L6494
High voltage high and low-side 2 A gate driver
Datasheet
-
production data
Description
The L6494 is a high-voltage device manufactured
with the BCD6 “offline” technology. It is a single
chip half-bridge gate driver for N-channel power
MOSFETs or IGBTs.
The high-side (floating) section is designed to
stand a DC voltage rail up to 500 V, with 600 V
transient withstand voltage. The logic inputs are
CMOS/TTL compatible down to 3.3 V for easy
interfacing control units such as microcontrollers
or DSP.
The device is a single input gate driver with
programmable deadtime, and also features an
active-low shutdown pin.
Both device outputs can sink 2.5 A and source 2
A, making the L6494 particularly suited for
medium and high capacity power
MOSFETs\IGBTs.
The independent UVLO protection circuits
present on both the lower and upper driving
sections prevent the power switches from being
operated in low efficiency or dangerous
conditions.
The integrated bootstrap diode as well as all of
the integrated features of this driver make the
application PCB design simpler and more
compact, and help reducing the overall bill of
material.
SO-14
Features
Transient withstand voltage 600 V
dV/dt immunity ± 50 V/ns in full temperature
range
Driver current capability:
– 2 A source typ. at 25 °C
– 2.5 A sink typ. at 25 °C
Short propagation delay: 85 ns
Switching times 25 ns rise/fall with 1 nF load
Integrated bootstrap diode
Single input and shutdown pin
Adjustable deadtime
3.3 V, 5 V TTL/CMOS inputs with hysteresis
UVLO on both high-side and low-side sections
Compact and simplified layout
Bill of material reduction
Flexible, easy and fast design
Applications
Motor driver for home appliances, factory
automation, industrial drives and fans
HID ballasts
Induction heating
Welding
Industrial inverters
UPS
Power supply units
DC-DC converters
November 2017
This is information on a product in full production.
DocID030317 Rev 2
1/18
www.st.com
Contents
L6494
Contents
1
2
3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description and connection diagram . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
3.2
3.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
5
6
7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Bootstrap driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
C
BOOT
selection and charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1
SO-14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9
10
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
DocID030317 Rev 2
Pin description and connection diagram
L6494
2
Pin description and connection diagram
Figure 2. Pin connection SO-14 (top view)
Table 1. Pin description
Pin no.
1
2
4
6
7
11
12
13
3
5
8, 9, 10, 14
Pin name Type
IN
SD
DT
LVG
(1)
VCC
OUT
HVG
(1)
BOOT
SGND
PGND
NC
I
-
I
O
P
P
O
P
P
P
-
Function
Output drivers logic input (is in phase with HVG and in opposition of
phase with LVG)
Shutdown logic input (active-low)
Deadtime setting
Low-side driver output
Low-side section supply voltage
High-side (floating) section common voltage
High-side driver output
High-side (bootstrapped) section supply voltage
Signal ground
Power ground
Not connected
1. The circuit guarantees less than 1 V on the LVG and HVG pins (at I
sink
= 10 mA), with V
CC
> 3 V. This
allows omitting the “bleeder” resistor connected between the gate and the source of the external MOSFET
normally used to hold the pin low.
4/18
DocID030317 Rev 2
L6494
Electrical data
3
3.1
Electrical data
Absolute maximum ratings
Table 2. Absolute maximum ratings
(1)
Value
Symbol
V
CC
V
PGND
V
OUT
V
BOOT
V
hvg
V
lvg
V
i
P
TOT
T
J
T
stg
ESD
Supply voltage
Low-side driver ground
Output voltage
Boot DC voltage
Boot transient withstand voltage (T
pulse
< 1 ms)
High-side gate output voltage
Low-side gate output voltage
Logic input pins voltage
Parameter
Min.
-0.3
V
CC
- 21
V
BOOT
- 21
-0.3
-
V
OUT
- 0.3
PGND - 0.3
-0.3
-
-
-
-50
2
Max.
21
V
CC
+ 0.3
V
BOOT
+ 0.3
500
620
V
BOOT
+ 0.3
V
CC
+ 0.3
15
50
1
150
150
kV
V
V
V
V
V
V
V
V
V/ns
W
°C
°C
-
Unit
dV
OUT
/dt Allowed output slew rate
Total power dissipation (T
A
= 25 °C) SO-14
Junction temperature
Storage temperature
Human body model
1. Each voltage referred to SGND unless otherwise specified.
3.2
Thermal data
Table 3. Thermal data
Symbol
R
th(JA)
Parameter
Thermal resistance junction to ambient
Package
SO-14
Value
120
Unit
°C/W
DocID030317 Rev 2
5/18
18
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