UCD90124A Datasheet, PDF (1/51 Pages) Texas Instruments – 12-Rail Power Supply Sequencer and Monitor with ACPI Support and Fan Control

UCD90124A
www.ti.com
SLVSAN8 – JANUARY 2012
12-Rail Power Supply Sequencer and Monitor with ACPI Support and Fan Control
Check for Samples: UCD90124A
FEATURES
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•2 Monitor and Sequence 12 Voltage Rails
– All Rails Sampled Every 400 μs
– 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
• Nonvolatile Error and Peak-Value Logging per
Monitor (up to 12 Fault Detail Entries)
• Closed-Loop Margining for 10 Rails
– Margin Output Adjusts Rail Voltage to
Match User-Defined Margin Thresholds
• Programmable Watchdog Timer and System
Reset
• Flexible Digital I/O Configuration
• Pin-Selected Rail States
• 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
• JTAG and I²C/SMBus/ PMBus™ Interfaces
APPLICATIONS
• Industrial / ATE
• Telecommunications and Networking
Equipment
• Servers and Storage Systems
• Any System Requiring Sequencing and
Monitoring of Multiple Power Rails
DESCRIPTION
The UCD90124A is a 12-rail PMBus/I²C addressable
power-supply sequencer and monitor. The device
integrates a 12-bit ADC for monitoring up to 12
power-supply voltage 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 UCD90124A offers
support for fan control, margining, and
general-purpose PWM functions.
Specific power states can be achieved using the
Pin-Selected Rail States feature. This feature allows
with the use of up to 3 GPIs to enable and disable
any rail. This is useful for implementing system
low-power modes and the Advanced Configuration
and Power Interface (ACPI) specification that is used
for hardware devices.
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
WDI from main
processor
WDO
POWER_GOOD
WARN_OC_0.8V_
OR_12V
SYSTEM RESET
OTHER
SEQUENCER DONE
(CASCADE INPUT)
3.3V_UCD
5.1V
12V OUT
TEMP12V
TEMP IC
VMON
VMON
VMON
VMON
VMON
VMON
VMON
VMON
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
UCD90124A
I2C/
PMBUS
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.
PMBus, Fusion Digital Power are trademarks of Texas Instruments.
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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 © 2012, Texas Instruments Incorporated