GD3160 datasheet(49/114 Pages) NXP

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NXP Semiconductors

GD3160

Advanced IGBT/SiC gate driver

aaa-037335

Collector

Emitter

GND2

ISENSE

OCTH[2:0]

Over current

sense threshold

OCFILT[2:0]

Over current filter

Over current detect

Short circuit detect

SCTH[2:0]

SC Threshold level

comparator

SET

CLR

reset via SPI

tOC_FILT,

OC filter

0.5 to 4.0 µs

SCFILT[2:0]

SC filter time

SCFF[0]

SC “Fast filter mode

(reported via INT

and SPI,

forces soft shutdown)

2LTOen

(activates 2LTO)

SET

CLR

reset via SPI

tSC_FILT,

SC filter

0.1 to 1.1 µs

t2LTO_FILT,

2LTO deglitch

filter

fixed 40 ns

OCTH 0.25 to 2.0 V

SCTH 0.5 to 3.0 V

Figure 17. Short-circuit and overcurrent detection block diagram

Implementing short-circuit and overcurrent protection with this circuitry is fairly straightforward. R1, R2, SCTH,

and OCTH are selected based on the IGBT's current sense ratio and the desired SC and OC fault thresholds.

The SC and OC fault thresholds are set to less than the IGBT's expected VCE(sat).

The circuit responds differently to a short-circuit versus an overcurrent fault. If the short-circuit comparator

trips for longer than t2LTO_FILT, the GD3160 initiates a 2LTO by immediately reducing the IGBT's VGE to a lower

value. If the comparator remains tripped for a programmable duration (tSC_FILT), then the fault is latched and the

IGBT is turned off by the SSD circuitry. If the comparator does not remain tripped, the gate-drive transistor GH

turns on once again and returns VGE to its normal on-state voltage. For full short-circuit protection performance,

enabling both 2LTO and SSD is recommended to achieve the described operation.

GD3160

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 13 — 6 May 2024

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