DataSheet.es    


PDF 34653 Data sheet ( Hoja de datos )

Número de pieza 34653
Descripción Negative Voltage Hot Swap Controller
Fabricantes Freescale Semiconductor 
Logotipo Freescale Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de 34653 (archivo pdf) en la parte inferior de esta página.


Total 24 Páginas

No Preview Available ! 34653 Hoja de datos, Descripción, Manual

www.DataSheet4U.com
Freescale Semiconductor
Advance Information
Document Number: MC34653
Rev. 8.0, 2/2007
1.0 A Negative Voltage Hot
Swap Controller
34653
The 34653 is a highly integrated -48 V hot swap controller with an
internal Power MOSFET. It provides the means to safely install and
remove boards from live -48 V backplanes without having to power
down the entire system. It regulates the inrush current, from the
supply to the load’s filter capacitor, to a user-programmable limit,
allowing the system to safely stabilize. A disable function allows the
user to disable the 34653 manually or through a microprocessor and
safely disconnect the load from the main power line.
The 34653 has active high and active low power good output
signals that can be used to directly enable a power module load.
Undervoltage and overvoltage detection circuitry monitors the input
voltage to check that it is within its operating range. A start-up delay
timer ensures that it is safe to turn on the Power MOSFET and charge
the load capacitor.
A two-level current limit approach to controlling the inrush current
and switching on the load limits the peak power dissipation in the
Power MOSFET. Both current limits are user programmable.
Features
• Integrated Power MOSFET and Control IC in a Small Outline
Package
• Input Voltage Operation Range from -39 V to -74 V
• Programmable Overcurrent Limit with Auto Retry
• Programmable Charging Current Limit Independent of Load
Capacitor
• Start-Up and Retry Delay Timer
• Overvoltage and Undervoltage Detection
• Active High and Low Power Good Output Signals
• Thermal Shutdown
• Pb-Free Packaging Designated by Suffix Code EF
HOT SWAP
EF SUFFIX (Pb-Free)
98ASB42564B
8-PIN SOICN
ORDERING INFORMATION
Device
MCZ34653EF/ R2
MC34653EF/ R2
Temperature
Range (TA)
-40°C to 85°C
Package
8 SOICN
34653
GND
System
Power
Supply
(Backplane)
DISABLE
VPWR
PG
PG
VOUT
Application
Dependent
Load
-48 V
VIN
Optional
External
Components
ILIM ICHG
Optional
External
Components
Figure 1. 34653 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.

1 page




34653 pdf
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
Characteristics noted under conditions 36 V VPWR 80 V and -40°C TA 85°C. All voltages are referenced to VIN unless
otherwise noted.
Characteristic
Symbol
Min
POWER SUPPLY PIN (VPWR)
Supply Voltage
Operating Voltage Range
Supply Current, Device Enabled, Default Mode, Normal Operation (11)
Undervoltage Lockout Threshold (UVLO)
Rising
Falling
Hysteresis
VPWR
VPWR
IIN
VUVLOR
VUVLOF
VUVLOHY
36
VUV (ON)
7.0
6.0
UNDERVOLTAGE CONTROL
UV Threshold (Default)
Rising
Falling
Hysteresis
VUV(ON)
VUV(OFF)
VUVHY
OVERVOLTAGE CONTROL
OV Threshold (Default)
Rising
Falling
Hysteresis
DISABLE INPUT CONTROL PIN (DISABLE) (12)
VOV (OFF)
VOV (ON)
VOVHY
DISABLE Input Voltage
Inactive State
Active State, Positive Signal
Active State, Negative Signal
VDISL
VDISHP
VDISHN
VPWR - 1.2
VPWR + 2.0
DISABLE Input Current
VDIS = VPWR + 3.3 V
VDIS = VPWR - 3.3 V
VDIS = VIN
IDIS
20
- 20
- 50
Notes
11. The supply current depends on operation mode and can be calculated as follows:
•Start-Up Mode: IIN = 539 µA + 548 µ * ICHG(A) + 216 µ * ILIM(A) + VPWR(V) / 460(k)
•Normal Mode: IIN = 539 µA + 240 µ * ILIM(A) + 288 µ * ILOAD(A) + VPWR(V) / 460(k)
•Overcurrent Mode: IIN = 539 µA + 612 µ * ILIM(A) + VPWR(V) / 460(k)
•Disable Mode: IIN = 539 µA + 240 µ * ILIM(A) + IDIS(µA) + VPWR(V) / 460(k)
12. Referenced to VPWR.
Typ
900
8.0
7.0
1.0
38
37
1.0
78
76
2.0
60
- 60
-150
Max
80
VOV (ON)
1400
9.0
8.0
VPWR + 1.2
VPWR - 2.0
140
-140
- 250
Unit
V
V
µA
V
V
V
V
µA
Analog Integrated Circuit Device Data
Freescale Semiconductor
34653
5

5 Page





34653 arduino
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Figure 7. Power MOSFET Turn-On and the Gradual
Increase in the Charging Current from 0 A to ICHG
(2.0 ms in Example)
The ICHG current charges up the load capacitor relatively
slowly. When the load capacitor is fully charged, the Power
MOSFET reaches its full enhancement, which triggers the
current limit detection to change from ICHG to ILIM and the load
current to decrease (Point C in Figure 6, page 10). The
current spike at Point C in Figure 6 is better displayed in
Figure 8. We can see that when the VOUT - VIN < 0.5 V, the
Power MOSFET fully turns on to reach its full enhancement,
charging the capacitor an additional 0.5 V with a higher
current value that quickly ramps down. This eliminates the
need for a current slew rate control because the hazard for a
voltage change is less than 0.5 V. The power good output
signals activate after a 20 ms delay (Point D in Figure 6),
which in turn enables the load. The 34653 is now in normal
operation mode and the retry counter resets.
NORMAL MODE
If one of the start-up conditions (list on page 10) is violated
any time from the start of the Power MOSFET enhancement
process and thereafter during normal operation, the Power
MOSFET turns off and the power good output signals
deactivate, disabling the load, and a new timer cycle starts as
explained previously. The 34653 also monitors the load
current to prevent any overload or short circuit conditions
from happening to protect the load from damage.
LOAD CURRENT CONTROL
When in normal operation mode, the 34653 monitors the
load and provides two modes of current control as explained
in the paragraphs below.
Overcurrent Mode
The 34653 monitors the load for overcurrent conditions. If
the current going through the load becomes larger than the
overcurrent limit for longer than the overcurrent limit filter
timer of 100 µs, the overcurrent signal is asserted and the
gate of the Power MOSFET is discharged to try to regulate
the current at the ILIM value (Point A in Figure 9). The 34653
is in overcurrent mode for 3.0 ms. If after a 3.0 ms filter timer
the device is still in overcurrent mode, the device turns off the
Power MOSFET and deactivates the power good output
signals (Point B in Figure 9). The 34653 then initiates another
start-up timer and goes back through the enhancement
process. If during the 3.0 ms timer the fault was cleared, then
the 34653 goes back to the normal operation mode and the
power good output signals stay activated as shown in
Figure 10. This way the device overcomes temporary
overcurrent situations and at the same time protects the load
from a more severe overcurrent situation.
Short Circuit Mode
If the current going through the load becomes >5.0 A, the
Power MOSFET is discharged very fast (in less than 10 µs)
to try to regulate the current at the ILIM value, and the 34653
is in the overcurrent mode for 3.0 ms. Then it follows the
pattern outlined in the Overcurrent Mode paragraph above.
Figure 8. Full Power MOSFET Turn-On and Current
Spike Associated with It. End of Charging Process
Analog Integrated Circuit Device Data
Freescale Semiconductor
34653
11

11 Page







PáginasTotal 24 Páginas
PDF Descargar[ Datasheet 34653.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
34652Negative Voltage Hot Swap ControllerFreescale Semiconductor
Freescale Semiconductor
34653Negative Voltage Hot Swap ControllerFreescale Semiconductor
Freescale Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
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,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar