UCD90124
www.ti.com
SLVSA29A –NOVEMBER 2009–REVISED DECEMBER 2009
12-Rail Sequencer and System Health Monitor With Fan Control
Check for Samples :UCD90124
1
FEATURES
DESCRIPTION
2
•
Monitor and Sequence 12 Voltage Rails
The UCD90124 is a 12-rail PMBus/I2C addressable
power-supply sequencer and system-health
–
–
–
All Rails Sampled Every 400 μs
12-bit ADC With 2.5-V, 0.5% Internal VREF
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 UCD90124 offers
Sequence Based on Time, Rail and Pin
Dependencies
–
Four Programmable Undervoltage and
Overvoltage Thresholds per Monitor
•
Fan Control and Monitoring
–
Supports Four Fans With Five User-Defined
Speed-vs-Temperature Setpoints
support
for
fan
control,
margining,
and
general-purpose PWM functions.
–
Supports Two-, Three-, and Four-Wire Fans
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 four
independent fans.
•
•
Nonvolatile Error and Peak-Value Logging per
Monitor (up to 12 Faults)
Closed-Loop Margining for 10 Rails
–
Margin Output Adjusts Rail Voltage to
Match User-Defined Margin Thresholds
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.
•
Programmable Watchdog Timer and System
Reset
•
•
Flexible Digital I/O Configuration
Multiphase PWM Clock Generator
12V
12V OUT
–
Clock Frequencies From 15.259 kHz to 125
MHz
TEMP12V
3.3V_UCD
TEMP IC
12V
INA196
5.1V
–
Capability to Configure Independent Clock
Outputs for Synchronizing Switch-Mode
Power Supplies
12V OUT
GPIO
GPIO
VIN
3.3V OUT
VMON
VOUT
/EN
DC-DC
1
3.3V OUT
VFB
VMON
VMON
VMON
VMON
VMON
VMON
VMON
1.8V OUT
0.8V OUT
I0.8V
•
•
Internal Temperature Sensor
JTAG and I2C/SMBus/ PMBus™ Interfaces
VIN
1.8V OUT
/EN VOUT
GPIO
TEMP0.8V
I12V
LDO1
TEMP12V
TEMP0.8V
TEMP IC
APPLICATIONS
/MR
VMON
VIN
0.8V OUT
UCD90124
VOUT
•
Industrial / ATE
/EN
GPIO
WDI from main
processor
DC-DC
2
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
VFB
•
Telecommunications and Networking
Equipment
WDO
I0.8V
INA196
POWER_GOOD
Vmarg
2MHz
PWM
WARN_OC_0.8V_
OR_12V
Closed Loop
Margining
•
•
•
Servers and Storage Systems
Embedded Computing
Any System Requiring Sequencing and
Monitoring of Multiple Power Rails
SYSTEM RESET
4- wire Fan
12
V
OTHER
SEQUENCER DONE
(CASCADE INPUT)
12V
I2C/
PMBUS
25 kHz Fan PWM
PWM
GPIO
PWM
Fan Tach
TACH
GND
JTAG
DC Fan
1
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.
2
PMBus, Fusion Digital Power are trademarks of Texas Instruments.
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 © 2009, Texas Instruments Incorporated
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