STMicroelectronics TD351 Technical data

■ 1A sink / 0.75A source min. gate drive

■ Active Miller clamp feature

■ Adjustable and accurate two steps turn-off

level and delay

■ Input compatible with pulse transformer or

optocoupler

■ UVLO protection

■ 2kV ESD protection

Description

TD351 is an advanced gate driver for IGBT and
power MOSFET. Control and protection functions
are included and allow the design of high reliability
systems

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

TD351 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 condition. Same
delay is applied at turn-on to prevent pulse width
distortion.

TD351 is compatible with both pulse transformer
and optocoupler signals.

TD351

Advanced IGBT/MOSFET Driver

N

DIP-8

(Plastic Package)

D

SO-8

(Plastic Micropackage)

Pin Connections (top view )

1

VREF

2

TD351

CD VL

3

VHIN

8

7

OUT

6

Applications

LVOFF

4

5

CLAMP

■ 1200V 3-phase inverter

■ Motor control systems

■ UPS

Order Codes

Part Number Temperature Range Package Packaging Marking

TD351IN
TD351ID SO Tube TD351I

TD351IDT SO Tape & Reel TD351I

November 2004 revision 1 1/12

-40°C, +125°C

DIP Tube TD351I

TD351 Block Diagram

1 Block Diagram

Figure 1: System and internal block diagram

VH

IN VH

VREF

CD

VH

LVOFF

Vref

Delay

Off Level

UVLO

Control Block

OUT

VL

CLAMP

TD351

Table 1: Pin Description

Name

IN 1 Analog input Input
VREF 2 Analog output +5V reference voltage
CD 3 Timing capacitor Turn on/off delay
LVOFF 4 Analog input Turn off level
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

Pin

Number

Type Function

16V

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Absolute Maximum Ratin gs TD351

2 Absolute Maximum Ratings

Table 2: parameters and their absolute maximum ratings

Symbol Parameter Value Unit

VHL Maximum Supply Voltage (VH - VL) 28 V
Vout Voltage on OUT, CLAMP, LVOFF pins VL-0.3 to VH+0.3 V
Vter Voltage on other pins (IN, CD, VREF) -0.3 to 7 V

Pd Power dissipation 500 mW

Tstg Storage temperature -55 to 150 °C

Tj Maximum Junction Temperature 150 °C
Rhja Thermal Resis tance Junction-A mbie nt 150 °C/W
ESD Electrostatic discharge 2 kV

Table 3: Operating Conditions

Symbol Parameter Value Unit

VH Positive Supply Voltage vs. VL UVLO to 26 V

Toper Operating Free Air Temperature Range -40 to 125 °C

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TD351 Electrical Characteristics

3 Electrical Characteristics

Table 4: Electri cal characteristics for T

Symbol Parameter Test Condition Min Typ Max Unit

Input

Vton IN turn-on threshold voltage 0.8 1.0 V

Vtoff IN turn-off threshold voltage 4.0 4.2 V

tonmin Minimum pulse width 100 135 220 ns

Iinp IN Input current IN input voltage < 4.5V 1

Voltage reference - Note 1

Vref Voltage reference T=25°C 4.85 5.00 5.15 V

Iref Maximum output current 10 mA

Clamp

Vtclamp CLAMP pin voltage threshold 2.0 V

VCL Clamp low voltage Ic sink= 500m A 2.5 V

Delay

Vtdel Voltage threshold 2.5 V

Rdel Discharge resistor I=1mA 500

Off Level

Iblvoff LVOFF peak input current (sink) LVOFF=12V 90 200

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

Outputs

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 (2 step turn-off disabled) CL=1nF, 90% to 10% 100 ns

tdon Turn on propagation delay

tdoff

∆tw

Under Voltage Lockout (UVLO)

UVLOH UVLO top threshold 10 11 12 V

UVLOL UVLO bottom threshold 9 10 11 V

Vhyst U VLO hyste resis Vhyst=UVLO H-UV LOL 0.5 1 V

Supply current

Iin Quiescent current input low, no load 2.5 mA

Turn off propagation delay
(2-level turn-off disabled)

Input to output pulse distortion 10% output change,

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

amb

10% output change:
Rd=4.7k, no Cd
Rd=10k, Cd=220pF 1.8 2.0

10% output change

∆tw=Twout-Twin

50 100 ns

600

2.2

550 ns

µA

Ω

µA

ns

µs

Note: 1.Recommended capacitor range on VREF pin is 10nF to 100nF

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