Document
L6494
High voltage high and low-side 2 A gate driver
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
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.
November 2017
This is information on a product in full production.
DocID030317 Rev 2
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www.st.com
Contents
Contents
L6494
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin description and connection diagram . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Bootstrap driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CBOOT selection and charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1 SO-14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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L6494
1
Block diagram
Block diagram
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DocID030317 Rev 2
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Pin description and connection diagram
2 Pin description and connection diagram
L6494
Figure 2. Pin connection SO-14 (top view)
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Table 1. Pin description
Pin no. Pin name Type
Function
1 IN
2 4 6 7 11 12 13 3 5 8, 9, 10, 14
SD DT LVG(1) VCC OUT HVG(1) BOOT SGND PGND NC
I
Output drivers logic input (is in phase with HVG and in opposition of phase with LVG)
- Shutdown logic input (active-low)
I Deadtime setting
O Low-side driver output
P Low-side section supply voltage
P High-side (floating) section common voltage
O High-side driver output
P High-side (bootstrapped) section supply voltage
P Signal ground
P Power ground
- Not connected
1.
The circuit guarantees less than 1 V allows omitting the “bleeder” resistor
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normally used to hold the pin low.
4/18 DocID030317 Rev 2
L6494
3 Electrical.