AN3338 datasheet(22/72 Pages) STMICROELECTRONICS

22 / 72 page

Electrical characteristics and functions

AN3338

22/72

Doc ID 18441 Rev 4

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 provides both the dead time and the interlocking functions. 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 STGIPS10K60A.

Figure 13. Timing chart of undervoltage lockout function

Time

RESET

Circuit state

SET

RESET

VCC_thON

VCC_thOFF

HIN/LIN

Table 7. Interlocking function truth table of STGIPS10K60A

Condition

Logic input (VI)

Outputs

LIN

HIN

LVG

HVG

Interlocking

half bridge tri-state

0 “logic state”

half bridge tri-state

LLLL

1 “logic state”

low side direct driving

1 “logic state”

high side direct driving

AN3338 Datasheet(PDF) 22 Page - STMicroelectronics