algorithms. PWM outputs combined with
temperature and fan-speed measurements provide a
complete fan-control solution for up to ten
independent fans.
The TI Fusion Digital Power™ designer software is
provided for device configuration. This PC-based
graphical user interface (GUI) offers an intuitive
interface for configuring, storing, and monitoring all
system operating parameters.
12V
I12V
INA196
12V OUT
3.3V OUT
1.8V OUT
0.8V OUT
I0.8V
TEMP0.8V
I12V
TEMP12V
5.1V
MON
MON
MON
MON
MON
MON
MON
MON
3.3V_UCD
WDI from main
processor
WDO
POWER_GOOD
WARN_OC_0.8V_
OR_12V
SYSTEM RESET
OTHER
SEQUENCER DONE
(CASCADE INPUT)
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
UCD90910
I2C/
PMBUS
12V OUT
TEMP12V
TEMP IC
GPIO
GPIO
VIN
VOUT
/EN
DC-DC 1
VFB
3.3V OUT
GPIO
VIN
/EN VOUT
LDO1
1.8V OUT
GPIO
2MHz
PWM
TEMP0.8V
TEMP IC
VIN
VOUT
/EN
DC-DC 2
VFB
0.8V OUT
I0.8V
INA196
Vmarg
Closed Loop
Margining
12 V
4- wire Fan
PWM
25 kHz Fan PWM
12V
PWM
JTAG
GPIO
Fan Tach
TACH
GND
DC Fan
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Fusion Digital Power is a trademark of Texas Instruments.
2
I²C is a trademark of NXP B.V.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated