AN4043 datasheet(22/60 Pages) STMICROELECTRONICS

22 / 60 page

Electrical characteristics and functions

AN4043

22/60

Doc ID 022726 Rev 2

2.3.5

Comparators for fault sensing

The SLLIMM-nano STGIPN3H60 integrates one comparator intended for advanced fault

protection, such as overcurrent, overtemperature or any other type of fault measurable via a

voltage signal. The comparator has an internal reference voltage VREF, specified in the

datasheet, on its inverting input (see

Figure 9), while the non-inverting input is available on

the CIN pin. The comparator input can be connected to an external shunt resistor, in order to

implement a simple overcurrent or short-circuit detection function, as discussed in detail in

Section 2.3.6: Short-circuit protection and smart shutdown function.

Figure 13.

Timing chart of dead time function

LIN

HIN

LVG

HVG

LIN

HIN

LVG

HVG

LIN

HIN

LVG

HVG

LIN

HIN

LVG

HVG

DTLH

DTHL

DTLH

DTHL

DTLH

DTHL

DTLH

DTHL

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

CONTROL SIGNAL EDGES

OVERLAPPED:

INTERLOCKING + DEAD TIME

CONTROL SIGNALS EDGES

SYNCHRONOUS (*):

DEAD TIME

CONTROL SIGNALS EDGES

NOT OVERLAPPED,

BUT INSIDE THE DEAD TIME:

DEAD TIME

CONTROL SIGNALS EDGES

NOT OVERLAPPED,

OUTSIDE THE DEAD TIME:

DIRECT DRIVING

(*) HIN and LIN can be connected together and driven by just one control signal

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

gate driver outputs OFF

(HALF-BRIDGE TRI-STATE)

AM10496v1

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