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參數(shù)資料
| 型號： | SMH4046 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Hot-Swap, Active DC Output Control (ADOCTM) Power Manager with I2C lnterface |
| 中文描述： | 熱插拔，有源直流輸出控制（ADOCTM）電源管理器具有I2C lnterface |
| 文件頁數(shù)： | 1/51頁 |
| 文件大?。?/td> | 1024K |
| 代理商： | SMH4046 |
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SMH4046
Preliminary Information
1
(See Last Page)
SUMMIT
Microelectronics, Inc.
The Summit Web Site can be accessed by “right” or “l(fā)eft” mouse clicking on the link:TM
) Power Manager with I
2
C lnterface
FEATURES & APPLICATIONS
Full voltage Control for hot-swap applications
-
Add-in Card insertion detection
-
Platform voltage detection
Universal FPGA configuration I/O pins
High Voltage and logic level enable outputs
Active control (ADOC
TM
) for three downstream
DC/DC converters with
±
0.5% accuracy
Margining of three DC/DC converters
Power-up sequencing of all supply voltages
Power-down sequencing in Forward or Reverse
UV and OV sensors per channel with
programmable reset and interrupt
Programmable glitch filter for all channels
Configuration may be locked
Auto monitoring of all channels and Ext Temp
I
C
serial bus interface
Programmable slew rate control
Integrated 2K EEPROM
Applications
Monitor/Control Distributed and POL Supplies
Multi-voltage Processors, DSPs, ASICs used in
Telecom or server systems
TYPICAL APPLICATIONS DRAWING
INTRODUCTION
The SMH4046 is an all-inclusive power management
controller that integrates hot swap protection of three
positive-voltage supplies (+12V or less). In addition to
hot swapping three bus voltages, it provides
sequencing and Active DC Output Control (ADOC
)
of three on-card DC-DC converters as used in blade
servers and Telecom systems. It can also upload
configuration code from the host to on-card FPGAs.
All six channels can cascade-sequence during power-
up in any order as set by either hardware or firmware;
and sequence down in forward or reverse order.
ADOC
TM
control of the three DC/DC converters
maintains their accuracy to within
±
0.5% of the set
point using an internal voltage reference. ADOC
is
also included during “margining” to allow card-by-card
performance
evaluation
arbitrary setting within
±
10% in any combination.
A full set of monitoring and control features are
included, with user programmability that can be
locked. The SMH4046 uses the I
2
C bus interface for
programming and FPGA configuration
.
during
production
with
+3.3V
+5V
+12V
GND
TEMP
GND
GND
+5V
GND
PCI_RST#
BD_SEL#
HEALTHY#
BD_SEL1#
SMH4046
VGATE5
CARD_5V
G
D
S
G
D
S
VCC3
VGATE3
G
D
S
CARD_3V
VCC12
DRVREN#
CARD_12V
Board 5V
Board 3.3V
R
SDA
SCL
PCI Interface ASIC
S
B
HEALTHY#
CARD_V_VLD
GND
HST_PWR
HST_RST#
PND2#
PUPC
PUPA
VVMB
PUPB
10
F
FPGA
P
F
FS
Ejector
Switch
47nF
47nF
Vout1
Vout2
Vout3
F
F
F
EXT_TMP
1Vref
T
F
B
B
Pre-
Charge
Circuit
OE
VIN
DC/DC #1
DC/DC #2
TRIM
OE
DC/DC #3
VOUT
VOUT
OE
VIN
VOUT
F
I
5
A2
VGG_CAP
1uF
47nF
270k
CARD RESET
FAULT
IRQ
Board 12V
Figure 1 –
Applications Schematic using the SMH4046 Controller to hot swap and actively control the output
levels of three DC/DC Converters while providing power on/off, cascade sequencing and output margining.
Note: This is an applications example only. Some pins, components and values are not shown.
Hot swap
ADOC
TM
Pwr On/Off
Cascade
Sequence
Monitor
Margin
I
2
C