Recom RPX-1.0-EVM-1 User manual

www.recom-power.com REV.: 0/2020 P-1
RPX-1.0-EVM-1
Evaluation Module
• Evaluation platform for RPX-1.0 buck regulator
module
• Thermal design considerations included
• EMI class B filter
• Easy evaluation of output voltage selection,
control, and sensing functions
Features
Evaluation
Module
Description
The RPX-1.0-EVM-1 generates a constant output voltage selectable from 0.8V, 1.8V, 3.3V,
5V, 12V, 15V, or 24V from a DC input in the range of 4-36V. It has a maximum continuous output
current of 1A.
All the functions of the RPX-1.0 such as output voltage selection, control, power good, trim, and output
sense can be readily evaluated. Also the behavior in overload or over-temperature can be evaluated
easily before it is designed in.
The evaluation board also contains the filter components to meet EMC class B levels. Alternate
component positions are included to allow experimentation to optimize the EMC performance depending
on operating conditions and budget.
Caution:
ESD sensitive. Always follow ESD preventative procedures when
handling the product!
Quick Start Guide
1. Connect P3 to power supply (observe correct polarity!)
2. Connect P4 to the load (no load operation is allowed. For 0.8Vout, please refer to safe
operating area in the RPX-1.0 datasheet)
3. The evaluation module is preset to 5Vout.
The output voltage can be selected with values of 0.8V, 1.8V, 3.3V, 5V, 12V, 15V, and 24V by
shorting a 0Wresistor to the respective places as seen in the board silkscreen. For 0.8Vout,
please refer to safe operating area in the RPX-1.0 datasheet.
4. The sense pin is connected to the RPX output pin, so the preset voltage is very accurate at
the output of the RPX. To compensate any losses of the filter, remove the resistor at R2, and
solder a 0Wresistor at R3.
5. CTRL
The device is preset as normally on. It can be disabled by pulling the CTRL pad to GND.
Short R18 to disable the device.
Selection Guide
Part
Number
Input Voltage
Range
[VDC]
Output
Voltage (1)
[VDC]
Output
Current max.
[A]
RPX-1.0-EVM-1 4 - 36 0.8, 1.8, 3.3, 5, 12, 15, 24 1
Notes:
Note1: refer to SAFE OPERATING AREA of RPX-1.0 datasheet

www.recom-power.com REV.: 0/2020 P-2
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
Pin Name Description
1 NC No Connection
2 NC No Connection
Pin Name Description
1 NC No Connection
2 NC No Connection
Pin Name Description
1 GND Common GND
2 VIN Positive Input Voltage (observe correct polarity!)
Pin Name Description
1 GND Common GND
2 VOUT Positive Output Voltage
Pin Name Description
1 GND Negative Input Voltage (GND)
2 VIN Positive Input Voltage
3 PGOOD Power Good Signal
4 VIN Positive Input Voltage
5 CTRL CTRL Pad (leave open if not used)
6 GND Negative Input Voltage (GND)
7 TRIM TRIM Pad (leave open if not used)
8, 9 SENSE Output Voltage Sense Pin (leave open if not used)
10 VOUT Positive Output Voltage
11 GND Negative Output Voltage (GND)
Connector Description
P3
P4
Pads Direct Connection
Component Placement
RPX-1.0-EVM-1
GND
1
2 10
11
9
3 4 5
VIN
GND
FOR EVALUATION ONLY
www.recom-power.com/eval-ref-boards
VOUT
SENSE
VOUT SELECT
VINPGOOD CTRL GND TRIM SENSE
4V to 36V 1A max.
P1
P3
1
1
2
2
P2
P4
L1
1
1
2
2
R4
R5
C12
U1
L3
L2
L4
L5
L6
L7
L8
L9
C1
C2
C3 C4 C5 C6
C7 C8 C9 C10
24V 15V 12V
5V
3.3V 1.8V 0.8V
R2
R20
R11 R10 R9 R8 R7 R6
C11
R3
R1
6 7 8
R21
R22R18
P1 (Not Mounted)
P2 (Not Mounted)

www.recom-power.com REV.: 0/2020 P-3
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
P3 2
1
L9 2220
L8 1206
L7 0805
GND
P4
PGOOD
2
1
GND
GND
CTRL
GND
GND
GND
TRIM
24V
15V
12V
5V
3.3V
1.8V
0.8V
SENSE
VOUT
VIN
SENSE
RPX-1.0
Vout Select
R20
C11C10C9C8C7
U1
R2
R11R10R9R8R7R6
R5
R4
R1
C12
C2C1
R18
R3
C3 C4 C5 C6
L2 1008
L4 0805
L5 1206
L6 2220
L3 RLS-397 L1
13
514, 15
16
2
4
3
1
12
6, 7, 8
9, 10, 11
Schematic
Description
U1: RPX-1.0 power module.
C1,C2,L1,L2,L3,L4,L5,L6,C3,C4,C5,C6: allow placement of various sized components to test input filter design. The populated filter is
designed to meet EN55022 class B.
C7,C8,C9,C10,L7,L8,L9,C11: allow placement of various sized components to test output filter design. The populated filter is designed to meet
EN55022 class B.
R1 and R18: configure CTRL. R1 is populated to enable the RPX-1.0. Short R18 in order to disable the RPX-1.0.
R2: populated 0Wresistor for direct output voltage measurement. If sense is desired at a different location, for example after the filter or
directly at the load, unsolder R2, and connect sense to the new measurement point.
R3: sense point for output voltage after the filter. To set sense point here, remove R2, and solder a 0Wresistor at R3.
VOUT selection: the output voltage can be selected with values of 0.8V, 1.8V, 3.3V, 5V, 12V, 15V, and 24V by shorting a 0Wresistor to the
respective places as seen in the board silkscreen.
R21, R22: trim the output voltage. Refer to “OUTPUT VOLTAGE TRIMMING”
Notes:
Note2: Gray colored components are not mounted

www.recom-power.com REV.: 0/2020 P-4
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
OUTPUT VOLTAGE TRIMMING
Voutset = 1.8V
Trim up Trim up
Trim up Trim up
Trim up Trim up
Trim down Trim down
Trim down Trim down
Trim down Trim down
Voutset = 1.7 1.6 1.5 1.44 [VDC]
Rdown (E96) ≈665k 294k 174k 133k [W]
Voutset = 3.1 3 2.8 2.64 [VDC]
Rdown (E96) ≈866k 549k 301k 210k [W]
Voutset = 4.7 4.5 4.3 4 [VDC]
Rdown (E96) ≈976k 549k 374k 237k [W]
Voutset = 11 10.6 10 9.6 [VDC]
Rdown (E96) ≈768k 523k 348k 274k [W]
Voutset = 14 13 12.5 12 [VDC]
Rdown (E96) ≈1M 453k 348k 280k [W]
Voutset = 23 22 20 19.2 [VDC]
Rdown (E96) ≈1M65 787k 357k 287k [W]
Voutset = 1.82 1.88 1.90 1.98 [VDC]
Rup (E96) ≈3M01 750k 604k 332k [W]
Voutset = 3.4 3.5 3.6 3.63 [VDC]
Rup (E96) ≈604k 301k 200k 182k [W]
Voutset = 5.1 5.2 5.3 5.5 [VDC]
Rup (E96) ≈604k 301k 200k 121k [W]
Voutset = 12.4 12.6 13 13.2 [VDC]
Rup (E96) ≈150k 100k 59k 49k9 [W]
Voutset = 15.5 16 16.3 16.5 [VDC]
Rup (E96) ≈121k 59k 45k3 39k2 [W]
Voutset = 25 25.5 26 26.4 [VDC]
Rup (E96) ≈59k 39k2 29k4 24k3 [W]
Voutset = 5V
Voutset = 15V
Voutset = 3.3V
Voutset = 12V
Voutset = 24V
RHI RLO Vref
60k5W75kW0.807VDC
Voutnom = nominal output voltage [VDC]
Voutset = trimmed output voltage [VDC]
Vref = reference voltage [VDC]
Rup = trim up resistor [kW]
Rdown = trim down resistor [kW]
RHI, RLO = internal resistors [kW]
Calculation:
The RPX-1.0 offers the feature of trimming the output voltage by using external trim resistors. The values for trim resistors are shown in trim
tables below according to E96 values; therefore, the specified voltage may slightly vary. Refer to “Selection Guide” for applicable Vout range.
Trim up
Voutset=5.1VDC Voutset=4VDC
Rup
+Vout
Trim
Rdown
GND
Trim
Trim down
Rup
+Vout
Trim
Rdown
GND
Trim
(R22) (R21)
Practical Example RPX-1.0, trim up: Practical Example RPX-1.0, trim down:
Rup =60k5W- 1k =605kW
5.1 - 5
Rup according to E96 ≈604kWRdown according to E96 ≈ 237kW
Rdown =(4 - 0.807) x 75kW= 239kW
5 - 4
Rdown =(Voutset - Vref) x RLO
Voutnom - Vset
Rup =RHI - 1k
Voutset - Vnom

www.recom-power.com REV.: 0/2020 P-5
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
Layout
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Dimension (LxWxH) 85.0 x 55.0 x 6.5mm
Weight 21.2g typ.
Notes:
Note3: Visit www.recom-power.com/eval-ref-boards to download the Gerber files
Top Layer
Layer 3
Layer 2
Bottom Layer
continued on next page
BOM
Comp. Description Manufacturer Part Number Manufacturer Remarks
C1 10nF 50V X7R 0603 CL10B103KB8NNNC Samsung Electro-Mechanics
C2 1µF 50V X7R 0805 CL21B105KBFNNNE Samsung Electro-Mechanics
C3 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics not mounted
C4 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics not mounted
C5 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
C6 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
C7 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics

www.recom-power.com REV.: 0/2020 P-6
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
Comp. Description Manufacturer Part Number Manufacturer Remarks
C8 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
C9 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
L10 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
L11 10µF 50V X7R 1210 CL32B106KBJNNWE Samsung Electro-Mechanics
L12 33pF 50V C0G 0603 CL10C330JB8NNNC Samsung Electro-Mechanics
L1 FERRITE BEAD BLM18PG330SN1D BLM18PG330SN1D Murata
L2 FERRITE BEAD 1008 not mounted
L3
I ND-3.9uH-1.32A-045x032x026 RLS-397 RECOM
L4 FERRITE BEAD 0805 not mounted
L5 FERRITE BEAD 1206 not mounted
L6 FERRITE BEAD 2220 not mounted
L7 FERRITE BEAD 600 OHM 0805 1LN 742792040 Wurth
L8 FERRITE BEAD 1206 not mounted
L9 FERRITE BEAD 2220 not mounted
P1 CONNECTOR XW4K-04A1-H1 Omron Electronics Inc not mounted
P2 CONNECTOR XW4K-04A1-H1 Omron Electronics Inc not mounted
P3 CONNECTOR 2060-452/998-404 Wago
P4 CONNECTOR 2060-452/998-404 Wago
R1 100kW 0.1W 1% 0603 RC0603FR-07100KL Yageo
R2 0R 0.1W 0603 RC0603JR-070RL Yageo
R3 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R4 100kW 0.1W 1% 0603 RC0603FR-07100KL Yageo
R5 75kW0.1W 1% 0603 RC0603FR-0775KL Yageo
R6 60k4W0.1W 1% 0603 RC0603FR-0760K4L Yageo
R7 24k3W 0.1W 1% 0603 RC0603FR-0724K3L Yageo
R8 14k3W 0.1W 1% 0603 RC0603FR-0714K3L Yageo
R9 5k36W 0.1W 1% 0603 RC0603FR-075K36L Yageo
R10 4k22W 0.1W 1% 0603 RC0603FR-074K22L Yageo
R11 2k61W 0.1W 1% 0603 RC0603FR-072K61L Yageo
R12 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R13 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R14 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R15 0R 0.1W 0603 RC0603JR-070RL Yageo
R16 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R17 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R18 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R19 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R20 1kW0.1W 1% 0603 RC0603FR-071KL Yageo
R21 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
R22 0R 0.1W 0603 RC0603JR-070RL Yageo not mounted
U1 RPX-1.0 MODULE RPX-1.0 RECOM

www.recom-power.com REV.: 0/2020 P-7
Evaluation Module
Specifications (measured @ Ta= 25°C, full load and after warm-up unless otherwise stated)
RPX-1.0-EVM-1
The
product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer.
The
products
are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or
cause
loss
of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the
unauthorized
use of RECOM products in such safety-critical applications.
• RPX-1.0-EVM-1 Evaluation Module
• Terms and Conditions
Contents
PACKAGING INFORMATION
Parameter Type Value
Packaging Dimension (LxWxH) 114.0 x 60.0 x 28.0mm
Packaging Quantity 1pc