|
|
PDF ADM1073 Data sheet ( Hoja de datos )
| Número de pieza | ADM1073 | |
| Descripción | Full-Feature 48 V Hot Swap Controller | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADM1073 (archivo pdf) en la parte inferior de esta página. Total 25 Páginas | ||
|
No Preview Available !
Data Sheet
Full-Feature −48 V Hot Swap Controller
ADM1073
FEATURES
Precision inrush linear current limit
Soft start inrush current limit profiling
Precision maximum on-time in current limit
Maximum on-time modulated by FET drain voltage for
additional SOA protection
Adjustable PWM retry scheme and multiple device cascading
capability for charging large capacitive loads
Limited number of PWM cycles for FET SOA protection under
short circuit condition
Ability to configure device as continuous autoretry with a
5-second cooling period
Shunt regulator topology to allow very large transient input
supplies
Separate UV and OV pins for programming allowable input
supply window
Programmable OV hysteresis using current source into pin
when supply is high
Programmable UV hysteresis using current sink from pin
when supply is low
PWRGD output indicates when capacitor charging complete
SPLYGD output indicates when supply is within
valid window
LATCHED output indicates the end of the retry cycle before
load capacitance is charged
SHDN input for user-commanded shutdown
RESTART input for user-triggered 5-second shutdown and
autorestart— virtual card reseat
FUNCTIONAL BLOCK DIAGRAM
OV
UV
SS
TIMER
VIN
VCC AND
REFERENCE
GENERATOR
OVERVOLTAGE
DETECTOR
UNDERVOLTAGE
DETECTOR
SOFT START
CONTROL
tON CONTROL
5 SECOND
SHUTDOWN
SPLYGD
FOLDBACK
AND PWRGD
PWRGD
DRAIN
VIN
100mV(MAX)
50∝A
GATE
FAULT TIMER
AND CONTROL
OSCILLATOR PWM
TIMEOUT
SENSE
VEE
SHDN
RESTART
LATCHED
Figure 1.
APPLICATIONS
Central office switching
Telecommunication and data communication equipment
−48 V distributed power systems
Negative power supply control
High availability servers
−48 V power supply modules
Disk arrays
GENERAL DESCRIPTION
The ADM1073 is a full-feature, negative voltage, hot swap
controller that allows boards to be safely inserted and removed
from a live −48 V backplane. The part provides precise and
robust current limiting, and protection against both transient
and nontransient short circuits in overvoltage and undervoltage
conditions. The ADM1073 can operate from a negative voltage
of −18 V to −80 V and can tolerate transient voltages of up to
−200 V.
Inrush current is limited to a programmable value by control-
ling the gate drive of an external N-channel FET. The maximum
current limit is set by the choice of the sense resistor, RSENSE.
A built-in soft start function allows control of the inrush
current profile by an external capacitor on the soft start (SS)
pin.
An external capacitor on the TIMER pin determines the time
for which the FET gate is controlled to be high when maximum
inrush current flows. The ADM1073 employs a limited consec-
utive retry scheme, whereby, if the load capacitance is not fully
charged within one attempt, the FET gate is pulled low and
retries after a cooling period.
(continued on Page 3)
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADM1073
Data Sheet
SPECIFICATIONS
VDD = 0 V, VEE = −48 V; TA = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
Min Typ Max Unit Test Conditions
BOARD SUPPLY (Not Connected Directly to Device)
Limited by external components
Maximum Voltage Range
−200 −48 −18 V
Typical Operating Voltage Range
−80 −48 −35 V
VIN PIN—SHUNT REGULATOR
Operating Supply Voltage Range
11.7 12.3 12.9 V
IIN = 0.6 mA to 2 mA
Quiescent Supply Current
300 500 μA
VIN = 11.7 V
Maximum Shunt Supply Voltage
14 V
IIN = 10 mA
Undervoltage Lockout, VLKO
8V
Power-On Reset Delay
150 ms
UV, OV PINS—UNDERVOLTAGE AND OVERVOLTAGE DETECTION
Undervoltage Falling Threshold, VUVF
825 868 910 mV
Undervoltage Hysteresis Current
5 μA
Undervoltage Fault Filter
0.6 ms
Overvoltage Rising Threshold, VOVR
1.86 1.93 2.00 V
Overvoltage Hysteresis Current
5 μA
Overvoltage Fault Filter
5 μs
Input Current
0.2 μA
GATE PIN—FET DRIVER
Maximum Gate Voltage
11.5
VIN(MAX) V
IGATE = −1.0 μA
Minimum Gate Voltage
10 100 mV
IGATE = 1.0 μA
Pull-Up Current
−50 μA VGATE = 0 V to 8 V; VSS = 2 V
−36 μA VGATE = 0 V to 8 V; VSS = 0 V
Pull-Down Current
20 mA VGATE > 2 V
50 mA VGATE > 5 V
SENSE PIN—CURRENT SENSE—SOFT START
Current Limit Control Loop Threshold, VACL
97 100 103 mV
IGATE = 0 mA
Circuit Breaker Limit Voltage, VCB
86 90
mV
Fast Current Limit Voltage, VFCL
110 mV
Control Loop Transconductance
4.5 μA/mV
Soft Start Pin Current
5 μA
TIMER PIN—PWM CONTROL
Minimum TIMER Pull-Up Current
18 19 20 μA IPWRGD < 4 μA; TA = 25°C to 85°C
16 19 20 μA IPWRGD < 4 μA
Maximum TIMER Pull-Up Current
37 39 41 μA IPWRGD = 24 μA; TA = 25°C to 85°C
34 39 41 μA IPWRGD = 24 μA
TIMER Pull-Down Current
1 μA
TIMER Low Voltage Trip Point
0.45 0.50 0.55 V
TIMER High Voltage Trip Point
2.34 2.42 2.50 V
Current Limit On-Time, tON
6 ms IDRAIN = 4 μA; CTIMER = 47 nF
Current Limit On-Time, tON, with Foldback
3 ms IDRAIN = 20 μA; CTIMER = 47 nF
Number of Consecutive PWM Retry Cycles
7
Continuous Short-Circuit Time before Latched Shutdown
0.6 s CTIMER = 47 nF
Rev. B | Page 4 of 24
5 Page 
ADM1073
1000
980
960
940
920
900
880
860
840
820
800
–50 –35 –20 –5 10 25 40 55 70
TEMPERATURE (°C)
Figure 15. UV Threshold vs. Temperature
85
2.00
1.98
1.96
1.94
1.92
1.90
1.88
1.86
1.84
1.82
1.80
–50 –35 –20 –50 10 25 40 55 70
TEMPERATURE (°C)
Figure 16. OV Threshold vs. Temperature
85
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –35 –20 –5 10 25 40 55 70 85
TEMPERATURE (°C)
Figure 17. UV Voltage Fault Filter Time vs. Temperature
Data Sheet
10
9
8
7
6
5
4
3
2
1
0
–50 –35 –20 –5 10 25 40 55 70 85
TEMPERATURE (°C)
Figure 18. OV Voltage Fault Filter Time vs. Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –35 –20 –5 10 25 40 55 70
TEMPERATURE (°C)
Figure 19. ISENSE vs. Temperature (VSENSE = 50 mV)
85
80
60
40
20
0
–20
–40
–60
–80
–2
–1.5 –1.0 –0.5
0
0.5 1.0 1.5 2.0
VSENSE (V)
Figure 20. ISENSE vs. (VSENSE − VEE)
Rev. B | Page 10 of 24
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet ADM1073.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADM1070 | -48 V Hot Swap Controller | Analog Devices |
| ADM1072 | Dual/ USB 2.0 Full/Standby Power Controller with Supply Steering | Analog Devices |
| ADM1073 | Full-Feature 48 V Hot Swap Controller | Analog Devices |
| ADM1075 | -48V Hot Swap Controller and Digital Power Monitor | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |