AN4043 datasheet(20/60 Pages) STMICROELECTRONICS

20 / 60 page

Electrical characteristics and functions

AN4043

20/60

Doc ID 022726 Rev 2

Figure 12.

Timing chart of undervoltage lockout function

2.3.4

Dead time and interlocking function management

In order to prevent any possible cross-conduction between high-side and low-side IGBTs,

the SLLIMM-nano provides both the dead time and the interlocking function. The

interlocking function is a logic operation which sets both the outputs to low level when the

inputs are simultaneously active. The dead time function is a safety time introduced by the

device between the falling edge transition of one driver output and the rising edge of the

other output. If the rising edge set externally by the user occurs before the end of this dead

time, it is ignored and results as delayed until the end of the dead time.

The dead time is internally set at 320 ns as the typical value of the STGIPN3H60A.

Table 7.

Interlocking function truth table of the STGIPN3H60A

Condition

Logic input (VI)

Outputs

LIN

HIN

LVG

HVG

Interlocking

half bridge tri-state

0 “logic state”

half bridge tri-state

1 “logic state”

low-side direct driving

1 “logic state”

high-side direct driving

AN4043 Datasheet(PDF) 20 Page - STMicroelectronics