ST TD350E User Manual

Features

■ 1.5 A source/2.3 A sink (typ) gate drive

■ Active Miller clamp feature

■ Two-level turn-off with adjustable level and

delay

■ Desaturation detection

■ Fault status output

■ Negative gate drive capability

■ Input compatible with pulse transformer or

optocoupler

■ Separate sink and source outputs for easy gate

driving

■ UVLO protection

■ 2 kV ESD protection (HBM)

Applications

■ 1200 V, 3-phase inverters

■ Motor control

■ UPS systems

TD350E

Advanced IGBT/MOSFET driver

Description

This device is an advanced gate driver for IGBTs
and power MOSFETs. Control and protection
functions are included and allow the design of
high reliability systems.

The innovative active Miller clamp function
eliminates the need for negative gate drive in
most applications and allows the use of a simple
bootstrap supply for the high side driver.

The device includes a two-level turn-off feature
with adjustable level and delay. This function
protects against excessive overvoltage at turn-off
in case of overcurrent or short-circuit conditions.
The same delay set in the two-level turn-off
feature is applied at turn-on to prevent pulse width
distortion.

The device also includes IGBT desaturation
protection and a FAULT status output, and is
compatible with both pulse transformer and
optocoupler signals.

Table 1. Device summary

Order codes Temperature range Package Packaging

TD350E

-40, +125 °C SO-14

TD350ETR Tape and reel

September 2011 Doc ID 018539 Rev 2 1/17

Tube

www.st.com

17

Contents TD350E

Contents

1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.2 Voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.3 Desaturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.4 Active Miller clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.5 Two-level turn-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.6 Minimum ON time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.7 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.8 Fault status output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.9 Undervoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 Typical performance curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8 Application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2/17 Doc ID 018539 Rev 2

TD350E Block diagram

1 Block diagram

Figure 1. TD350E functional block diagram

9UHI

0ULSE4RANSFORMER

9+

9UHI

9UHI

9+

).

62%&

&!5,4

.#

#/&&

.#

,6/&&

6REF

/FF

DELAY

/FF,EVEL

56,/

#ONTROL "LOCK

4$%

$ESAT

$%3!4

6(

/54(

/54,

6,

#,!-0

'.$

6

/PTIONNAL

6

".W

Doc ID 018539 Rev 2 3/17

Pin connections TD350E

2 Pin connections

Figure 2. Pin connections (top view)



$%3!4



6(











(

/54

/54,

6,

#,!-0

'.$

62%

&!5, 4

.#

#/&&

.#

,6/&&



).

&





4$%









Table 2. Pin description

Name Pin number Type Function

IN 1 Analog input Input

VREF 2 Analog output +5 V reference voltage

FAULT 3 Digital output Fault status output

NC 4 Not connected

COFF 5 Timing capacitor Turn-off delay

NC 6 Not connected

LVOFF 7 Analog input Turn off level

GND 8 Power supply Signal ground

".W

CLAMP 9 Analog output Miller clamp

VL 10 Power supply Negative supply

OUTL 11 Analog output Gate drive output (sink)

OUTH 12 Analog output Gate drive output (source)

VH 13 Power supply Positive supply

DESAT 14 Analog input Desaturation protection

4/17 Doc ID 018539 Rev 2

TD350E Absolute maximum ratings

3 Absolute maximum ratings

Table 3. Key parameters and their absolute maximum ratings

Symbol Parameter Value Unit

VHL Maximum supply voltage (VH - VL) 28 V

VH Maximum VH voltage vs. GND 28 V

VL Minimum VL voltage vs. GND -12 V

V

V

V

T

R

R

ESD Electrostatic discharge (HBM) 2 kV

Voltage on OUTH, OUTL, CLAMP pins VL-0.3 to VH+0.3 V

out

Voltage on DESAT, FAULT, LVOFF pin -0.3 to VH+0.3 V

des

Voltage on other pins (IN, COFF, VREF) -0.3 to 7 V

other

Power dissipation 500 mW

P

d

Storage temperature -55 to 150 °C

stg

T

Maximum junction temperature 150 °C

j

Thermal resistance junction-ambient 125 °C/W

thja

Thermal resistance junction-case 22 °C/W

thjc

Table 4. Operating conditions

Symbol Parameter Value Unit

VH Positive supply voltage vs. GND UVLO to 26 V

VL Negative supply voltage vs. GND 0 to -10 V

VH-VL Maximum total supply voltage 26 V

T

Operating free air temperature range -40 to 125 °C

oper

Doc ID 018539 Rev 2 5/17

Electrical characteristics TD350E

4 Electrical characteristics

TA = -20 to 125 °C, VH=16 V, VL= -10 V (unless otherwise specified)

Table 5. Electrical characteristics

Symbol Parameter Test condition Min Typ Max Unit

Input

V

V

t

onmin

I

Voltage reference

V

I

IN turn-on threshold voltage 0.8 1.0 V

ton

IN turn-off threshold voltage 4.0 4.2 V

toff

Minimum pulse width 100 135 220 ns

IN input current 1 μA

inp

(1)

Voltage reference

ref

Maximum output current 10 mA

ref

Desaturation protection

V

I

Desaturation threshold 6.5 7.2 7.9 V

des

Source current 250 μA

des

Fault output

t

fault

V

Delay for fault detection 500 ns

FAULT low voltage I

FL

Clamp

V

tclamp

V

CLAMP pin voltage threshold 2.0 V

Clamp low voltage

CL

Off delay

T=25°C
T

<T<T

min

FLsink

T=25°C; I
T

min

max

=10mA 1 V

=500mA

CLsink

<T<T

max

; I

CLsink

=500mA

4.85

4.77

5.00 5.15

5.22

VL+2.5
VL+3.0VV

V
V

V

R

Voltage threshold 2.35 2.50 2.65 V

tdel

Discharge resistor I=1mA 500 Ω

del

Off levels

I

blvoff

V

LVOFF peak input current (sink) LVOFF=12V 120 200 μA

Offset voltage LVOFF=12V -0.3 -0.15 0 V

iolv

Outputs

V

V

Output low voltage at I

OL1

Output low voltage at I

OL2

=20mA VL+0.35 V

osink

osink

=200mA

T=25°C

<T<T

T

min

max

6/17 Doc ID 018539 Rev 2

VL+1.0
VL+1.5VV