TD350E
Advanced IGBT/MOSFET driver
Datasheet - production data
Applications
1200 V, 3-phase inverters
Motor control
UPS systems
Description
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)
The TD350E 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 code
TD350E
TD350ETR
Temperature range
Package
-40, +125 °C
SO-14
June 2013
This is information on a product in full production.
DocID018539 Rev 3
Packaging
Tube
Tape and reel
1/18
www.st.com
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
Typical performance curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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TD350E
Block diagram
1
Block diagram
Figure 1. Functional block diagram
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DocID018539 Rev 3
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18
Pin connections
2
TD350E
Pin connections
Figure 2. Pin connections (top view)
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Table 2. Pin description
4/18
Name
Pin number
Type
IN
1
Analog input
VREF
2
Analog output
+5 V reference voltage
FAULT
3
Digital output
Fault status output
NC
4
Not connected
COFF
5
Timing capacitor
NC
6
Not connected
LVOFF
7
Analog input
Turn-off level
GND
8
Power supply
Signal ground
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
DocID018539 Rev 3
Function
Input
Turn-off delay
TD350E
3
Absolute maximum ratings
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
Vout
Voltage on OUTH, OUTL, CLAMP pins
VL - 0.3 to VH + 0.3
V
Vdes
Voltage on DESAT, FAULT, LVOFF pin
-0.3 to VH + 0.3
V
Vother
Voltage on other pins (IN, COFF, VREF)
-0.3 to 7
V
500
mW
-55 to 150
°C
Maximum junction temperature
150
°C
Rthja
Thermal resistance junction-ambient
125
°C/W
Rthjc
Thermal resistance junction-case
22
°C/W
ESD
Electrostatic discharge (HBM)
2
kV
Value
Unit
Pd
Power dissipation
Tstg
Storage temperature
Tj
Table 4. Operating conditions
Symbol
Parameter
VH
Positive supply voltage vs. GND
UVLO to 26
V
VL
Negative supply voltage vs. GND
0 to -10
V
26
V
-40 to 125
°C
VH-VL
Toper
Maximum total supply voltage
Operating free air temperature range
DocID018539 Rev 3
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18
Electrical characteristics
4
TD350E
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.
0.8
1.0
Max.
Unit
Input
Vton
IN turn-on threshold voltage
Vtoff
IN turn-off threshold voltage
tonmin
Iinp
Minimum pulse width
100
V
4.0
4.2
V
135
220
ns
1
A
5.15
5.22
V
V
IN input current
Voltage reference(1)
Vref
Voltage reference
Iref
Maximum output current
T = 25 °C
Tmin < T < Tmax
4.85
4.77
5.00
10
mA
Desaturation protection
Vdes
Desaturation threshold
Ides
Source current
6.5
7.2
7.9
V
A
250
Fault output
tfault
Delay for fault detection
VFL
FAULT low voltage
IFLsink = 10 mA
500
ns
1
V
Clamp
Vtclamp
VCL
CLAMP pin voltage threshold
Clamp low voltage
2.0
T = 25 °C; ICLsink = 500 mA
Tmin < T < Tmax; ICLsink = 500 mA
V
VL + 2.5
VL + 3.0
V
V
2.65
V
500
120
200
A
-0.15
0
V
VL + 0.35
V
VL +1.0
VL +1.5
V
V
Off delay
Vtdel
Voltage threshold
Rdel
Discharge resistor
2.35
2.50
I = 1 mA
Off levels
Iblvoff
LVOFF peak input current (sink) LVOFF = 12 V
Violv
Offset voltage
LVOFF = 12 V
VOL1
Output low voltage
Iosink = 20 mA
VOL2
Output low voltage
T = 25 °C, Iosink = 200 mA
Tmin < T < Tmax, Iosink = 200 mA
-0.3
Outputs
6/18
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TD350E
Electrical characteristics
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VL + 2.5
VL + 3.0
V
V
VOL3
Output low voltage
T = 25 °C, Iosink = 500 mA
Tmin < T < Tmax, Iosink = 500 mA
VOH1
Output high voltage 1
Iosource = 20 mA
VH - 2.5
V
VOH2
Output high voltage 2
Iosource = 200 mA
VH - 3.0
V
VOH3
Output high voltage 3
Iosource = 500 mA
VH - 4.0
V
tr
Rise time
CL = 1 nF, 10% to 90%
VL = 0
VL = -10 V
130
175
ns
ns
tf
Fall time (2)
CL = 1 nF, 90% to 10%
VL = 0
VL = -10 V
75
90
ns
ns
600
ns
650
ns
570
ns
620
ns
10% output change;
T = 25 °C
400
10% output change;
Tmin < T < Tmax
350
10% output change;
T = 25 °C
350
10% output change;
Tmin < T < Tmax
300
10% output change
25
50
120
ns
UVLOH UVLO top threshold
10
11
12
V
UVLOL UVLO bottom threshold
9
10
11
V
0.5
1
tpd_on
tpd_off
Tw
Turn-on propagation delay
Turn-off propagation delay
Input to output pulse distortion
500
450
Undervoltage lockout (UVLO)
Vhyst
UVLO hysteresis
UVLOH - UVLOL
V
Supply current
Iin
Quiescent current
Output = 0 V, no load
5
mA
1. Recommended capacitor range on VREF pin is 10 nF to 100 nF.
2. 2-step turn-off disabled.
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Functional description
TD350E
5
Functional description
5.1
Input
The input is compatible with optocouplers or pulse transformers. The input is triggered by
the signal edge and allows the use of a small-sized, low cost pulse transformer. Input is
active low (output is high when input is low) to ease the use of the optocoupler. When driven
by a pulse transformer, the input pulse (positive and negative) width must be larger than the
minimum pulse width tonmin.
5.2
Voltage reference
A voltage reference is used to create accurate timing for the two-level turn-off with external
resistor and capacitor.
5.3
Desaturation protection
Desaturation protection ensures the protection of the IGBT in the event of overcurrent.
When the DESAT voltage goes higher than 7 V, the output is driven low (with 2-level turn-off,
if applicable). The FAULT output is activated. The FAULT state is exited at the next falling
edge of IN input.
A programmable blanking time is used to allow enough time for IGBT saturation. Blanking
time is provided by an internal current source and external capacitor.
DESAT input can also be used with an external comparator for overcurrent or
overtemperature detection.
5.4
Active Miller clamp
A Miller clamp allows the control of the Miller current during a high dV/dt situation and can
eliminate the need for a negative supply voltage.
During turn-off, the gate voltage is monitored and the clamp output is activated when gate
voltage goes below 2 V (relative to GND). The clamp voltage is VL+3 V max. for a Miller
current up to 500 mA. The clamp is disabled when the IN input is triggered again.
5.5
Two-level turn-off
The two-level turn-off is used to increase the reliability of the application.
During turn-off, gate voltage can be reduced to a programmable level in order to reduce the
IGBT current (in the event of overcurrent). This action prevents both dangerous overvoltage
across the IGBT and RBSOA problems, especially at short-circuit turn-off.
The two-level turn-off (Ta) delay is programmable through an external resistor and capacitor
for accurate timing (refer to Equation 1).
Turn-off delay (Ta) is also used to delay the input signal to prevent distortion of input pulse
width.
8/18
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TD350E
Functional description
Equation 1
Ta [s] 0.7 • Roff [k] • Coff [nF]
5.6
Minimum ON time
In order to ensure the proper operation of the 2-level turn-off function, the input ON time
(Twin) must be greater than the Twinmin value:
Equation 2
Twinmin = Ta + 2 • Rdel • Coff
Rdel is the internal discharge resistor and Coff is the external timing capacitor.
Input signals smaller than Ta are ignored. Input signals larger than Twinmin are transmitted to
the output stage after the Ta delay with minimum width distortion (Tw = Twout - Twin).
For an input signal width Twin between Ta and Twinmin, the output width Twout is reduced
below Twin (pulse distortion) and the IGBT could be partially turned on. These input signals
should be avoided during normal operation.
5.7
Output
The output stage is able to sink 2.3 A and source 1.5 A (typ.) at 25 °C (1.2 A/0.75 A
minimum over the full temperature range). Separate sink and source outputs allow
independent gate charge and discharge control without an extra external diode.
5.8
Fault status output
Fault output is used to signal a fault event (desaturation, UVLO) to a controller. The fault pin
is designed to drive an optocoupler.
5.9
Undervoltage protection
Undervoltage detection protects the application in the event of a low VH supply voltage
(during startup or a fault situation). During undervoltage, the OUTH pin is open and the
OUTL pin is driven low (active pull-down for VH > 2 V, passive pull-down for VH < 2 V). Fault
output signals the undervoltage state and is reset only when undervoltage state disappears.
DocID018539 Rev 3
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Functional description
TD350E
Figure 3. Undervoltage protection
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TD350E
Functional description
Figure 4. Detailed internal schematic
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Timing diagrams
6
TD350E
Timing diagrams
Figure 5. Turn-on and turn-off
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Typical performance curves
7
Typical performance curves
Figure 8. Supply current vs. temperature
Figure 9. Low level output voltage vs. temp.
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25
50
75
100
125
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Figure 10. Desaturation threshold vs. temp.
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Application diagrams
8
TD350E
Application diagrams
Figure 14. Single supply IGBT drive with active Miller clamp and 2-level turn-off
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Figure 16. Use of DESAT input for direct overcurrent detection
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14/18
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TD350E
9
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK is an ST trademark.
Figure 17. Package SO-14 package outline
62
DocID018539 Rev 3
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18
Package information
TD350E
Table 6. SO-14 package mechanical data
Dimensions (mm)
Symbol
Min.
Max.
A
1.35
1.75
A1
0.10
0.25
A2
1.10
1.65
B
0.33
0.51
C
0.19
0.25
D
8.55
8.75
E
3.80
4.00
e
1.27
H
5.80
6.20
h
0.25
0.50
L
0.40
1.27
k
0
8
ddd
16/18
Typ.
0.10
DocID018539 Rev 3
TD350E
10
Revision history
Revision history
Table 7. Document revision history
Date
Revision
08-Mar-2011
1
First release.
21-Sep-2011
2
– Updated Table 1
– Minor text changes throughout the document
3
Updated Figure 1, Figure 4 to Figure 7, Figure 9 to Figure 16 (minor
corrections).
Updated Figure 3 (replaced “VCCmin” by “2 V”).
Updated Table 5 (moved “Iosink” for “VOL1/2/3” symbols to “Test
condition”).
Updated Section 5.5 (replaced “Turn-off” by “The two-level turn-off”,
added Equation 1).
Updated Section 5.6 (added heading for Equation 2).
Updated Table 6 (updated data, reversed order of Figure 17 and
Table 6).
Minor corrections throughout document.
13-Jun-2013
Changes
DocID018539 Rev 3
17/18
18
TD350E
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