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PDF ISL6120 Data sheet ( Hoja de datos )
| Número de pieza | ISL6120 | |
| Descripción | Power Distribution Controllers | |
| Fabricantes | Intersil Corporation | |
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Power Distribution Controllers
ISL6115, ISL6116, ISL6117,
ISL6120
This family of fully featured hot swap power controllers
targets applications in the +2.5V to +12V range. The
ISL6115 is for +12V control, the ISL6116 for +5V, the
ISL6117 for +3.3V and the ISL6120 for +2.5V control
applications. Each has a hard wired undervoltage (UV)
monitoring and reporting threshold level approximately
80% of the aforementioned voltage.
The ISL6115 has an integrated charge pump allowing
control of up to +16V rails using an external N-Channel
MOSFET whereas the other devices utilize the +12V
bias voltage to fully enhance the N-Channel pass FET.
All ICs feature programmable overcurrent (OC)
detection, current regulation (CR) with time delay to
latch-off and soft-start.
The current regulation level is set by 2 external
resistors; RISET sets the CR Vth and the other is a low
ohmic sense element across, which the CR Vth is
developed. The CR duration is set by an external
capacitor on the CTIM pin, which is charged with a
20µA current once the CR Vth level is reached. If the
voltage on the CTIM capacitor reaches 1.9V the IC then
quickly pulls down the GATE output latching off the
pass FET.
This family although designed for high side switch
control the ISL6116, ISL6117, ISL6120 can also be
used in a low side configuration for control of much
higher voltage potentials.
Features
• HOT SWAP Single Power Distribution Control
(ISL6115 for +12V, ISL6116 for +5V, ISL6117 for
+3.3V and ISL6120 for +2.5V)
• Overcurrent Fault Isolation
• Programmable Current Regulation Level
• Programmable Current Regulation Time to
Latch-Off
• Rail-to-Rail Common Mode Input Voltage Range
(ISL6115)
• Internal Charge Pump Allows the Use of N-Channel
MOSFET for +12V Control (ISL6115)
• Undervoltage and Overcurrent Latch Indicators
• Adjustable Turn-On Ramp
• Protection During Turn-On
• Two Levels of Overcurrent Detection Provide Fast
Response to Varying Fault Conditions
• 1µs Response Time to Dead Short
• Pb-Free Available (RoHS Compliant)
Applications
• Power Distribution Control
• Hot Plug Components and Circuit
Application Circuits- High Side
Controller
Application Two - Low Side
Controller
+ LOAD
-
1
ISL6115
2 ISL6116
3
ISL6117
ISL6120
4
8
7
6
5
PWRON
PGOOD
OC
+VBUS
LOAD
ISL6116
ISL6117
ISL6120
PWRON
+12V
+V SUPPLY TO BE CONTROLLED
12V REG
OC
April 29, 2010
FN9100.7
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004-2008, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6115, ISL6116, ISL6117, ISL6120
Electrical Specifications
VDD = 12V, TA = TJ = 0°C to +85°C, Unless Otherwise Specified. Temperature limits
established by characterization and are not production tested. Boldface limits apply over the
operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 7)
TYP
MAX
(Note 7) UNITS
PWRON Pull-Up Voltage
PWRN_V
PWRON Pin Open
2.7 3.2 - V
PWRON Rising Threshold
PWR_Vth
1.4 1.7 2.0 V
PWRON Hysteresis
PWR_hys
130
170
250
mV
PWRON Pull-Up Current
PWRN_I
9 17 25 µA
CURRENT REGULATION DURATION/POWER GOOD
CTIM Charging Current
CTIM Fault Pull-Up Current (Note 6)
Current Limit Time-Out Threshold
Voltage
CTIM_ichg0
VCTIM = 0V
CTIM_Vth
CTIM Voltage
16 20 23 µA
- 20 - mA
1.3 1.8 2.3 V
Power Good Pull Down Current
PG_Ipd
VOUT = 0.5V
-
NOTES:
6. Limits established by characterization and are not production tested.
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified.
8
- mA
Description and Operation
The members of this IC family are single power supply
distribution controllers for generic hot swap
applications across the +2.5V to +12V supply range.
The ISL6115 is targeted for +12V switching
applications whereas the ISL6116 is targeted for +5V,
the ISL6117 for +3.3V and the ISL6120 for +2.5V
applications. Each IC has a hardwired undervoltage
(UV) threshold level approximately 17% lower than the
stated voltages.
These ICs feature a highly accurate programmable
current regulation (CR) level with programmable time
delay to latch-off, and programmable soft-start
turnHon ramp all set with a minimum of external
passive components. The ICs also include severe OC
protection that immediately shuts down the MOSFET
switch should a rapid load current transient such as
with a dead short cause the CR Vth to exceed the
programmed level by 150mV. Additionally, the ICs
have a UV indicator and an OC latch indicator. The
functionality of the PGOOD feature is enabled once
the IC is biased, monitoring and reporting any UV
condition on the ISEN pin.
Upon initial power-up, the IC can either isolate the
voltage supply from the load by holding the external
N-Channel MOSFET switch off or apply the supply rail
voltage directly to the load for true hot swap capability.
The PWRON pin must be pulled low for the device to
isolate the power supply from the load by holding the
external N-Channel MOSFET off. With the PWRON pin
held high or floating the IC will be in true hot swap
mode. In both cases the IC turns on in a soft-start
mode protecting the supply rail from sudden in-rush
current.
At turn-on, the external gate capacitor of the N-
Channel MOSFET is charged with a 10µA current
source resulting in a programmable ramp (soft-start
turn-on). The internal ISL6115 charge pump supplies
the gate drive for the 12V supply switch driving that
gate to ~VDD +5V, for the other three ICs the gate
drive voltage is limited to the chip bias voltage, VDD.
Load current passes through the external current
sense resistor. When the voltage across the sense
resistor exceeds the user programmed CR voltage
threshold value, (see Table 1 for RISET programming
resistor value and resulting nominal current
regulation threshold voltage, VCR) the controller
enters its current regulation mode. At this time, the
time-out capacitor, on CTIM pin is charged with a
20µA current source and the controller enters the
current limit time to latch-off period. The length of the
current limit time to latch-off duration is set by the
value of a single external capacitor (see Table 2) for
CTIM capacitor value and resulting nominal current
limited time-out to latch-off duration placed from the
CTIM pin (pin 6) to ground. The programmed current
level is held until either the OC event passes or the
time-out period expires. If the former is the case then
the N-Channel MOSFET is fully enhanced and the CTIM
capacitor is discharged. Once CTIM charges to 1.87V
signaling that the time-out period has expired, an
internal latch is set whereby the FET gate is quickly
pulled to 0V turning off the N-Channel MOSFET
switch, isolating the faulty load.
5 FN9100.7
April 29, 2010
5 Page 
ISL6115, ISL6116, ISL6117, ISL6120
ISL6115EVAL1Z Board
The ISL6115EVAL1Z is default provided as a +12V high
side switch controller with the CR level set at ~1.5A.
See Figure 21 for ISL6115EVAL1Z schematic and Table
4 for BOM. Bias and load connection points are
provided along with test points for each IC pin.
With J1 installed the ISL6115 will be biased from the
+12V supply (VIN) being switched. Connect the load to
VLOAD+. PWRON pin pulls high internally enabling the
ISL6115 if not driven low via PWRON test point or J2.
With R3 = 750Ω the CR Vth is set to 15mV and with
the 10mΩ sense resistor (R1) the ISL6115EVAL1Z has
a nominal CR level of 1.5A. The 0.01µF delay time to
latch-off capacitor results in a nominal 1ms before
latch-off of output after an OC event.
Also included with the ISL6115EVAL1Z board are one
each of the ISL6116, ISL6117 and ISL6120 for
evaluation of those ICs in a high side application.
Remove J1 and provide a separate +12V IC bias supply
via VBIAS test point.
Reconfiguring the ISL6115EVAL1Z board for a higher
CR level can be done by changing the RSENSE and/or
RISET resistor values as the provided FET is rated for a
much higher current.
ISL6116EVAL1 Board
The ISL6116EVAL1 is default configured as a negative
voltage low side switch controller with a ~2.4A CR
level. See Figure 22 for ISL6116EVAL1 schematic and
Table 4 for BOM and component description. This basic
configuration is capable of controlling both larger
positive or negative potential voltages with minimal
changes.
Bias and load connection points are provided in
addition to test points, TP1 to TP8 for each IC pin. The
terminals, J1 and J4 are for the bus voltage and return,
respectively, with the more negative potential being
connected to J4. With the load between terminals J2
and J3 the board is now configured for evaluation. The
device is enabled through LOGIN, TP9 with a TTL
signal. ISL6116EVAL1 includes a level shifting circuit
with an opto-coupling device for the PWRON input so
that standard TTL logic can be translated to the -V
reference for chip control.
When controlling a positive voltage, PWRON can be
accessed at TP8.
The ISL6116EVAL1 is provided with a high voltage
linear regulator for convenience to provide chip bias
from ±24V to ±350V. This can be removed and
replaced with the zener and resistor bias scheme as
discussed earlier. High voltage regulators and power
discrete devices are no longer available from Intersil
but can be purchased from other semiconductor
manufacturers.
Reconfiguring the ISL6116EVAL1 board for a higher CR
level can be done by changing the RSENSE and RISET
resistor values as the provided FET is 75A rated. If
evaluation at >60V, an alternate FET must be chosen
with an adequate BVDSS.
VLOAD+
AGND
HI J2 LOAD
J1
+VBUS
C1
J3 LO
Q2
R7
R1
R2
J4
-VBUS
VOUT
R3
R1
U1
R2
C1
VIN
18
2 ISL6115 7
3 U2 6
45
C2
J2
PWRON
PGOOD
CTIM
C3
R4
J1 +12V
VBIAS
VBIAS
PWRON
C3 ISL6116
U1
TP8
R
G
1
R6
R11
DD1 R5
D2 3.3V
LOGIN
TP9
R8 R10
R9 OFF
0V to 5V
OT1 ON
FIGURE 21. ISL6115EVAL1Z HIGH SIDE SWITCH
APPLICATION
FIGURE 22. ISL6116EVAL1 NEGATIVE VOLTAGE LOW
SIDE CONTROLLER
11 FN9100.7
April 29, 2010
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ISL6120.PDF ] | |
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