AN2123 datasheet(1/15 Pages) STMICROELECTRONICS

Il numero della parte	AN2123

Spiegazioni elettronici	Principles of operation and application

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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AN2123/0205

Revision 1

1/15

1 Introduction

The TD351 is an advanced IGBT driver with integrated control and protection functions. It is a simplified

version of the TD350, available in an SO8 or DIP8 package. The TD35x family (including the TD350,

TD351 and TD352) provides a wide range of drivers specially adapted to drive 1200 V IGBTs with current

ratings of 15 to 75 A in Econopak-like modules (see Figure 2).

The main features of the TD351 are:

- 1 A sink/0.75 A source peak output current minimum over the full temperature range (-20°C to

125°C),

- active Miller clamp function to reduce the risk of induced turn-on in high dV/dt conditions, and in

most cases, without requiring a negative gate drive,

- optional 2-step turn-off sequence to reduce over-voltage in case of an over-current or a short-

circuit situation; a feature that protects the IGBT and avoids RBSOA problems,

- input stage compatible with both an optocoupler and a pulse transformer.

Applications include three-phase full-bridge inverters such as in motor speed control and UPS systems

(see Figure 1).

Figure 1. TD351 in 3-phase inverter application (1200 V IGBTs)

Phase 1

Phase 2

Phase 3

V+ DCbus

V- DCbus

High-side power

supply

or

Bootstrap

Circuitry

Low-side power

supply

TD351

AN2123

Application Note

TD351 Advanced IGBT Driver

Principles of operation and application

by Jean-François GARNIER & Anthony BOIMOND

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