NIS5102
http://onsemi.com
13
For this equation, V
ref
is the reference voltage of the
current limit circuit, and R
DSon
is the on resistance of the
SENSEFET. For more information on this, see application
note AND8140/D, “SMART HotPlugt Current Limit
Function”.
This inherent property of the SENSEFET allows for
simple dual level current limiting, in which a short circuit
condition will see a lower level of limiting than will an
overload. This operation will exist in start up as well as under
normal operation, so the device will be able to differentiate
between a short and an overload.
As with all SMART HotPlug devices, the current limit will
never shutdown the device. Only the thermal limit will stop
the flow of current to the load. Once the current is stopped due
to the thermal limit, it will remain off until input power is
recycled for the latching version, or it will continuously retry
to start again if it is the auto-retry version.
The ILimit graph shown in Figure 5 was generated from
the data of the ILimit characterization, the formula for the
short circuit curve is:
R
ILimit
(W) +
ǒ
152.86
ILimit
Ǔ
1.02
for T
J
+ 25° C
where “ILimit” is the desired short circuit ILimit value, and
R
ILimit
is the programming resistor from the ILimit pin to the
source pin.
Turn-on Surge
During the turn-on event, there is a large amount of
energy dissipated due to the linear operation of the power
device. The energy rating is the amount of energy that the
device can absorb before the thermal limit circuit will shut
the unit down. This is very important specially for the latch
off device as it determines the maximum load capacitance
that the device can charge before the thermal limit shuts the
device down. The calculation of this is not very simple as it
depends on several factors such as the input voltage (Vin),
load capacitance (CL), current limit settings (ILimit) and
device's thermal transient response, therefore, it is
recommended to do lab evaluations for these purposes.
Figure 22 shows the device's thermal transient response for
minimum pad.
0.1
1
10
100
0.00001 0.0001 0.001 0.01 0.1 1 10 100 1000
TIME (seconds)
THETA J(t) (°C/W)
Figure 22. Thermal Transient Response
1-in Pad
Min Pad
NIS5102
http://onsemi.com
14
PACKAGE DIMENSIONS
PLLP-12, 9x9 mm
CASE 488AB-01
ISSUE C
SOLDERING FOOTPRINT*
9.305
12 X
5.652
1.054
12 X
0.551
7.652
1.270 PITCH
Dimensions in mm
*For additional information on our Pb-Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
STYLE 1:
PIN 1. OVLO
2. UVLO
3. ENABLE/TIMER
4. GND
5. CCHARGE
6. CURRENT LIMIT
7. POWER GOOD
8. N/C
9. N/C
10. SOURCE
11. SOURCE
12. SOURCE
DIM MIN MAX
MILLIMETERS
A 1.750 1.950
A1 0.000 0.050
A3 0.254 REF
b 0.400 0.600
D 9.000 BSC
E 9.000 BSC
e 1.270 BSC
D2 5.400 5.600
E2 7.400 7.600
K 0.850 REF
L 0.850 0.950
NOTES:
1. DIMENSIONS AND TOLERANCING PER
ASME Y14.5M, 1994.
2. DIMENSIONS IN MILLIMETERS.
3. COPLANARITY APPLIES TO THE LEAD,
DIMENSION B, AND EXPOSED PAD.
D
E
B
A
4 X
PIN ONE
SEATING
LOCATION
0.08 C
0.15 C
D2
E2
b
K
12 X
L12 X
10 X e
e/2
12 X
A
M
0.10 BC
M
0.05 C
TOP VIEW
BOTTOM VIEW
SIDE VIEW
(A3)
A1
A
C
0.10
C
PLANE
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NIS5102/D
The product described herein (NIS5102), may be covered by one or more of the following U.S. patents: 6,781,502; 6,865,063; 7,099,135. There may be other
patents pending. SMART HotPlug and SENSEFET are trademarks of Semiconductor Components Industries, LLC.
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NIS5102QP1HT1

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Hot Swap Voltage Controllers MI HI SDE SMRT HOTPLUG
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New from this manufacturer.
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