Infineon EVAL ISO 4DIR1400H Manuale utente

User Manual Please read the Important Notice and Warnings at the end of this document V 1.0

www.infineon.com/eval-iso-4dir1400h page 1 of 14 2023-03-06

UM_2208_PL21_2209_160608

EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

About this document

Scope and purpose

This document introduces the Infineon ISOFACE™ quad-channel digital isolators and describes how to evaluate

their performance by using the evaluation board EVAL_ISO_4DIR1400H.

Intended audience

This document is intended for design engineers who want to design high-voltage (HV) applications with

Infineon digital isolators for isolation purposes.

Table of contents

About this document....................................................................................................................... 1

Table of contents............................................................................................................................ 1

1Introduction to Infineon ISOFACE™ quad-channel digital isolators .............................................. 2

2Evaluation board EVAL_ISO_4DIR1400H ................................................................................... 3

2.1 Board layer stack.....................................................................................................................................4

2.2 Board schematic......................................................................................................................................4

2.3 Board layout............................................................................................................................................6

3Functional description............................................................................................................ 7

3.1 Connections.............................................................................................................................................7

3.1.1 Power connections ............................................................................................................................7

3.1.2 Signal connections.............................................................................................................................8

3.2 Configuration...........................................................................................................................................9

3.3 Operation and typical waveforms ........................................................................................................10

3.4 High-voltage capability.........................................................................................................................11

4Bill of materials.....................................................................................................................12

Revision history.............................................................................................................................13

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Introduction to Infineon ISOFACE™ quad-channel digital isolators

1Introduction to Infineon ISOFACE™ quad-channel digital

isolators

Isolation provides safety in HV applications and improves electrical noise immunity. To meet the continually

growing requirements for isolation products, Infineon Technologies offers ISOFACE™ quad-channel digital

isolators with the highest robustness, most accurate timing performance and lowest power consumption. This

product family, based on coreless transformer (CT) technology, uses two coils stacked on top of each other

with SiO2as insulation material in between, and has the following features:

•RoHS-compliant PG-DSO-16 wide-body 300 mil package

•High common-mode transient immunity, greater than 100 kV/µs

•Wide supply voltage range, from 2.7 to 6.5 V (absolute maximum 7.5 V)

•Accurate timing, with 26 ns typical propagation delay and -6/+7 ns spread

•Lower power consumption with maximum 6.2 mA at 3.3 V and 1 Mbps

•CMOS variable input thresholds

•Pin-to-pin compatible with all quad-channel digital isolator products in SOIC-16 wide-body package

(300 mil) available on the market

This digital isolator family includes the following product variants:

Table 1 Product variants in Infineon’s ISOFACE™ quad-channel digital isolator family

Part number

Channel configuration

Default

output state

Output

enable

Isolation rating

Package

4DIR0400H

4 forward 0 reverse (4+0)

Low

Active high

VISO = 5700 VRMS7

(UL1577 Ed. 5)

PG-DSO-16

300 mil

10.3 x 10.3 mm

4DIR0401H

High

4DIR1400H

3 forward 1 reverse (3+1)

Low

4DIR1401H

High

4DIR2400H

2 forward 2 reverse (2+2)

Low

4DIR2401H

High

4DIR1420H

3 forward 1 reverse (3+1)

Low

Active low

4DIR1421H

High

The target applications are:

•AC-DC converter in telecom and server power supply systems

•High-side floating pulse-width modulation (PWM) signal transfer for GaN with integrated power stage

(GaN-IPS)

•Isolated SPI communication

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Evaluation board EVAL_ISO_4DIR1400H

2Evaluation board EVAL_ISO_4DIR1400H

To make the evaluation of ISOFACE™ quad-channel digital isolators easier, Infineon offers the evaluation board

EVAL_ISO_4DIR1400H, as shown in Figure 1.

Figure 1 Evaluation board EVAL_ISO_4DIR1400H

This board is designed with a four-layer stack to achieve high EMC performance even at high data-speed

operation. Standard FR-4 class epoxy is used as the PCB material. For a more detailed stack specification,

please see chapter 2.1.

It comes with the digital isolator ISOFACE™ 4DIR1400H (3+1, CMOS input threshold, default output low) variant

assembled by default. But it can also be used to evaluate other product variants of the quad-channel digital

isolator family. However, they are not supplied with the board and must be ordered separately. The evaluation

board provides the following features:

•Support for high-speed probes to measure all power supply, input and output signals. The connectors are

not supplied with the board and must be assembled separately.

•Support for edge-mounted coaxial (SMA) connectors. The SMA connectors are not supplied with the board

and must be assembled separately.

•Easy accessibility of input and output pins, e.g., connection of additional filters, load, and pull-up and pull-

down resistors. The components must be assembled separately.

For a more detailed description of the features listed above, please see chapter 3.

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Evaluation board EVAL_ISO_4DIR1400H

2.1 Board layer stack

To achieve a low-EMI performance even at a high data rate of up to 40 Mbit/s, the board uses a four-layer PCB

design:

•Layer 1: high-speed layer

This layer is intended for high-speed signal traces, for example signal inputs and signal outputs.

•Layer 2: ground layer

One ground layer is placed in between to provide the shielding effect.

•Layer 3: power layer

This layer is intended for all power supply traces for the digital isolator.

•Layer 4: ground layer

As there are no low-speed signal traces available, this layer is designed as the ground layer for better

shielding.

The layer stacking is shown in Figure 2.

Figure 2 Layer stack of EVAL_ISO_4DIR1400H

2.2 Board schematic

The schematic of the evaluation board EVAL_ISO_4DIR1400H is provided in Figure 3.

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Evaluation board EVAL_ISO_4DIR1400H

Figure 3 Schematic of EVAL_ISO_4DIR1400H

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Evaluation board EVAL_ISO_4DIR1400H

2.3 Board layout

The layout of the evaluation board EVAL_ISO_4DIR1400H is provided in Figure 4. Please note that the isolation

barrier in the middle is placed in each layer and has a width of 8 mm. There are no traces, pads or vias placed

within this isolation barrier.

Top layer: high-speed signal

Layer 2: GND

Layer 3: VDD

Layer 4: GND

Figure 4 PCB layout of EVAL_ISO_4DIR1400H

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Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Functional description

3Functional description

3.1 Connections

The board offers two power supply connections (VDD1 and VDD2) and four input/output connections for the

dual-channel digital isolator 4DIR1400H.

3.1.1 Power connections

Figure 5 Power connections of EVAL_ISO_4DIR1400H

•Power connection VDD1

This connection provides the VDD supply for side 1 of the digital isolator. The operating supply voltage range

is 2.7 to 6.5 V. For this connection, there is one edge-mounted SMA connector (VDD1) and one terminal block

(VDD1_IN) available. To use the SMA connector, jumper R3 needs to be assembled. To measure the power

supply signal on side 1 with a high-speed probe, there is a header block (CON_VDD1) designed.

•Power connection VDD2

This connection provides the VDD supply for side 2 of the digital isolator. The operating supply voltage range

is 2.7 to 6.5 V. For this connection, there is one edge-mounted SMA connector (VDD2) and one terminal block

(VDD2_IN) available. To use the SMA connector, jumper R4 needs to be assembled. To measure the power

supply signal on side 2 with a high-speed probe, there is a header block (CON_VDD2) designed.

•Bypass capacitors for power supply

There are three bypass capacitors designed on each side of the digital isolator to reduce noise on the power

supply line. C8 and C10 (10 µF) are placed close to the terminal block to compensate for the long power

supply cable. C4, C7 and C3, C9 (100 nF and 1 µF) are placed directly next to the digital isolator so that a

stable VDD supply is guaranteed.

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Functional description

3.1.2 Signal connections

There are two signal connections for each side of the digital isolator planned: two input and two output

connections. Depending on which product variant is assembled on the board, there are different configurations

of input and output connections. Figure 6 gives an example using 3+1 digital isolator ISOFACE™ 4DIR1400H.

Figure 6 Signal connections of EVAL_ISO_4DIR1400H

•Signal connections IA, IB, IC and ID

For a 3+1 digital isolator they are the inputs of channels A to D. Inputs A, B and C are on the left side. Input D

is on the right side. There is one edge-mounted SMA connector (IA, IB, IC and ID) and one terminal block

(CON_IA, CON_IB, CON_IC and CON_ID) available for each data channel. To use the SMA connector, jumper

R12, R16, R31 and R44 must be assembled. CON_IA, CON_IB, CON_IC and CON_ID can also be used to

connect the high-speed probe for monitoring.

•Signal connections OA, OB, OC and OD

For a 3+1 digital isolator they are the outputs of channels A to D. Outputs A, B and C are on the right side.

Output D is on the left side. There is one edge-mounted SMA connector (OA, OB, OC and OD) and one

terminal block (CON_OA, CON_OB, CON_OC and CON_OD) available for each data channel. To use the SMA

connector, jumper 21, R22, R33 and R42 must be assembled. CON_OA, CON_OB, CON_OC and CON_OD can

also be used to connect the high-speed probe for monitoring.

•Signal connections JP_EN1 and JP_EN2

The quad-channel digital isolator has one enable input signal on each side, which is used to enable the

output signals.

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Functional description

3.2 Configuration

As shown in Figure 7, to ease the evaluation, the input and output connections of each data channel of the

digital isolator can be configured individually: for example, impedance match, load and pull-up/-down

possibility.

Figure 7 Additional configuration of EVAL_ISO_4DIR1400H

•Each data channel (A, B, C and D) has three pull-down resistors and one pull-up resistor on each side (input

and output). Together with the jumpers for SMA connectors (R15, R16, R31 and R33 on the left side, R21, R22,

R42 and R44 on the right side), impedance matching can be made individually for input and output.

•Input filter capacitors (C1, C2, C12 and C13) can be assembled for each input data channel.

•Output load capacitors (C5, C6, C11 and C14) can be assembled for each output data channel.

•Terminal blocks CON_IA, CON_IB, CON_IC, CON_ID, and CON_OA, CON_OB, CON_OC, CON_OD are designed

to conveniently short the input/output channels to VDD or GND if required. They can also be used as signal

input/output terminals.

•Jumpers EN1 and EN2 are designed to input the enable signals for each side. They can be easily shorted to

GND or pulled up to VDD.

•Jumpers R23 and R24 are used to connect ground layers 2 and 4.

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EVAL_ISO_4DIR1400H user manual

Evaluation board for Infineon ISOFACE™ quad-channel digital isolators

Functional description

3.3 Operation and typical waveforms

Figure 8 shows the the typical configuration to operate the evaluation board EVAL_ISO_4DIR1400H using two

isolated DC power supplies.

Figure 8 Typical operation of EVAL_ISO_4DIR1400H

Figure 9 shows the input and output waveforms of both channels measured at 200 kHz and 1 MHz PWM.

VDD1 = VDD2 = 3.3 V

Red: CH1 and CH2 input PWM at 1 MHz

Yellow: CH1 output

Blue: CH2 output

Timescale: 500 ns/div

VDD1 = VDD2 = 3.3 V

Red: CH3 and CH4 input PWM at 1 MHz

Yellow: CH3 output

Blue: CH4 output

Time scale: 500 ns/div

Figure 9 Typical input and output waveforms of EVAL_ISO_4DIR1400H

Indice

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