EVAL1ED44173N01BTOBO1

AN2020-09 Low-side MOSFET driver with fast over-current protection (negative current sense) and fault/enable 1ED44173N01B Technical description About this document Scope and purpose This application note describes the features and key advantages of using Infineons 1ED44173N01B gate driver. This document will help the designer use the device within the recommended operating range by explaining how to select the current-sensing shunt resistor (R ), resistor and capacitor (RC) filter for overcurrent protection CS (OCP) and short-circuit protection (SCP), resistor and capacitor for fault clear time, and how to design the interfacing circuitry with the controller. A simple adapter board to evaluate 1ED44173N01B and the test result of the adapter board for one PFC demo board are also included. This application note provides detailed information to help speed up design time and avoid circuit problems that can occur due to incorrect usage of the driver. Intended audience This document is intended for people and designers who are looking to reduce their system cost and space while increasing the power density of their design with 1ED44173N01B. Ordering information Base Part Number Package Standard Pack Orderable Part Number Form Quantity EVAL Boxed 1 EVAL1ED44173N01BTOBO1 EVAL-1ED44173N01B 1ED44173N01B PG-SOT23-6 Tape and Reel 3000 1ED4473N01BXTSA1 IPW65R045C7 PG-TO 247-3 Tube 240 IPW65R045C7FKSA1 Application Note Please read the Important Notice and Warnings at the end of this document V1.1 www.infineon.com/gdlowside 2020-06-16 L ow-side MOSFET driver with fast over-current protection (negative current sense) and fault/enable P1EroDd44uc1t 73ovNe01rvieB Twec hnical description Table of Contents About this document ....................................................................................................................... 1 Table of Contents ........................................................................................................................... 2 1 Product overview .......................................................................................................... 3 1.1 Internal block diagram and features ...................................................................................................... 3 1.2 The detailed features and integrated functions of 1ED44173N01B ...................................................... 3 1.2.1 Features .............................................................................................................................................. 3 1.2.2 Functions ............................................................................................................................................ 3 1.3 Maximum electrical ratings ..................................................................................................................... 4 1.4 Description of the input and output pins ............................................................................................... 4 1.5 Outline drawings ..................................................................................................................................... 6 2 Interface circuit and layout guide .................................................................................... 7 2.1 Input/Output signal connection ............................................................................................................. 7 2.2 General interface circuit example ........................................................................................................... 9 2.3 Recommended layout pattern for overcurrent protection (OCP) & short-circuit protection (SCP) functions ................................................................................................................................................ 10 2.4 Recommended wiring of the bypass capacitors .................................................................................. 10 2.5 Recommended PCB layout ................................................................................................................... 11 3 Protection features ....................................................................................................... 12 3.1 Undervoltage lockout protection (UVLO) ............................................................................................. 12 3.2 Overcurrent protection (OCP) ............................................................................................................... 14 3.2.1 Timing chart of OCP ......................................................................................................................... 14 3.2.2 Selecting R ..................................................................................................................................... 15 CS 3.2.3 OCP delay time ................................................................................................................................. 15 3.3 Fault output circuit and fault clear time setup .................................................................................... 17 3.4 Enable input circuit ............................................................................................................................... 18 4 Driving capability ......................................................................................................... 20 4.1 I and I ................................................................................................................................................ 20 O+ O- 5 EVAL-1ED44175N01B adapter board................................................................................ 21 5.1 The evaluation of 1ED44173N01B on the PFC board ........................................................................... 22 5.1.1 The connection between the adapter board and PFC board ......................................................... 22 5.1.2 Normal operation ............................................................................................................................. 23 5.1.3 OCP ................................................................................................................................................... 23 5.1.4 Short PFC inductor test .................................................................................................................... 24 6 Recommended related products ..................................................................................... 25 7 References ................................................................................................................... 27 8 Revision history ............................................................................................................ 28 Application Note 2 V1.1 www.infineon.com/gdlowside 2020-06-16