SUMMIT SMH4803AHMP, SMH4803AHN, SMH4803AHNP, SMH4803AJK, SMH4803AJKP Datasheet
...
Distributed Power Hot-Swap Controller
FEATURES
• Supply Range ±20VDC to >±500VDC
• Versatile Card Insertion Detection Supports
Both
– Multi-length Pin Systems
– Card Injector Switch Sensing
• Control Up to Four Loads or a Primary Load and
3 DC/DC Converters
• Highly
–
•
Programmable
Sequencing DC/DC Converters
FUNCTIONAL BLOCK DIAGRAM
Programmable
Programmable
Detection
Power Good Delays for
Host Voltage Monitoring
Under- and Over-voltage
•
Programmable
–
Programmable
Programmable
–
Circuit Breaker Function
Over-current Filter
Quick-Trip™ Circuit Breaker
Values
–
Programmable
Circuit Breaker Mode
• Duty-Cycle Mode
• Latched Mode
• 2.5V and 5.0V reference outputs
– Easy Expansion of External
Monitor Functions
eaturing
F
k
c
i
-
u
T
r
P
r
o
g
r
a
m
C
Q
e
l
b
a
e
m
r
B
t
i
u
c
r
i
i
p
TM
e
r
k
a
SMH4803
ASSOCIATE
MEMBER
VDD
EN/TS
PD1#
PD2#
Drain
Sense
CBMode
CBReset#
CBSense
UV
OV
VSS
50kΩ
Programmable
Programmable
Quick-Trip
Ref Voltage
50kΩ
12V
Delay
ENPGB
12V ref
-
+
50kΩ
Filter
-
+
+
-
2.5V
5V
+
-
50
mV
+
-
Fault
Latch
&
Duty
Cycle
Timer
-
+
Programmable
Delay
Programmable
Delay
current limit
12V
Vgate
Sense
PG3#
ENPGA
PG2#
PG1#
2.5V ref
5.0V ref
Vgate
CBFault#
2041 BD 8.0
© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com
2041 8.4 6/15/00
1
Characteristics subject to change without notice
SMH4803
Symbol Pin Description
Drain Sense 1 Drain sense input
Vgate 2 Output to MOSFET gate
EN/TS 3 Enable/Temp Sense input
PD1# 4 Pin Detect 1 (active LO)
PD2# 5 Pin Detect 2 (active LO)
CBFault# 6 Circuit Breaker Fault output
CBReset# 7 Circuit Breaker Reset intput
CBMode 8 Circuit Breaker Mode control
CBSense 9 Cicruit Breaker Sense input
Vss 10 Negative Supply Connection
UV 11 Under Voltage input
OV 12 Over Voltage input
5V 13 5V reference output
2.5V 14 2.5V reference output
ENPGB 15 Enable input B
ENPGA 16 Enable input A
PG3# 17 Power good output 3
PG1# 18 Power good output 1
PG2# 19 Power good output 2
Vdd 20 Positive supply connection
2041 PGM T2.1
PIN CONFIGURATIONS
Drain Sense
Vgate
EN/TS
PD1#
PD2#
CBFault#
CBReset#
CBMode
CBSense
Vss
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Vdd
PG2#
PG1#
PG3#
ENPGA
ENPGB
2.5V
5V
OV
UV
2041 ILL10.1
RECOMMENDED OPERATING CONDITIONS
Condition Min Max
Temperature -40°C +85°C
DESCRIPTION
The SMH4803 is designed to control hot swapping of
plug-in cards operating from a single supply ranging from
20V to 500V. The SMH4803 hot-swap controller provides
under-voltage and over-voltage monitoring of the host
power supply, it drives an external power MOSFET switch
that connects the supply to the load, and also protects
against over-current conditions that might disrupt the host
supply. When the input and output voltages to the
SMH4803 controller are within specification, the
SMH4803 provides three “Power Good” logic outputs that
2041 PGM T3.0
may be used to turn ON the loads, e.g. isolated-output DCDC converters, or drive LED status lights. The SMH4803
provides three separate “Power Good” logic outputs that
activate loads in a timed sequence. Additional features of
the SMH4803 include: temperature sense or master enable input, 2.5V and 5V reference outputs for expanding
monitor functions, two “Pin-Detect” enable inputs for fault
protection, and duty-cycle or latched over-current protection modes.
2041 8.4 6/15/00
2
SUMMIT MICROELECTRONICS
SMH4803
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias -55°C to +125°C
Storage Temperature -65°C to +150°C
Voltage on pins with respect to V
UV, OV, CBSense, Drain Sense -0.5V to Vdd +0.5V
PD1#, PD2#, CBMode, CBReset# 10V
ENPGA, ENPGB, EN/TS
CBFault#, PG1#, PG2#, PG3# -0.5V to Vdd +0.5V
Lead Solder Temperature (10 secs) 300 °C
SS
Vdd -0.5V to Vdd
Vgate Vdd + 0.5V
DC OPERATING CHARACTERISTICS (Over Recommended Operating Conditions, Voltages are relative to V
*COMMENT
Stresses listed under Absolute Maximum Ratings
may cause permanent damage to the device. These
are stress ratings only, and functional operation of
the device at these or any other conditions outside
those listed in the operational sections of this specification is not implied. Exposure to any absolute
maximum rating for extended periods may affect
device performance and reliability.
SS
Symbol Parameter Notes Min. Typ. Max. Units
V
DD
Supply Voltage IDD = 2mA 11 12 13 V
Vref5 5Volt Reference Output IDD = 2mA 4.7 5 5 5.25 V
I
LOAD5
5Volt Reference Output Current IDD = 2mA -1 1 mA
Vref2.5 2.5 Volt Reference Output TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V
Vref2.5 2.5 Volt Reference Output IDD = 2mA 2.425 2.5 2.575 V
I
LOAD2.5
I
DD
V
UV
V
UV
V
UVHYS
V
OV
V
OV
V
OVHYS
V
VGATE
I
VGATE
V
SENSE
V
SENSE
I
SENSE
V
CB
V
QCB
V
ENTS
V
ENTS
V
ENTSHYS
V
IH
2.5 Volt Reference Output Current IDD = 2mA -0.2 1 mA
Power Supply Current Output Enabled 2 10 mA
Under voltage Threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V
Under voltage Threshold IDD = 2mA 2.425 2.5 2.575 V
Under voltage Hysteresis IDD = 2mA 10 mV
Over voltage Threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V
Over voltage Threshold IDD = 2mA 2.425 2.5 2.575 V
Over voltage Hysteresis IDD = 2mA 10 mV
Vgate Output Voltage V
DD
Vgate Current Output 100 µ A
Drain Sense threshold TA = 25 °C, IDD = 2mA 2.475 2.5 2.525 V
Drain Sense threshold IDD = 2mA 2.425 2.5 2.575 V
Drain Sense Output Current (Note 1) V
SENSE
= V
SS
91011µA
Circuit Breaker Threshold IDD = 2mA 40 50 60 mV
Quick-Trip Circuit Breaker Threshold
Option E
Option F
Option H
Option J
200 mV
100 mV
50 mV
OFF
EN/TS Threshold TA = 25 °C, IDD = 2mA 2.425 2.5 2.575 V
EN/TS Threshold IDD = 2mA 2.475 2.5 2.525 V
EN/TS Hysteresis IDD = 2mA 5 10 15 mV
Input High Voltage ENPGA/B, 2 Vref5 V
CBMode, CBReset#
V
IL
Input High Voltage ENPGA/B, -0.1 0.8 V
CBMode, CBReset#
V
OL
V
OL
CBFault# Output Low Voltage IOL = 2mA 0 0.4 V
PG1#, PG2#, PG3# Output Low I
= 2mA 0 0.4 V
SINK
)
V
(Note 1) : TA = 25 °C
SUMMIT MICROELECTRONICS
2041 PGM T4.4
3
2041 8.4 6/15/00
SMH4803
AC Timing Characteristics, -40oC to +85oC
Symbol Description Min. Typ. Max Unit
t
PDD
t
CBD
P
GD
t
FSTSHTDN
t
CYC
t
VGD
t
CBRST
Pin Detect Delay to Vgate enable 80 ms
50mv Circuit Breaker Delay (Filter)
K 400 µs
L 150 µs
M50µs
N5µs
Power Good Delay (PG1/PG2, PG2/PG3)
A5ms
B20ms
C80ms
D 180 ms
Fast Shut Down Delay From Fault to 200 ns
Vgate Off
Circuit Breaker Cycle Mode Cycle Time 2.5 Sec.
Delay from Release of Reset to Vgate on 100 ns
CBReset# Pulse Width 200 ns
2041 8.4 6/15/00
4
SUMMIT MICROELECTRONICS
VDD
UV
OV
PD1#/PD2#
Vgate
Drain
Sense
SMH4803
≥11V≤13V
2.5V ref
2.5V ref
tPDD
2.5V ref
CBSense
PG1#
ENPGA
PG2#
ENPGB
PG3#
50mV ref
<tCBD
PGD
PGD
2041 ILL18.0
SUMMIT MICROELECTRONICS
Figure 1. Power Sequencing Timing Characteristics
5
2041 8.4 6/15/00
SMH4803
V
IH
CBMode
50mV
CBSense
Vgate
CBReset#
t
CBD
t
CYC
V
IH
Figure 2. Circuit Breaker Timing - Cycle Mode, CBReset# Held High
V
IH
t
CBD
2041 ILL16.0
CBMode
CBSense
Vgate
CBReset#
50mV
V
IL
t
CBD
t
CYC
Figure 3. Circuit Breaker Timing - Cycle Mode, Used to Enable Vgate
2041 ILL17.0
2041 8.4 6/15/00
6
SUMMIT MICROELECTRONICS
SMH4803
CBMode
CBSense
Vgate
CBReset#
VIL
tCBD
50mV
tVGD
tCBRST
2041 ILL14.0
Figure 4. Circuit Breaker Timing - Reset Mode
QCB
50mV
CBSense
Vgate
<t
V
Figure 5. Circuit Breaker Timing - Quick-Trip
CBD
t
FSTSHTDN
2041 ILL15.0
SUMMIT MICROELECTRONICS
7
2041 8.4 6/15/00
Loading...