HELIX MxC 200, MxC 270, MxC 271, MxC 273 User Manual

11.5.18

MxC™ 200 TL EVB Manual

48V to ±12V & 5Vreg Transformerless Isolation PoE 48V to ±12V & 5Vreg Transformerless Isolation

P/N: MxC 273C-EB-1 P/N: MxC 274C-EB-1

48V to 12V Transformerless Isolation 5V to 5V TL Tranformerless Isolation

P/N: MxC 270C-EB-1 P/N: MxC 271C-EB-1

Future Product

MxC™ 200 Evaluation Boards

Helix Semiconductors offers three MxC 200
DC-DC TL (Transformerless Isolation)
Evaluation Board configurations: 10W 48V
to isolated unregulated 12V output, 5W 5V
to isolated unregulated 5V output and 5W
48V to isolated unregulated ±12V and
regulated 5V output. Each evaluation board
is self-contained and ready for use.

Wiring connection diagram, schematic and
BOM for each board are included in this
manual. Gerber files are available upon
request.

Target Applications

 PoE: Wireless Access Points, Security

Cameras, VoIP Phones

 Electric & Hybrid Automobiles
 Industrial Controllers, HVAC
 Industry 4.0 Peripherals
 IoT & IIoT Gateways

Features

 Three Isolated Configurations

o 10W 48V to 12V Output
o 5W 5V to 5V Output
o 5W 48V to ±12V/5Vreg

Outputs

 90% Efficiency @ 5W
 85% Efficiency @ 10W
 Highest Power Density
 Low profile board module
 All SMD manufacture
 Adjustable On-Board Oscillator
 Fault Detectors

o Output Over-Current
o Thermal Shutdown

 External Control Signals

o Enable
o External Clock Enable
o External Clock Input

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MxC™ 200 TL EVB Manual

1. Table of Contents

1. Table of Contents..................................................................................................................... 2

2. Table of Figures ....................................................................................................................... 2

3. Table of Tables ......................................................................................................................... 3

4. MxC 270 48V to 12V Output TL EVB ........................................................................................ 4

5. MxC 271 5V to 5V Output TL EVB ............................................................................................ 9

6. MxC 273 48V to ±12V & +5V Buck Reg. Output EVB ............................................................. 14

9. Output Current Sharing ......................................................................................................... 20

10. Performance Data .................................................................................................................. 21

10.1. Operational Guidelines .................................................................................................. 21

11. Flying Capacitor Value Verses Efficiency ............................................................................... 22

2. Table of Figures

Figure 1: MxC 270 48V to 12V Output TL EVB Block Diagram ........................................................ 4

Figure 2: MxC 270 48V to 12V Output TL EVB Standalone Wiring Diagram................................... 4

Figure 3: MxC 270 48V to 12V Output TL EVB Test Wiring Diagram .............................................. 5

Figure 4: MxC 270 48V to 12V Output TL EVB Schematic .............................................................. 6

Figure 5: MxC 270 48V to 12V Output TL EVB Efficiency Curve .................................................... 8

Figure 6: MxC 271 5V to 5V Output TL EVB Block Diagram ............................................................ 9

Figure 7: MxC 271 5V to 5V Output TL EVB Standalone Wiring Diagram ....................................... 9

Figure 8: MxC 271 5V to 5V Output TL EVB Test Wiring Diagram ................................................ 10

Figure 9: MxC 271 5V to 5V Output TL Output EVB Schematic .................................................... 11

Figure 10: MxC 271 5V to 5V Output TL Output EVB Efficiency Curve ......................................... 13

Figure 11: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Block Diagram ................................. 14

Figure 12: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Standalone Wiring Diagram ........... 14

Figure 13: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Test Wiring Diagram ....................... 15

Figure 14: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Schematic ....................................... 19

Figure 15: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Efficiency Curve .............................. 19

Figure 16: MxC 270 Output Current Sharing 20W 48V-to12V TL EVB .......................................... 21

Figure 17: Efficiency Measurement Wiring Diagram .................................................................... 22

Figure 18: Typical Capacitance verses DC Bias, 50V Device ......................................................... 23

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MxC™ 200 TL EVB Manual

3. Table of Tables

Table 1: MxC 270 48V to 12V Output TL EVB Connector – J1 and J2 ............................................. 5

Table 2: MxC 270 48V to 12V Output TL EVB Bill of Materials (BOM) ........................................... 7

Table 3: MxC 271 5V to 5V Output TL EVB Connector – J1 and J2 ............................................... 10

Table 4: MxC 271 5V to 5V Output TL EVB Bill of Materials (BOM) ............................................. 12

Table 5: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Connector – J1 and J2 ........................ 15

Table 6: MxC 273 48V to ±12V & +5Vreg. Output TL EVB Bill of Materials (BOM) ...................... 17

Table 7: Revision History ............................................................................................................... 23

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MxC™ 200 TL EVB Manual

4. MxC 270 48V to 12V Output TL EVB

The MxC 270C-EB-1 48V to 12V Output TL (Transformer less Isolation) EVB is a standalone
isolated Divide-By-4 voltage reducer (Figure 2). The EVB is configured for 10W operation. A 4W
configuration is provided (see Figure 4) using cheaper, smaller components.

Isolation is provided via the isolation barrier capacitors. Different types of capacitors are to be
used depending on the required equipment safety classification. The 1.5KV capacitors used for
10W operation are not Y1/Y2 safety rated. Safety rated film capacitors can be substituted as
required. The 4W TL EVB configuration references Y2 safety rated MLCC capacitors.

The MxC 270 48V to 12V Output TL EVB provides the highest power density for an isolated 12V
output configuration. Additionally, a low-profile module can be manufactured using all SMD
components.

Figure 1: MxC 270 48V to 12V Output TL EVB Block Diagram

Figure 2: MxC 270 48V to 12V Output TL EVB Standalone Wiring Diagram

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MxC™ 200 TL EVB Manual

Pin No.

Name

Description

J1-1

VIN

+48VDC Input Power Pin

J1-2

GND

Power GND Pin

J2-1

IVOUT

Isolated unregulated +12VDC Output Power Pin

J2-2

IGND

Isolated Power GND Pin

Warning: Do not “Hot-Plug” the power supply or electronic load.

Recommended start-up procedure:

1) With power supply turned off, attach power supply wires.

2) With electronic load disabled (monitor mode), attach electronic load wires.

3) Turn on power supply.

4) Enable electronic load with no load current, and then ramp up load current.

Note:

Figure 3: MxC 270 48V to 12V Output TL EVB Test Wiring Diagram

Table 1: MxC 270 48V to 12V Output TL EVB Connectors – J1 and J2

1) Due to board’s small size, thermal dissipation is limited and may exceed the over-

temperature shutdown threshold.

2) The MxC 270 can be powered from 24V delivering 6Vout.

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MxC™ 200 TL EVB Manual

Figure 4: MxC 270 48V to 12V Output TL EVB Schematic

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MxC™ 200 TL EVB Manual

Qty

Ref. No.

Description

Package

Manufacturer

2

C4, C15

CAP, 0.1µF±10%, 50V

0603
1608 Metric

Wurth Elektronik
WCAP-CSGP 885012206095

2

C5, C16

CAP, 4.7µF±10%, 35V

0603
1608 Metric

TDK
C1608X5R1V475M080AC

4

C3A, C3B,
C8, C10

CAP, 10µF±10%, 50V

1210
3225 Metric

TDK
C3225X7S1H106M250AB

4

C11, C12,
C13, C14

CAP, 22µF±10%, 35V

1206
3216 Metric

TDK
C3216X5R1V226M160AC

2

C9, C17

CAP, 0.22µF±10%, 100V

0805
2012 Metric

TDK
C2012X7S2A224K085AE

4

C1A, C1B,
C2A, C2B

CAP, 4.7µF±10%, 100V

1210
3225 Metric

TDK
C3225X7S2A475M200AB

1

R6

RES, 10KΩ±10%

0603
1608 Metric

Rohm
ESR03EZPJ103

2

R1, R3

RES, 100KΩ±10%

0603
1608 Metric

Rohm
ESR03EZPJ104

1

R2

RES, 178KΩ±1%

0603
1608 Metric

Rohm
MCR03ERTF1783

1

R4

RES, 402KΩ±1%

0603
1608 Metric

Rohm
MCR03ERTF4023

1

R5

NC

4

D1, D2,
D3, D4

DIODE, SCHOTTKY

SOD-123W

Taiwan Semiconductor
TSSW3U60

1

LED1

LED, Blue

0603
1608 Metric

Visual Communications
VAOL-S6SB4

2

U1, U2

IC, MxC 200, QFN5x5, 32P 0.5

QFN32

Helix Semiconductors
MxC 200C-QFN32-1

2

J1,J2

CONN, 2P, M, R/A, 0.100

SIP100P2

Wurth Elektronik
WR-PHD 61300211021

2

L1, L2

IND, 4.7uH

7.3mm x

6.60mm

Wurth Electronik
WE-LHMI 74437346047

2

C6, C7

CAP, 0.15uF, 1.5KV

2220
5750 Metric

Knowles Syfer
2220Y150154KXTWS2

Table 2: MxC 270 48V to 12V Output TL EVB Bill of Materials (BOM)

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