AN3338 datasheet(19/72 Pages) STMICROELECTRONICS

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Doc ID 18441 Rev 4

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AN3338

Electrical characteristics and functions

2.3.1

Logic inputs

The high voltage gate driver IC has two logic inputs, HIN and LIN, to separately control the

high side and low side outputs, HVG and LVG. Please refer to

Table 1 for the input signal

logics by device.

In order to prevent any cross conduction between high side and low side IGBT a safety time

(dead time) is introduced (see

Section 2.3.4: Dead time and interlocking function

management for further details).

All the logic inputs are provided with hysteresis (~1 V) for low noise sensitivity and are

TTL/CMOS 3.3 V compatible. Thanks to this low voltage interface logic compatibility, the

SLLIMM can be used with any kind of high performance controller, such as microcontrollers,

DSPs or FPGAs.

As shown in the block diagrams of

Figure 11 and Figure 12, the logic inputs have internal

pull-down (or pull-up) resistors in order to set a proper logic level in case of interruption in

the logic lines. If logic inputs are left floating, the gate driver outputs LVG and HVG are set to

low level. This simplifies the interface circuit by eliminating the six external resistors and,

therefore saving cost, board space and number of components.

Figure 11. Logic input configuration for STGIPS10K60A

HVIC

SLLIMM

High side

level

shifting

driver

Low side

driver

UV detection

Logic

Shoot-trough

prevention

Bootstrap driver

AN3338 Datasheet(PDF) 19 Page - STMicroelectronics