Application NoteInfineon

Non-isolated Bidirectional Synchronous Buck Converter Evaluation Board (EVAL_BIDI_HB_1EDN7550B)

Evaluation board featuring the 1EDN7550B gate driver with truly differential inputs (TDI) for bidirectional buck-boost conversion in low-voltage applications up to 84V.

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Overview

This application note describes the EVAL_BIDI_HB_1EDN7550B evaluation board, designed to demonstrate the Infineon 1EDN7550B EiceDRIVER gate driver with truly differential inputs (TDI). The board operates as a non-isolated bidirectional synchronous buck/boost converter, utilizing BSC093N15NS5 OptiMOS MOSFETs and an XMC1100 microcontroller for digital control and communication. It supports input voltages up to 50V in buck mode and provides a reference design for low-voltage power stages such as brick converters and synchronous rectifiers. The document includes technical specifications, hardware setup instructions, performance characteristics, schematics, and a complete bill of materials.

Use Cases

Low-voltage (LV) power supplies up to 84V bulk voltage
Brick converters
Full-bridge synchronous rectifiers
Half-bridge and full-bridge power stages
SMPS digital control evaluation

Topics

1EDN7550B

EiceDRIVER

Truly Differential Input

TDI

BSC093N15NS5

XMC1100

Bidirectional Buck Converter

Synchronous Rectification

Gate Driver

OptiMOS

SMPS

EVAL_BIDI_HB_1EDN7550B

Referenced Parts

BAS16-03W

Infineon

BS-channel MOSFET and BAS16-03W diode are the external components needed by the IFX80471SK V controller.

BAT165

Infineon

BAT54-04 and BAT165 electrostatic discharge (ESD), overvoltage and reverse voltage protection.

BAT54-04

Infineon

BAT54-04 and BAT165 electrostatic discharge (ESD), overvoltage and reverse voltage protection.

BSC093N15NS5

Infineon

OptiMOS™ 150 V 9.3 mΩ (BSC093N15NS5) in SuperSO8 package as a power MOSFET

BSP321P

Infineon

BSP321P P-channel SIPMOS small-signal-transistor

IFX20002MBV33

Infineon

The IFX20002MB V33 is a low-dropout (LDO) regulator that supplies the microcontroller with 3.3 V.

IFX80471SKV

Infineon

The IFX80471SK V buck controller is used to generate 12 V out of the input voltage.

GST60A12-P1J

Mean Well

Boost mode 12 V DC power supply MEAN WELL GST60A12-P1J

GST60A48-P1J

Mean Well

Buck mode 22 to 48 V DC power supply MEAN WELL GST60A48-P1J

TSM-104-01-F-DH-A

Samtec

TSM-104-01-F-DH-A Female header, eight contacts

BSC026N08NS5

Infineon

Choose MOSFETs that have a lower RDS(on) and a lower voltage rating, such as the BSC026N08NS5.

5004

Keystone Electronics

5004 Test point THT, yellow

1935776

Phoenix Contact

Pin header, two contacts ... Farnell 1641934 ... CON-TER-THT-1935776

BAS16

Infineon

Infineon BAS16-

BAT54-04

Infineon

Schottky diode SOT23R Infineon BAT54-04

BSP321P

Infineon

Infineon BSP321P

1EDN7550B

Infineon

EiceDRIVER™ 1EDN TDI (1EDN7550B) with 4 V undervoltage lockout (UVLO) as HB LS and HS drivers

XMC1100-Q024F0064

Infineon

XMC1100-Q024F 0064 AA

CAP0603W

Infineon

QFN50P400X4 | 00X90-25N | Infineon | 2 C9, C10 1 μF Unpolarized capacitor CAP0603W | 2 C25, C28 2.2

00X90-25N

Infineon

M0/PG-VQFN-24-19 | QFN50P400X4 | 00X90-25N | Infineon | 2 C9, C10 1 μF Unpolarized capacitor CAP0603W

BSC093N

Infineon

Infineon BSC093N

SOT23R

Infineon

Schottky diode SOT23R Infineon BAT54-04

BAS16-03W	Infineon	BS-channel MOSFET and BAS16-03W diode are the external components needed by the IFX80471SK V controller.
BAT165	Infineon	BAT54-04 and BAT165 electrostatic discharge (ESD), overvoltage and reverse voltage protection.
BAT54-04	Infineon	BAT54-04 and BAT165 electrostatic discharge (ESD), overvoltage and reverse voltage protection.
BSC093N15NS5	Infineon	OptiMOS™ 150 V 9.3 mΩ (BSC093N15NS5) in SuperSO8 package as a power MOSFET
BSP321P	Infineon	BSP321P P-channel SIPMOS small-signal-transistor
IFX20002MBV33	Infineon	The IFX20002MB V33 is a low-dropout (LDO) regulator that supplies the microcontroller with 3.3 V.
IFX80471SKV	Infineon	The IFX80471SK V buck controller is used to generate 12 V out of the input voltage.
GST60A12-P1J	Mean Well	Boost mode 12 V DC power supply MEAN WELL GST60A12-P1J
GST60A48-P1J	Mean Well	Buck mode 22 to 48 V DC power supply MEAN WELL GST60A48-P1J
TSM-104-01-F-DH-A	Samtec	TSM-104-01-F-DH-A Female header, eight contacts
BSC026N08NS5	Infineon	Choose MOSFETs that have a lower RDS(on) and a lower voltage rating, such as the BSC026N08NS5.
5004	Keystone Electronics	5004 Test point THT, yellow
1935776	Phoenix Contact	Pin header, two contacts ... Farnell 1641934 ... CON-TER-THT-1935776
BAS16	Infineon	Infineon BAS16-
BAT54-04	Infineon	Schottky diode SOT23R Infineon BAT54-04
BSP321P	Infineon	Infineon BSP321P
1EDN7550B	Infineon	EiceDRIVER™ 1EDN TDI (1EDN7550B) with 4 V undervoltage lockout (UVLO) as HB LS and HS drivers
XMC1100-Q024F0064	Infineon	XMC1100-Q024F 0064 AA
CAP0603W	Infineon	QFN50P400X4 \| 00X90-25N \| Infineon \| 2 C9, C10 1 μF Unpolarized capacitor CAP0603W \| 2 C25, C28 2.2
00X90-25N	Infineon	M0/PG-VQFN-24-19 \| QFN50P400X4 \| 00X90-25N \| Infineon \| 2 C9, C10 1 μF Unpolarized capacitor CAP0603W
BSC093N	Infineon	Infineon BSC093N
SOT23R	Infineon	Schottky diode SOT23R Infineon BAT54-04