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
0ULSE4RANSFORMER
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