Datasheet


PI5101-EVAL1
μRDS(on) FETTM Series
PI5101-EVAL1 3.3V/60A High Side Active ORing
Evaluation Board User Guide
μRDS(on)FET™ Series
Content
Page
Introduction ........................................................... 1
Product Description ................................................ 2
Schematic ............................................................... 3
Bill of Material ........................................................ 4
Test Procedure: ...................................................... 5
Recommended Material and
Test Equipment ...................................................... 5
Test set-up configuration ....................................... 5
PCB Layout.............................................................. 9
Mechanical Drawing ............................................. 11
The PI5101-EVAL1 Evaluation Board is intended to
acquaint the user with the benefits and features of the
μRDS(on)FET™ PI5101 in a full function Active ORing
solution. It is not designed to be installed in end-use
equipment.
Please read this document before setting up the PI5101EVAL1 Evaluation Board and refer to the PI2001 and
PI5101 product datasheets for device specifications,
functional description and characteristics.
PI5101-EVAL1 Evaluation Board
featuring the μRDS(on) FETTM PI5101
During operation, the power devices and surrounding
structures can be operated safely at high temperatures.
Remove power and use caution when connecting and
disconnecting test probes and interface lines to avoid
inadvertent short circuits and contact with hot surfaces.
When testing electronic products always use approved
safety glasses. Follow good laboratory practice and
procedures.
Introduction
The PI5101-EVAL1 allows the user to test the basic
principles and operational characteristics low voltage high
current Active ORing function in a redundant power
architecture, while also experiencing the benefits and the
value of the PI5101 ultra-low RDS(on) MOSFET. The PI5101EVAL1 evaluation board is configured to receive two
independent power source inputs, per a typical redundant
power architecture, through two Active ORing channels
that are combined to form a redundant power output.
Each channel contains a PI2001 controller and PI5101
MOSFET.
The PI5101-EVAL1 evaluation board is designed with
optimized PCB layout and component placement to
represent a realistic high density final design for an
embedded high side Active ORing solution for 3.3V Bus
Picor Corporation • picorpower.com
applications requiring up to 60A. This evaluation board is
intended as an easy and simple way to test the electrical
and thermal performance of the PI5101 ultra-low RDS(on)
MOSFET and PI2001 Active ORing controller.
Both dynamic and steady state testing of the PI5101 and
the PI2001 can be completed on the PI5101-EVAL1
evaluation board, in addition to using the key features of
the product. Dynamic testing can be completed under a
variety of system level fault conditions to check for
response time to faults.
This document provides basic instructions for initial startup and configuration of the evaluation board. Further
information on the functionality of the PI5101 and PI2001
can be found in the PI5101 and PI2001 product data
sheet.
PI5101-EVAL1 User Guide Rev 1.0
Page 1 of 12
Product Description
TM
The PI5101 μRDS(on)FET
solution combines a highperformance 5V, 360μΩ lateral N-Channel MOSFET in a
thermally enhanced high density 4.1mm x 8mm x 2mm
land-grid-array (LGA) package to enable world class
performance in the footprint area of an industry standard
SO-8 package. The PI5101 offers unprecedented figureof-merits for DC and switching application including
RDS(on) x QG, gate resistance (RG) and package inductance
(LDS) outperforming conventional Trench MOSFETs and
enabling very low loss operation.
Using the PI2001 controller with the PI5101 ultra-low
RDS(on) N-channel MOSFET provides very high efficiency
and low power loss during steady state operation. The
PI2001 controller provides an active low fault flag output
to the system during excessive forward current, light
load, reverse current, over-voltage, under-voltage, and
over-temperature fault conditions. The under-voltage
and over-voltage thresholds are programmable via an
external resistor divider.
The PI5101 LGA package is fully compatible with industry
standard SMT assembly processes.
Terminals Maximum Rating
Vin1, Vin2,
5V/60A
Vout
5V/60A
1,
2
Vaux1, Vaux2
-0.3V to 17.3V / 10mA
-0.3V to 17.3V / 40mA
Figure 1: PI5101-EVAL1 Evaluation Board (1.8” x 2.8”)
Terminal
Description
Vin1
Power source Input #1 or bus input designed to accommodate up to 60A continuous current.
Vin2
Power source Input #2 or bus input designed to accommodate up to 60A continuous current.
1
PI2001 (U1) Fault pin: Monitors U1 fault conditions.
2
PI2001 (U2) Fault pin: Monitors U2 fault conditions.
Vaux1
Auxiliary Input Voltage #1: supply PI2001 VC power. Vaux1 should be equal to Vin1 plus 5 V or higher. See details in
Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Vaux2
Auxiliary Input Voltage #2: supply PI2001 VC power. Vaux2 should be equal to Vin2 plus 5 V or higher. See details in
Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Vout
Output M1 and M2 MOSFETs drain connection: connect to the load high side.
Return Connection: Ten Gnd connections are available and are connected to a common point, the Ground plane. Input
Gnd
supplies Vin1, Vin2, Vaux1, Vaux2 and the output load at Vout should all be connected to their
respective local Gnd connection.
Table 1: PI5101-EVAL1 Evaluation Board Terminals Description
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 2 of 12
Schematic
S1
M1
C4
Not Installed
R1
8.45kΩ
PMEG3005EJ
D5
BZX384-B5V1
R3
7
13.3kΩ
D3
9
10
R5
2.00kΩ
Vaux1
D1
PI5101
Vin1
Vin1
Gnd
Gnd
Gnd
3
C6
Not Installed
2
GATE
SP
8
SN
4
OV
SL
R7
2.00kΩ
R11
10Ω
UV
Vout
Vout
C3
22μF
Gnd
Gnd
N/C
U1
PI2001
VC
C1
1μF
FT
BK
GND
5
1
6
FT1
R9
4.99kΩ
D1: LED
S2
M2
PI5101
Vin2
Vin2
C5
Not Installed
R2
8.45kΩ
PMEG3005EJ
D6
BZX384-B5V1
R4
7
13.3kΩ
D4
9
10
R6
2.00kΩ
Vaux2
UV
3
Vout
Vout
C7
Not Installed
2
8
GATE
SP
SN
4
OV
SL
R8
2.00kΩ
R12
10Ω
Gnd
Gnd
Gnd
D2
Gnd
Gnd
N/C
U2
PI2001
VC
C2
1μF
FT
BK
GND
5
1
6
FT2
R10
4.99kΩ
D2: LED
Figure 2: PI5101-EVAL1 Evaluation Board schematic.
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 3 of 12
Bill of Material
Item
QTY
Ref. Designator
Value/Part NO.
Description
Footprint
1
2
C1, C2
1μF
MLCC Capacitor, X5R, 1μF,16V
0603
2
2
C3
22μF
MLCC Capacitor, X5R, 22μF,25V
1210
3
4
C4, C5, C6, C7
Not Installed
4
2
D1, D2
LTST-C191CKT
5
2
D3, D4
6
2
D5, D6
7
10
D1, D2, 1, 2, Gnd,
S1, S2, Vaux1, Vaux2
8
16
Gnd, Vin1, Vin2, Vout
9
2
M1, M2
10
2
R1, R2
11
2
12
Manufacturer
1206
LED, Red
0603 LED
Lite-On
BZX384-B5V1,115
Zener Diode 5.1V 300mW
SOD323
NXP
PMEG3005EJ,115
Schottky Diode, ,30V,500mA
SOD323
NXP
1528
Turret Test point
TURRET - 1528
Keystone
Electronics
1502
Turret Test point
TURRET - 1502
Keystone
Electronics
N-MOSFET, 5V, 60A
3-Lead LGA
PICOR
8.45kΩ
Resistor, 8.45kΩ, 1%,0.1W
0603
R3, R4
13.3kΩ
Resistor,13.3kΩ, 1%, 0.125W
0603
4
R5, R6, R7, R8
2.00kΩ
Resistor, 2.00kΩ, 1%, 0.125W
0603
13
2
R9, R10
4.99kΩ
Resistor, 4.99kΩ,1%,0.1W
0603
14
2
R11, R12
10Ω
Resistor, 10Ω,1%,0.1W
0603
15
2
U1, U2
Picor Cool-ORing Controller IC
3x3mm 10L DFN
PI5101-00-LGIZ
PI2001-00-QEIG
PICOR
Table 2: PI5101-EVAL1 Evaluation Board Bill of Materials
Ref. Designator
Value/Part NO.
Functional Description
C1, C2,
1uF
VC Bypass Capacitor
C3
22uF
Output (Load) Capacitor
C4, C5, C6, C7
Not Installed
Snubber to reduce voltage ringing when the device turns off. Add the capacitors if long
harnesses are used to connect the power source or load to the board.
D1, D2
LTST-C191CKT
A fault is indicate exists when the LED is on
D3, D4
BZX384-B5V1,115
Zener diode clamps the gate voltage
D5, D6
PMEG3005EJ,115
Schottky Diode added to prevent current flow from Vin into the controller during gate
discharge
M1, M2
PI5101-00-LGIZ
PICOR ultra-low RDS(on) MOSFET
R1, R2
8.45kΩ
UV Voltage Divider Resistor ( R2UV as defined in section 2.1.2 and Figure 4)
R3, R4
13.3kΩ
OV Voltage Divider Resistor ( R2OV as defined in section 2.1.2 and Figure 4)
R5, R6,
2.00kΩ
UV Voltage Divider Resistor ( R1UV as defined in section 2.1.2 and Figure 4)
R7, R8
2.00kΩ
OV Voltage Divider Resistor ( R1OV as defined in section 2.1.2 and Figure 4)
R9, R10
4.99kΩ
LED current limit resistor, selected to operate from 12V.
R11, R12
10Ω
U1, U2
PI2001-00-QEIG
VC bias resistor added for noise filtering
PICOR Cool-ORing Active ORing Controller
Table 3: Component functional description
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 4 of 12
Test Procedure:
Initial Test Set Up
Baseline Test Procedure (Refer to Figure 3)
PI5101-EVAL1 is configured for a 3.3V redundant bus
application. Under-Voltage (UV) and Over-Voltage
(OV) voltage divider resistors are selected
appropriately for 3.3V nominal bus voltage. Refer to
section 2 on page 6 to calculate OV and UV resistor
values if another input voltage is desired. Both PI2001
controllers are configured as Master.
1.
Recommended Material and Test Equipment
1.1. Material Needed-Picor supplied
1.1.1. PI5101-EVAL1 evaluation board
1.1.2. PI5101 Product Datasheet
1.1.3. PI2001 Product Datasheet
1.2. Recommended Users Supplied Equipment
1.2.1. Two DC power supplies: 0-5V; 60A each.
1.2.2. One DC power supplies: 12V, 100mA
1.2.3. Load: Electronic Load, Power resistors or
actual load.
1.2.4. Multimeter.
1.2.5. Oscilloscope.
1.2.6. Appropriately sized interconnect cables.
1.2.7. Safety glasses.
+
+
PS1
DC
Electronic
Load
0-5V/60A
Logic PS
PS3
12V/100mA
+
60A
-
+
PS2
0-5V/60A
-
Figure 3: Test set-up configuration for a typical redundant power application using PI2001 and PI5101
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 5 of 12
Before initial power-up follow these steps to configure
the evaluation board for specific end application
requirement:
2.
3.
Auxiliary Power Supply (Vaux):
3.1. The PI2001 Controller has a separate input (VC)
that provides power to the control circuitry and
the gate driver. An internal voltage regulator
(VC) clamps the VC voltage to 15.5 V typically.
3.2. Connect independent power source to Vaux
inputs of PI5101-EVAL1 Evaluation Board to
supply power to the VC input. The Vaux voltage
should be 5V higher than Vin (redundant power
source output voltage) to fully enhance the
PI5101.
3.3. 10 Ω bias resistors (Rbias, reference designators
R11 and R12) are installed on the PI5101-EVAL1
between each Vaux input and VC pin of the
PI2001 controllers (U1 and U2).
3.4. If Vaux is higher than the Clamp voltage, 15.5 V
typical, the Rbias value has to be changed using
the following equations:
UV and OV resistors set up:
2.1. UV and OV programmable resistors are
configured for a 3.3V Vin (BUS voltage)
application in a two-resistor voltage divider
configuration as shown in Figure 4. UV is set to
2.6V and OV is set for 3.8V, R1OV and R1UV are
2.00KΩ 1%. If the PI5101-EVAL1 is required to
be used with a different Vin voltage application
please follow the following steps to change the
resistor values.
2.1.1. It is important to consider the maximum
current that will flow in the resistor
divider and maximum error due to UV and
OV input current.
Where:
2.1.2. Set
and
value based on system
allowable minimum current and 1% error;
: Vaux minimum voltage
: Maximum PI2001 VC Clamp Voltage (16V)
:
PI2001 maximum Quiescent Current (4.2mA)
Refer to PI2001 Datasheet for more details on Rbias.
4.
Where:
: UV threshold voltage
:
UV voltage set (0.5Vtyp)
:
current
: OV threshold voltage
:
OV voltage set (0.5Vtyp)
:
current
Vin
R2UV
U1/U2
UV
R1UV
PI2001
R2OV
FT
OV
R1OV
Ref. Desg.
R1UV
R2UV
R1OV
R2OV
V_Logic
FT
GND
U1
R5
R1
R7
R3
U2
R6
R2
R8
R4
Figure 4: UV & OV two resistor divider configuration
Picor Corporation • picorpower.com
Hook Up of the Evaluation Board
4.1. OV and UV resistors values are configured for a
3.3 V input. If you are using the evaluation board
at a different input voltage level you have to
adjust the resistor values by replacing R1, R2, R3
and R4, or remove R3, R4, R5 and R6 to disable
UV and OV function.
4.2. Please refer to the UV/OV section for details to
set R1, R2, R3 and R4 proper values.
4.3. Connect the positive terminal of PS1 power
supply to Vin1. Connect the ground terminal of
PS1 to its local Gnd. Set the power supply to 3.3
V. Keep PS1 output disabled (OFF).
4.4. Connect the positive terminal of PS2 power
supply to Vin2. Connect the ground terminal of
PS2 to its local Gnd. Set the power supply to 3.3
V. Keep PS2 output disabled (OFF).
4.5. Connect the positive terminal of PS3 power
supply to Vaux1 and Vaux2. Connect the ground
terminal of this power supply to Gnd. Set the
power supply to 12 V. Keep PS3 output disabled
(OFF).
4.6. Connect the electronic load to the output
between Vout and Gnd. Set the load current to
20 A.
PI5101-EVAL1 User Guide Rev 1.0
Page 6 of 12
5.
6.
Initial Functional Test
5.1. Enable (turn ON) PS1 power supply output.
5.2. Turn on the electronic load.
5.3. Verify that the electronic load input voltage
reading is one diode voltage drop below 3.3 V.
5.4. Enable (turn ON) PS3 power supply output.
5.5. Verify that the electronic load voltage reading
increases to a few millivolts below 3.3 V. This
verifies that the MOSFET is in conduction mode.
5.6. LED D1 should be off. This verifies that there is
no fault condition.
5.7. Reduce PS1 output voltage to 2 V,
5.8. LED D1 should turn on, this verifies that the
circuit is in an under-voltage fault condition.
5.9. Increase PS1 output to 3.3 V, LED D1 should
turn off, then increase PS1 output to 4 V, LED
D1 should turn on indicating an over-voltage
fault condition
5.10. Verify that Vin2 is at 0V. This verifies that the
PI2001 (U2) MOSFET (M2) is off.
5.11. Enable (turn ON) PS2 output.
5.12. Verify that both PS1 and PS2 are sharing load
current evenly by looking at the supply current.
Power supplies output may need adjustment to
set current sharing between the supplies.
5.13. Disable (turn OFF) PS1, PS2 and PS3 outputs.
5.14. Enable (turn ON) PS2 output then Enable PS3
output.
5.15. Verify that the electronic load voltage reading is
few millivolts below 3.3 V. This verifies that the
PI2001 (U2) MOSFET (M2) is in conduction
mode.
5.16. LED D2 should be off. This verifies that there is
no fault condition.
5.17. Reduce PS2 output voltage to 2 V,
5.18. LED D2 should turn on, this verifies that the
circuit is in an under-voltage fault condition.
5.19. Increase PS2 output to 3.3 V, LED D2 should
turn off, then increase PS2 output to 4 V, LED
D2 should turn on indicating an over voltage
fault condition.
5.20. Verify that Vin1 is at 0V. This verifies that the
PI2001 (U1) FET (Q1) is off.
PI5101 RDS(on) Measurement:
6.1. The PI5101 RDS(on) can be measured with a
voltmeter between the test point S1 and test
point D1 Kelvin connection for M1 and between
the test point S2 and test point D2 Kelvin
connection for M2. The potential between test
point S1 and test point D1 is Drain-to-Source
voltage difference of M1 and the RDS(on) is:
Picor Corporation • picorpower.com
Where:
:
:
Drain-to-Source voltage difference
Input current.
Note: The RDS(on) value is temperature dependent and the
junction
temperature
increases
directly
proportional to power dissipation.
7.
Input short circuit test:
PI2001 has a very fast response (160ns) to a reverse
current (Input short) fault condition. Measuring such
short period of event is critical and before the set-up is
completed, consider the following:
7.1. To emulate a real application, the BUS supplies
for this test should have a solid output source
such as a DC-DC converter that supplies high
current and can be connected very close to the
evaluation board to reduce stray parasitic
inductance. Or use the prospective supply
sources of the end application where the PI5101
and/or PI2001 will be used. Typical bench power
supplies have slow response to output load
change. In this test when the power supply
output is shorted and then released, the bench
power supply may produce high output voltage
with high current capability that may damage the
device under test.
7.2. Do not install Input capacitors (C4 and/or C5) in
this test.
7.3. Output capacitor (C3) should be installed.
7.4. Place the scope probes very close to the MOSFET
drain and source to measure Vout and Vin, and
make sure that the scope ground leads are very
short. You may use a close by ground pad for the
scope probe return, such as C4, C5, C6 and C7
Gnd pads.
7.5. Apply a short at one of the inputs (Vin1 or Vin2)
when both controllers (U1 and U2) are on, PS1,
PS2 and PS3 are enabled. The short can be
applied electronically using a MOSFET connected
between Vin and Gnd or simply by connecting
Vin to Gnd. Then measure the response time
between when the short is applied and the
MOSFET is disconnected (or turned off). An
example for PI2001 response time to an input
short circuit is shown in Figure 5.
PI5101-EVAL1 User Guide Rev 1.0
Page 7 of 12
Applied a Short
PI5101
turned off
Applied a Short
182ns
PI5101
Avalanche at 7V
Test Setup:
DUT: PI5101-EVAL1
Vin1 = 3.3V
Vin2 = 3.3V
Output Load = 20A
Test:
Both input sources are
turned on and sharing the
load current, then applied a
short with fast turn on 1mΩ
MOSFET between Vin1 and
Gnd.
Test purpose:
To show the PI2001 response
to a fault condition, where
the output of the input
source is shorted or tried to
source current from the load
(Vout)
Figure 5: Plot of PI2001 response time to reverse current detection
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 8 of 12
Figure 6: PI5101-EVAL1 layout top layer. Scale 2.0:1
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Figure 7: PI5101-EVAL1 layout mid layer 2. Scale 2.0:1
PI5101-EVAL1 User Guide Rev 1.0
Page 9 of 12
Figure 8: PI5101-EVAL1 layout mid layer 1. Scale 2.0:1
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Figure 9: PI5101-EVAL1 layout bottom layer 2. Scale 2.0:1
PI5101-EVAL1 User Guide Rev 1.0
Page 10 of 12
Figure 10: PI5101-EVAL1 evaluation board mechanical drawing
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 11 of 12
Warranty
Vicor products are guaranteed for two years from date of shipment against defects in material or
workmanship when in normal use and service. This warranty does not extend to products subjected to
misuse, accident, or improper application or maintenance. Vicor shall not be liable for collateral or
consequential damage. This warranty is extended to the original purchaser only.
EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, VICOR MAKES NO WARRANTY, EXPRESS OR LIMITED,
INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
Vicor will repair or replace defective products in accordance with its own best judgment. For service
under this warranty, the buyer must contact Vicor to obtain a Return Material Authorization (RMA)
number and shipping instructions. Products returned without prior authorization will be returned to the
buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all
reshipment charges if the product was defective within the terms of this warranty.
Information published by Vicor has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for inaccuracies. Vicor reserves the right to make changes to any products
without further notice to improve reliability, function, or design. Vicor does not assume any liability
arising out of the application or use of any product or circuit; neither does it convey any license under its
patent rights nor the rights of others. Vicor general policy does not recommend the use of its
components in life support applications wherein a failure or malfunction may directly threaten life or
injury. Per Vicor Terms and Conditions of Sale, the user of Vicor components in life support applications
assumes all risks of such use and indemnifies Vicor against all damages.
Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and
accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom
power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is
assumed by Vicor for its use. Vicor components are not designed to be used in applications, such as life
support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to
Vicor’s Terms and Conditions of Sale, which are available upon request.
Specifications are subject to change without notice.
Vicor Corporation
25 Frontage Road
Andover, MA 01810
USA
Picor Corporation
51 Industrial Drive
North Smithfield, RI 02896
USA
Customer Service: custserv@vicorpower.com
Technical Support: apps@vicorpower.com
Tel: 800-735-6200
Fax: 978-475-6715
Picor Corporation • picorpower.com
PI5101-EVAL1 User Guide Rev 1.0
Page 12 of 12