TD352
Advanced IGBT/MOSFET driver
Features
■
1.7 A sink / 1.3 A source (typ) current capability
■
Active Miller clamp feature
■
Desaturation detection
■
Adjustable turn-on delay
■
UVLO protection
■
2k V ESD protection
SO-8
Applications
■
1200 V 3-phase inverter
■
Motor control systems
■
UPS
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 TD352 includes an adjustable turn-on delay.
This feature can be used to implement reliable
deadtime between high and low sides of a half
bridge. An external resistor and capacitor are
used to provide accurate timing.
Table 1.
Device summary
Order codes
Temperature range
Package
-40°C, +125°C
SO-8
TD352ID
Tube
TD352IDT
June 2011
Packaging
Tape and reel
Doc ID 11095 Rev 2
1/18
www.st.com
18
Contents
TD352
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 stage
................................................ 8
5.2
Voltage reference
........................................... 8
5.3
Active Miller clamp
.......................................... 8
5.4
Turn-on delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.5
Desaturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.6
Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.7
Undervoltage protection
...................................... 9
6
Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
Typical performance curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
Doc ID 11095 Rev 2
TD352
Block diagram
Figure 1.
TD352 block diagram
6
8*
K
56,/
).
62%&
#$
$%3!4
6REF
$ELAY
6(
#ONTROL "LOCK
1
Block diagram
/54
6,
#,!-0
$ESAT
4$
!-V
Doc ID 11095 Rev 2
3/18
Pin connections
2
TD352
Pin connections
Figure 2.
Pin connections (top view)
9+
287
9/
&/$03
,1
95()
7'
&'
'(6$7
!-V
Table 2.
4/18
Pin description
Pin n°
Name
Type
Function
IN
1
Analog input
Input
VREF
2
Analog output
+5 V reference voltage
CD
3
Timing capacitor
Turn on delay
DESAT
4
Analog input
Desaturation protection
CLAMP
5
Analog output
Miller clamp
VL
6
Power supply
Signal ground
OUT
7
Analog output
Gate drive output
VH
8
Power supply
Positive supply
Doc ID 11095 Rev 2
TD352
Absolute maximum ratings
3
Absolute maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
28
V
VHL
Maximum supply voltage (VH - VL)
Vout
Voltage on OUT, CLAMP, DESAT pins
VL-0.3 to VH+0.3
V
Vother
Voltage on other pins (IN, CD, VREF)
-0.3 to 7
V
500
mW
-55 to 150
°C
Maximum junction temperature
150
°C
RthJA
Thermal resistance junction-ambient
150
°C/W
ESD
Electrostatic discharge (HBM)
2
kV
Value
Unit
UVLO to 26
V
-40 to 125
°C
Pd
Power dissipation
Tstg
Storage temperature
Tj
Table 4.
Symbol
VH
Toper
Operating conditions
Parameter
Positive supply voltage vs. VL
Operating free air temperature range
Doc ID 11095 Rev 2
5/18
Electrical characteristics
4
TD352
Electrical characteristics
TA = -20 to 125 °C, VH = 16 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
Iinp
IN input current
4.0
IN input voltage < 4.5V
V
4.2
V
1
µA
5.15
V
Voltage reference (1)
Vref
Voltage reference
Iref
Maximum output current
T = 25°C
4.85
5.00
10
mA
Clamp
Vtclamp
VCL
CLAMP pin voltage threshold
Clamp low voltage
2.0
Icsink = 500mA
V
2.5
V
Delay
Vtdel
Voltage threshold
Rdel
Discharge resistor
2.5
I=1mA
V
500
Ω
Desaturation protection
Vdes
Desaturation threshold
Ides
Source current
VH-2
V
250
µA
Output
Isink
Output sink current
Vout = 6V
1000
1700
mA
Isrc
Output source current
Vout = VH-6V
750
1300
mA
VOL1
Output low voltage 1
Iosink = 20mA
0.35
V
VOL2
Output low voltage 2
Iosink = 500mA
2.5
V
VOH1
Output high voltage 1
Iosource = 20mA
VH-2.5
V
VOH2
Output high voltage 2
Iosource = 500mA
VH-4.0
V
tr
Rise time
CL = 1nF, 10% to 90%
100
ns
tf
Fall time
CL = 1nF, 90% to 10%
100
ns
Turn on propagation delay
10% OUT change:
Rd = 4.7kΩ, no Cd
Rd = 11kΩ, Cd = 220 pF
500
2.2
ns
µs
400
ns
tdon
tdoff
6/18
Turn off propagation delay
10% OUT change
Doc ID 11095 Rev 2
1.8
2.0
TD352
Table 5.
Electrical characteristics
Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
Under voltage lockout (UVLO)
UVLOH
UVLO top threshold
10
11
12
V
UVLOL
UVLO bottom threshold
9
10
11
V
0.5
1
Vhyst
UVLO hysteresis
UVLOH-UVLOL
V
Supply current
Iin
Quiescent current
OUT = 0V; no load
2.5
mA
1. Recommended capacitor range on VREF pin is 10 nF to 100 nF
Doc ID 11095 Rev 2
7/18
Functional description
TD352
5
Functional description
5.1
Input stage
The TD352 IN input is internally clamped at about 5 V to 7 V. The input is triggered by the
signal edge. When using an open collector optocoupler, the resistive pull-up resistor can be
connected to either VREF or VH.
Recommended pull-up resistor value with VH=16 V is from 4.7 kΩ to 22 kΩ.
5.2
Voltage reference
A voltage reference is used to create accurate timing for the turn-on delay with external
resistor and capacitor.
A decoupling capacitor (10 nF to 100 nF) on the VREF pin is required to ensure good noise
rejection.
5.3
Active Miller clamp
The TD352 offers an alternative solution to the problem of Miller current in IGBT switching
applications. Instead of driving the IGBT gate to a negative voltage to increase the safety
margin, the TD352 uses a dedicated CLAMP pin to control the Miller current. When the
IGBT is off, a low impedance path is established between the IGBT gate and emitter to carry
the Miller current, and the voltage spike on the IGBT gate is greatly reduced.
During turn-off, the gate voltage is monitored and the clamp output is activated when the
gate voltage goes below 2 V (relative to VL). The clamp voltage is VL+4V max for a Miller
current up to 500 mA. The clamp is disabled when the IN input is triggered again.
The CLAMP function does not affect the turn-off characteristic, but only keeps the gate at
low level throughout the off time. The main benefit is that negative voltage can be avoided in
many cases, allowing a bootstrap technique for the high side driver supply.
5.4
Turn-on delay
Turn-on (Ta) delay is programmable through external resistor Rd and capacitor Cd for
accurate timing. Ta is approximately given by (see Figure 5):
Ta (µs) = 0.7 * Rd (kΩ) * Cd (nF)
The turn-on delay can be disabled by connecting the CD pin to VREF with a 4.7 kΩ resistor.
Input signals with ON-time smaller than Ta are ignored.
8/18
Doc ID 11095 Rev 2
TD352
5.5
Functional description
Desaturation protection
Desaturation protection ensures the protection of the IGBT in the event of overcurrent.
When the DESAT voltage goes higher than VH-2V, the TD352 OUT pin is driven low. The
fault state is only exited after a power-down and power-up cycle.
A programmable blanking time is used to allow enough time for IGBT saturation. Blanking
time is provided by an internal current source and external Cdes capacitor. The Tbdes
blanking time value is given by:
Tbdes = Vdes * Cdes / Ides
At VH=16V, Tbdes is approximately given by:
Tbdes (µs) = 0.056 * Cdes (pF)
5.6
Output stage
The output stage is able to sink/source 1.7 A/1.3 A (typical) at 25 °C and 1.0 A/0.75 A min.
over the full temperature range. This current capability is specified near the usual IGBT
Miller plateau.
5.7
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 OUT pin is driven low (active
pull-down for VH>2V, and passive pull-down for VH
很抱歉,暂时无法提供与“TD352ID”相匹配的价格&库存,您可以联系我们找货
免费人工找货- 国内价格 香港价格
- 100+10.73621100+1.29929
- 300+10.68604300+1.29322
- 400+10.68581400+1.29319
- 1000+10.685571000+1.29316
- 1500+10.685341500+1.29313