ISL6580CR Intersil, ISL6580CR Datasheet - Page 19

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ISL6580CR

Manufacturer Part Number
ISL6580CR
Description
IC DRIVER HIGH SIDE FET 56-QFN
Manufacturer
Intersil
Type
High Side/Low Side Driverr
Datasheet

Specifications of ISL6580CR

Input Type
Non-Inverting
Number Of Outputs
12
On-state Resistance
20 mOhm
Current - Output / Channel
25A
Current - Peak Output
35A
Voltage - Supply
5 V ~ 12 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
56-VQFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6580CR
Manufacturer:
HARRIS
Quantity:
1 757
The second way of responding to a Current Over Load is
performed in the ISL6590 controller. If the sum of the
average currents in all phases exceeds the Over Current
Limit for a prolonged period, the controller is shut down (all
MOSFETs are turned off) and input power must be cycled to
reset the fault.
The limits for Peak Current and Over Load Current are set
with the user interface software. There are 4 steps in the
Peak Current limit and the resulting current is calculated
(based on the value of R
interface software.
OUVP (Output Over Voltage Protection)
and OOVP (Output Under Voltage Protection)
ISL6580 monitors the output voltage and sets a bit in its fault
register if the output voltage is too high (OOVP) or too low
(OUVP).
Voltage at the VSENP_FILT pin is compared to thresholds
above and below normal output voltage (mid point of the
load line). The OOVP and OUVP thresholds are set with the
FIGURE 26. BLOCK DIAGRAM OF PEAK CURRENT LIMITING
FIGURE 28. OOVP OUVP WINDOW COMPARATOR
FIGURE 27. OVER LOAD FAULT
SENSE
19
) and displayed by the user
ISL6580
user interface software . The range is 0 to 232mV in steps of
7.5mV.
If the thresholds are exceeded a bit is set in ISL6580’s status
register. The status register is read periodically by ISL6590.
ISL6590 shuts down the converter until power is cycled.
Temp. Sense (Thermal Shut down)
Each ISL6580 has an on chip, over temperature comparator.
It uses an unbalanced differential pair of lateral PNP
transistors to sense temperature and detect over
temperature. Current in one of the differential pair is 8X the
current in the other. As a result, the delta Vbe due to
temperature is 8X. Voltage at the bases is offset by DAC
controlled current sources. When the Vbe offset reaches the
offsets set by the DAC the output switches (with 10×C
hysteresis).
The trip point can be adjusted from 85× to 145× in 10×C
increments using the user interface software. If any ISL6580
reaches the thermal shut down temperature, a bit is set in its
status register, the converter shuts down until power to the
ISL6590 is cycled.
IUVP (Input Under Voltage Protection)
Each ISL6580 contains a comparator that monitors V
inhibits operation when V
When V
output at 0V until V
7.6V a bit is set in the status register. ISL6590 reads the
status register periodically. When this bit is set the converter
FIGURE 29. OOVP OUVP TRIP LEVELS AND LOAD LINE
FIGURE 30. OVER TEMPERATURE BLOCK DIAGRAM
CC
is turned on, this feature holds the converters
CC
exceeds 7.5V. When V
CC
(12V) is below a fixed threshold.
CC
falls below
CC
and

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