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ISL6115A Datasheet(PDF) 9 Page - Renesas Technology Corp

Part No. ISL6115A
Description  12V Power Distribution Controllers
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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ISL6115A Datasheet(HTML) 9 Page - Renesas Technology Corp

 
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ISL6115A
FN6855 Rev 1.00
Page 9 of 10
April 23, 2010
ISL6115AEVAL1Z Board
The ISL6115AEVAL1Z is default provided as a +12V
high side switch controller with the CR level set at
~2.5A. See Figure 11 for ISL6115AEVAL1Z schematic
and Table 3 for BOM. Bias and load connection points
are provided along with test points for each IC pin.
With J1 installed the ISL6115A will be biased from the
+12V supply (VIN) being switched. Connect the load to
VLOAD+. PWRON pin pulls high internally enabling the
ISL6115A if not driven low via PWRON test point or J2.
With R3 = 1.24k the CR Vth is set to 24.8mV and
with the 10m sense resistor (R1) the
ISL6115AEVAL1Z has a nominal CR level of 2.5~A. The
0.01µF delay time to latch-off capacitor results in a
nominal 1ms before latch-off of output after an OC
event.
Reconfiguring the ISL6115AEVAL1Z 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.
FIGURE 14. ISL6115AEVAL1Z HIGH SIDE SWITCH APPLICATION and PHOTOGRAPH
5
6
8
7
4
3
2
1
ISL6115A
Q1
R3
R2
C1
C3
R4
J1
VBIAS
VIN
+12V
C2
R1
PWRON
VBIAS
AGND
VLOAD+
U1
VOUT
CTIM
J2
PGOOD
TABLE 3. BILL OF MATERIALS, ISL6115AEVAL1Z
COMPONENT
DESIGNATOR
COMPONENT NAME
COMPONENT DESCRIPTION
U1
ISL6115A
Intersil
Q1
N-FET
11.5m, 30V, 11.5A Logic Level N-Channel Power MOSFET or equivalent
R1
Load Current Sense Resistor
WSL-2512 10m 1W Metal Strip Resistor
R2
Gate Stability Resistor
20 0603 Chip Resistor
R3
Overcurrent Voltage Threshold Set
Resistor
1.24k 0603 Chip Resistor (Vth = 24.8mV)
R4
PGOOD Pull up Resistor
10k 0603 Chip Resistor
C1
Gate Timing Capacitor
0.001µF 0402 Chip Capacitor (<2ms)
C2
IC Decoupling Capacitor
0.1µF 0402 Chip Capacitor
C3
Time Delay Set Capacitor
0.01µF 0402 Chip Capacitor (1ms)
J1
Bias Voltage Selection Jumper
Install if switched rail voltage is = +12V. Remove and provide separate
+12V bias voltage to U2 via VBIAS if ISL6116, ISL6117 or ISL6120 is
being evaluated.
J2
PWRON Disable
Install J2 to disable U2. Connects PWRON to GND.


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