ISL6144IVZA Intersil, ISL6144IVZA Datasheet

IC CTRLR MOSFET ORING HV 16TSSOP

ISL6144IVZA

Manufacturer Part Number
ISL6144IVZA
Description
IC CTRLR MOSFET ORING HV 16TSSOP
Manufacturer
Intersil
Datasheet

Specifications of ISL6144IVZA

Applications
Telecom/Datacom Systems
Fet Type
N-Channel
Number Of Outputs
1
Internal Switch(s)
No
Delay Time - On
1ms
Delay Time - Off
250ns
Voltage - Supply
10 V ~ 75 V
Operating Temperature
-40°C ~ 105°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Supply
-

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High Voltage ORing MOSFET Controller
The ISL6144 ORing MOSFET Controller and a suitably sized
N-Channel power MOSFET(s) increases power distribution
efficiency and availability when replacing a power ORing diode
in high current applications.
In a multiple supply, fault tolerant, redundant power distribution
system, paralleled similar power supplies contribute equally to
the load current through various power sharing schemes.
Regardless of the scheme, a common design practice is to
include discrete ORing power diodes to protect against reverse
current flow should one of the power supplies develop a
catastrophic output short to ground. In addition, reverse current
can occur if the current sharing scheme fails and an individual
power supply voltage falls significantly below the others.
Although the discrete ORing diode solution has been used for
some time and is inexpensive to implement, it has some
drawbacks. The primary downside is the increased power
dissipation loss in the ORing diodes as power requirements for
systems increase. Another disadvantage when using an ORing
diode would be failure to detect a shorted or open ORing diode,
jeopardizing power system reliability. An open diode reduces
the system to single point of failure while a diode short might
pose a hazard to technical personnel servicing the system
while unaware of this failure.
The ISL6144 can be used in 9V to 75V systems having similar
power sources and has an internal charge pump to provide a
floating gate drive for the N-Channel ORing MOSFET. The High
Speed (HS) Comparator protects the common bus from
individual power supply shorts by turning off the shorted feed’s
ORing MOSFET in less than 300ns and ensuring low reverse
current.
An external resistor-programmable detection level for the HS
Comparator allows users to set the N-Channel MOSFET
“V
supply noise.
The Hysteretic Regulating (HR) Amplifier provides a slow turn-
off of the ORing MOSFET. This turn-off is achieved in less than
100μs when one of the sourcing power supplies is shutdown
slowly for system diagnostics, ensuring zero reverse current.
This slow turn-off mechanism also reacts to output voltage
droop, degradation, or power-down.
An open drain FAULT pin will indicate that a fault has occurred.
The fault detection circuitry covers different types of failures;
including dead short in the sourcing supply, a short of any two
ORing MOSFET terminals, or a blown fuse in the power
distribution path.
OUT
- V
IN
” trip point to adjust control sensitivity to power
®
1
Data Sheet
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
Features
• Wide Supply Voltage Range +9V to +75V
• Transient Rating to +100V
• Reverse Current Fault Isolation
• Internal Charge Pump Allows the use of N-Channel
• HS Comparator Provides Very Fast <0.3µs Response
• HR Amplifier allows Quiet, <100µs MOSFET Turn-off for
• Open Drain, Active Low Fault Output with 120µs Delay
• Provided in Packages Compliant to UL60950 (UL1950)
• QFN Package:
• Pb-Free (RoHS Compliant)
Applications
• ORing MOSFET Control in Power Distribution Systems
• N + 1 Redundant Distributed Power Systems
• File and Network Servers (12V and 48V)
• Telecom/Datacom Systems
MOSFET
Time to Dead Shorts on Sourcing Supply. HS Comparator
also has Resistor-adjustable Trip Level
Power Supply Slow Shut Down
Creepage Requirements
- Compliant to JEDEC PUB95 MO-220
- Near Chip Scale Package footprint, which improves
QFN - Quad Flat No Leads - Package Outline
PCB efficiency and has a thinner profile
January 6, 2011
All other trademarks mentioned are the property of their respective owners.
Copyright © Intersil Americas Inc. 2004, 2006-2011. All Rights Reserved
ISL6144
FN9131.6

Related parts for ISL6144IVZA

ISL6144IVZA Summary of contents

Page 1

... Telecom/Datacom Systems CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL6144 FN9131.6 Copyright © Intersil Americas Inc. 2004, 2006-2011. All Rights Reserved ...

Page 2

... Ordering Information PART NUMBER (Note) ISL6144IVZA* ISL61 44IVZ ISL6144IRZA* ISL6144 IRZ ISL6441EVAL1Z Evaluation Platform *Add “-T*” suffix for tape and reel. Please refer to NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations) ...

Page 3

General Application Circuit + - AC/DC 1 VIN ISL6144 HVREF 5V FAULT AC/ VIN ISL6144 HVREF 5V FAULT NOTES: 1. AC/DC 1 through ( are multistage AC/DC converters which include AC/DC rectification stage and a ...

Page 4

Simplified Block Diagram SOURCE 75V SOURCE 1 VIN 9V TO 75V GATE LOGIC AND CHARGE PUMP C 1 5.5V LEVEL SHIFT HVREF DELAY 100µs FAULT 1.5mA GND 4 ISL6144 F2** C VIN GATE VOUT ...

Page 5

... IN Maximum Junction Temperature (Plastic Package +150°C OUT -5V Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C OUT Pb-Free Reflow Profile .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = -40°C to +105°C, Unless Otherwise Specified. Boldface limits apply over the operating A TEST CONDITIONS V Rising to V > 7.5V ...

Page 6

Electrical Specifications V = 48V temperature range, -40°C to +105°C. PARAMETER SYMBOL VSET Voltage (V - VSET) V OUT REF(VSET) Fault Low Output Voltage V FLT_L Fault Sink Current I FLT_SINK Fault Leakage Current I FLT_LEAK Fault Delay ...

Page 7

The slow turn-off is achieved in two stages. The first stage starts with a slow turn-off action and lasts for up to 20µs. The gate pull down current for the first stage is 2mA. The second slow turn-off stage completes ...

Page 8

High Voltage Pass and Clamp A high voltage pass and clamping circuit prevents the high output voltage from damaging the comparators in case of quick drop The comparators are running from the 5V IN supply between HVREF ...

Page 9

Power loss across the ORing devices is as shown in Equation 6: ⋅ ⋅ P loss D I OUT V F 40A 0. ⋅ loss I OUT ...

Page 10

The duration of the reverse current pulse is a few hundred nanoseconds and is normally kept well below current rating of the ORing MOSFET. Reducing the value of V results in lower reverse TH(HS) current amplitude and reduces transients on ...

Page 11

Typical Performance Curves and Waveforms 6.000 5.875 5.750 5.625 5.500 5.375 5.375 5.250 -40 - TEMPERATURE (°C) FIGURE 8. HVREF VOLTAGE r = 19mΩ, QTOT = 70nC, DS(ON) EXTERNAL C = 33nF TH(HS ...

Page 12

Typical Performance Curves and Waveforms I IN2 V OUT FIGURE 12. SLOW SPEED TURN-OFF, V LOAD IS SMPS (C = 100µF) WITH LOAD EQUIVALENT 4A LOAD Application Circuit (NOTE 13) DC/DC INPUT BUS 1 #1 36V TO 75VDC +IN +OUT ...

Page 13

Using the ISL6144EVAL1Z High Voltage ORing MOSFET Controller Evaluation Board In a multiple supply, fault tolerant, redundant power distribution system, paralleled power supplies contribute equally to the load current through various power sharing schemes. Regardless of the scheme, a common ...

Page 14

... Control Board has two parallel feeds connected to each other through N-channel ORing MOSFETs. Each ORing MOSFET has an ISL6144 connected to it. This board demonstrates the operation of Intersil’s ISL6144 HV ORing MOSFET Controller typical redundant power system. To demonstrate the functionality of the ISL6144, two power supplies with identical output voltages are required as the input to the ISL6144EVAL1Z board ...

Page 15

Input Voltage Range (+9V to +75V) The ISL6144 can operate in equipment with voltages in the +9V to +75V range. The ISL6144 can also be used in systems with negative voltages -9V to -75V, but it has to be placed ...

Page 16

... The DC/DC converter board consists of two DC/DC converters with independent input voltage rails. In reality, two identical power supplies can be used in the test setup to replace this board (contact Intersil Applications Engineering if you need assistance in your test setup). This DC/DC converter board is configured for operation at different output voltage levels depending on the choice of DC/DC modules ...

Page 17

The charge pump circuitry starts functioning as the input voltage at the V pin reaches a value around 8V. The gate voltage IN depends on the load current (as explained in ...

Page 18

Gate Fast Turn-off Test During normal operation, the ISL6144 provides gate drive voltage for the ORing MOSFET when the Input voltage exceeds the output voltage. The current flows in the forward direction from the input to the output. Now, what ...

Page 19

The ISL6144EVAL1Z board has V TH(HS) changed if performance is found to be unacceptable with this value. V can affect the amplitude of the reverse current TH(HS) (short pulse) that might flow before the gate is effectively turned off (details ...

Page 20

Detection of Power Feed Faults The ISL6144 have two built-in mechanisms that monitor voltages at VIN, VOUT and GATE pins. The first mechanism monitors GATE with respect to VIN (with a 410mV threshold) and the second mechanism monitors V IN ...

Page 21

Fault 6: ORing FET Body Diode Conduction (V - 0.41V > the voltage drop across the IN OUT MOSFET approaches 410mV, a fault will be indicated. Make sure the selection of the ORing MOSFET takes this fact ...

Page 22

This shows that worst-case failure scenario has to be accounted for when choosing the ORing MOSFET. In both cases, more than one ORing MOSFET/diode has to be paralleled on each feed. Using parallel devices reduces power dissipation per device and ...

Page 23

For a 12V to 24V Input: TABLE 2. INPUT VOLTAGE = 12V TO 24V I MOSFET PART NUMBER Load_Max 15A IRF1503S (Note 14) SUM110N03-03P (Note 15) STB100NF03L-03 (Note 16) 40A IRF1503S SUM110N03-03P STB100NF03L-03 75A IRF1503S SUM110N03-03P STB100NF03L-03 NOTES: 14. V ...

Page 24

SET V TH(HS OPERATE ALL FEEDS IN CURRENT SHARING MODE ( IN1 n = N+1 INCREASE NO COMPARE GATE-SOURCE V VOLTAGES TH(HS) (BY INCREASING ≅ GS1 R1 ONLY) USE CURRENT VALUES of R ...

Page 25

... ORing MOSFET(s), number of paralleled 1 3 MOSFETs depends on device r DS(ON) losses and junction temperature of the ORing MOSFETs Intersil’s ISL6144 High Voltage ORing MOSFET Controller IC. LED1 - is a red LED used to indicate first feed faults. When off while V and auxiliary 5V supply are present ...

Page 26

ISL6144EVAL1Z Schematics V J1 EXTERNAL 5V AUX1 VIN1 SOURCE1 TP17 J4 VIN1 TP1 FROM PS1 U3 2 VIN C 1 TP28 150nF VIN1 3 10V HVREF 2 4 TP9 4 J6 NC1 5 NC2 6 NC3 C ...

Page 27

Bill of Materials COMPONENT NAME CONTROL BOARD BOM Programming Resistor 1 6 TH(HS Programming Resistor 2 7 TH(HS FAULT Pull-up Resistor FAULT LED Current ...

Page 28

Package Outline Drawing M16.173 16 LEAD THIN SHRINK SMALL OUTLINE PACKAGE (TSSOP) Rev 2, 5/10 5.00 ±0.10 16 6.40 4.40 ±0. 0. TOP VIEW H C SEATING PLANE 0.10 C SIDE VIEW (5.65) (0.65 ...

Page 29

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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