Datasheet 1EDBx275F (Infineon) - 7

EiceDRIVER™ 1EDBx275F Single-channel isolated gate-driver ICs in 150 mil DSO package Functional description
ideal switch. The p-channel sourcing transistor enables real rail-to-rail behavior without suffering from the voltage drop unavoidably associated with nMOS source follower stages. In case of floating inputs or insufficient supply voltage not exceeding the UVLO thresholds, the driver output is actively clamped to the "low" level (GNDO).
2.4 Output active clamping
The Undervoltage Lockout (UVLO) ensures no driver operation for supplies below the UVLO thresholds. However, this is not sufficient to guarantee that the output of the driver is kept low. Transient-induced current on the MOSFETs side may pull-up the output node of the driver and the gate voltage causing an unwanted turn-on of the switch; this is particularly critical in systems using bootstrapping since, during start-up, the supply of the high- side channel is delayed, while the low-side MOSFETs is already switching. In resonant topologies (as LLC), the half-bridge switching node may be pulled up after the turn-off of the low-side switch. When this is turned on again, the dv/dt induced increase of the high-side gate voltage cannot be clamped by the drivers RDSON,sink if the the boostrap supply is not yet available. With a fast active clamping circuit in the output stage, EiceDRIVER™ 1EDBx275F ensures safe operation in all UVLO situations. This structure allows fast reaction and effective clamping of the output pins (OUT). The exact reaction time depends on the output supply (VDDO) and on the output voltage levels; however, already for very low supply levels (~1 V), the active clamping is able to react in some tens of ns. Undervoltage Lockout together with the Output Active Clamping ensure that the output is actively held low in case of unsufficient output-side supply voltage.
Table 5 Logic table in case of insufficient supply voltages Inputs Supplies Output INx V DDI V DDO OUT
x > UVLOVDDI,on 1.2 V < VDDO< UVLOVDDO,on L
2.5 CT communication and input to output data transmission
A coreless transformer (CT) based communication module is used for PWM signal transfer between input and output. A proven high-resolution pulse repetition scheme in the transmitter combined with a watchdog timeout at the receiver side enables recovery from communication fails and ensures safe system shutdown in failure cases. Final Data Sheet 7 Rev. 2.1 2021-04-21 Document Outline Description Table of Contents 1 Pin configuration and description 2 Functional description 2.1 Block diagram 2.2 Power supply and Undervoltage Lockout (UVLO) 2.2.1 Input supply voltage 2.2.2 Output supply voltage 2.2.3 Input stage 2.3 Driver output 2.4 Output active clamping 2.5 CT communication and input to output data transmission 3 Electrical characteristics and parameters 3.1 Absolute maximum ratings 3.2 Thermal characteristics 3.3 Operating range 3.4 Electrical characteristics 3.5 Isolation specifications 4 Timing diagrams 5 Layout recommendation 6 Application notes 6.1 Driving 600 V CoolGaNTM 6.2 Driving 650 V CoolSiCTM 7 Typical characteristics 8 Package outline dimensions 8.1 Device numbers and markings 8.2 Package PG-DSO-8 Revision history