IRS26310DJPBF – High-Voltage 3-Phase Gate Driver IC with DC Bus Over-Voltage Protection
HVIC / MOTOR CONTROL
IRS26310D Functional Block Diagram
Schmitt-Trigger Inputs,
Noise Filter and
Shoot-through Protection
VSS
DC+ bus
IRS26310DJPbF
DC Bus Sense
Comparator Input and Filter
DCbusSense
Logic
THE POWER MANAGEMENT LEADER
600V 3-Phase Gate Drive IC
with UVLO Protection
Typical Connection Diagram
Summary
VCC
High-Side Input (x3)
HV Well
VS: High-Side
Power Supply (x3)
Low-Side Input (x3)
High-Side
Output (x3)
FAULT/EN
Logic
HV Level
Shifters
VS: High-Side
Return (x3)
High-Voltage 3-Phase Gate Driver IC
with DC Bus Over-Voltage Protection
To High-Side
Power Switches (x3)
Topology
3-Phase
VOFFSET
≤ 600V
VOUT
12V - 20V
IO+ & IO- (typical)
200mA & 350mA
tON & tOFF (typical)
530ns & 530ns
Deadtime (typical)
290ns
Package
44-lead PLCC
Vcc
HIN1,2,3
LIN1,2,3
FAULT/EN
Up to 600V
Vcc TST
HIN1,2,3
LIN1,2,3
FAULT/EN
VB1,2,3
1,2,3
VS1,2,3
DCBusSense
RCIN
ITRIP
Vss
HV Drive Stage
RCIN
ITRIP
Delay
COM
VSS
Features
Low-Side
Output (x3)
To Low-Side
Power Switches (x3)
• Drives up to six IGBT/MOSFET power devices
• Gate drive supplies up to 20 V per channel
• Integrated bootstrap functionality
• DC bus sensing with over-voltage protection
LV Drive Stage
• Over-current protection
IC detects overcurrent
and performs shutdown
• Over-temperature shutdown input
General Purpose
Comparator Input & Filter
• Advanced input filter
• Integrated deadtime protection
Vss
LO 1,2,3
COM
To
Load
IRS26310DJPbF
GND
Higher Efficiency
Modern washer manufacturers require state-of-the-art electronic components to deliver
more sophisticated features to the end user. The aim is to create a machine that can wash
almost all types of fabric with minimum energy, in less time and using less detergent than
previous models – without increasing the overall system cost.
Furthermore, government regulations are becoming more and more stringent in terms of
efficiency and safety. In the near future, a new energy labeling scheme may be introduced
in Europe – and the only way to achieve the highest class label will be to equip the washer
with a three-phase permanent magnet (PM) motor.
• Shoot-through (cross-conduction) protection
• Under-voltage lockout for VCC and VBS
IRS26310D typical application connection
• Enable/disable input and fault reporting
DCBUS
+
• Adjustable fault clear timing
• Separate logic and power grounds
Input
Voltage
• 3.3 V input logic compatible
To
Load
DCBUS
Sense
• Tolerant to negative transient voltage
• Designed for use with bootstrap
power supplies
–
The IRS26310DJPbF from International Rectifier is a high-voltage, high speed power
MOSFET and IGBT driver with three independent high- and low-side referenced output
channels for three-phase applications. The bootstrap diode functionality has been
integrated into this device to reduce the component count and PCB size. The new device
has been designed for three-phase inverters and is well suited to the requirements of PM
motors in washers as it enables high torque at low speed (during washing) and reaches
high speed with low torque demand (during spinning). This highly accurate torque and
speed control delivers an efficient washing cycle while reducing the motor flux to enable
a high spinning speed that helps deliver a more efficient drying function in compliance
with safety regulations.
• Matched propagation delays for all channels
• -40˚C to 125˚C operating range
VCC
Typical Applications
IRS26310DJPbF
• Permanent magnet motor drives
for appliances
• Industrial drives
Control Inputs, EN
For further information please contact your local Farnell office or visit the web at: www.farnell.com
30Nm
• Micro inverter drives
10207FS
5Nm
Wash cycle: High torque low speed
• RoHS compliant
DCBUSSense
Drum Torque
Two extreme point control
Field weakening operation
(Reduce flux to keep voltage from saturation)
Spin: Low torque high speed
1800rpm
Speed
For further information please contact your local Farnell office or visit the web at: www.farnell.com
10207FS
IRS26310DJPbF – High-Voltage 3-Phase Gate Driver IC with DC Bus Over-voltage Protection
DC + BUS
VB
(x3)
VBUS > VTH, BUS
DCBUS
Sense
VS
ITRIP
0
CBS
HO (x3)
OFF
(x3)
LO (x3)
100
200
300
Time (ns)
400
500
600
700
800
900
1000
0
RG, HO
OFF
VS1
OFF
VS2
-10
VS3
RG, LO
ON
ON
IRS26310DJPbF
Tested, guaranteed safe operating area
-20
IRS26310DJPbF brakes the motor by shorting the
motor terminal and avoiding excessive over-voltage
-30
VI (V)
VCC
Control is lost: DCBUS
voltage rises quickly due
to voltage regeneration.
ON
COM
VSS
-40
-50
-60
Phase Current
RSHUNT
-70
IRS26310DJPbF Safe Operating Area
under repetitive negative spikes
-80
-90
DC – BUS
DC Bus over-voltage protection scheme in IRS2631DJ
Overall Benefits
Washers equipped with PM motors present a new challenge
to washer manufacturers because, while in spinning mode, the
motor itself can become dangerous in the event that control is
lost. To reach the necessary high speed during spinning, the
motor must be de-fluxed in real-time fashion. This artificial
de-fluxing prevents the motor from generating a significant
voltage.
Problems arise if, in the event of controller failure, the motor
is left rotating without controlling the applied voltage to it.
The motor will then act as a dynamo, generating a high
voltage (above 1000V) that can create a fire hazard in the
electronics.
• Reduced component count because the high-voltage
clamping diodes used in other solutions are no longer
necessary;
• Fewer field returns because the robust IR HVIC does not fail
in an unpredictable manner unlike other solutions
Increased Reliability
Input filters have been re-designed to avoid small pulse
commands reaching the gates of the switches in the inverter.
This is one of the sources of problems in the field and usually
it is difficult to detect. The typical effect is that sometimes
inverters return from the field damaged with one destroyed
leg without an apparent root cause. The IRS26310DJPbF
embeds filters that solve this issue.
The IRS26310DJPbF from International Rectifier is part of the
company’s latest family of gate drivers designed to be the
most rugged in the market for hard switching environments
such as motor control circuits. A typical problem in voltage
source inverters with inductive loads (as in the motor control
domain) is that the hard switching generates negative
voltage spikes whose amplitude and duration depend on the
switches and on the layout of the application PCB. Each of
these spikes occurs at PWM frequency, so in some operating
conditions, they can occur 16000 times per second. In the
IRS26310DJPbF datasheet the Safe Operating Area for this
HVIC under these conditions is specified.
+VBUS
LD2
The IRS26310DJPbF from International Rectifier has been
designed with a specific hardware safety function that can
override the controller commands and brake the PM motor
(by shorting its terminals) until a safe low speed is reached,
thus avoiding high voltage generation. The IRS26310DJPbF
continuously senses the DC Bus through an external
resistor divider and, if a critical voltage is reached, the
IRS26310DJPbF successfully brakes the motor by shorting
the terminal through low-side switches.
A generic HVIC three-phase gate driver would require
an added external cicuit to perform the same function as
HO
VBUS
Q2
VS Undershoot
Control IC
LS2
VS
To Load
In addition to improved filtering techniques, the IRS26310DJPbF
also guarantees outstanding matching in propagation time on
all channels as well as dead-time automatically inserted when
external dead-time is lower than a minimum safe limit.
Cost-effectiveness
While including all features in the design of the new rugged
family of motion gate drivers, International Rectifier considered
the overall system cost requirements of its customers. Therefore,
the IRS26310DJPbF includes many features that are required in
modern applications while keeping external component count at
minimum. With fewer components and field returns, the overall
system cost is lower.
Advanced Input Filtering in IRS26321DJ
EXAMPLE 1
Safety regulations enforced by law require that every appliance
must meet precise international rules. Every appliance must
include safety protection circuits either in hardware or in
software that avoid hazards to the end user in case of failure
of any of the components in the machine. By law, every circuit
that implements a protective function must be certified by an
internationally recognized institute.
IRS26310DJPbF. This function is mandatory because it is
required for safety purposes. The IRS26310DJPbF also
embeds all other important protection that are used for
safety reasons: anti-shoot through, over-current protection,
under-voltage lockout and thermal shutdown input.
EXAMPLE 2
Greater Safety
tFIL,IN
IN
IN
OUT
tFIL,IN
OUT
Small pulses to the gate of the
switches may cause inverter damage
tFIL,IN
IN
IN
OUT
tFIL,IN
OUT
LD1
VS -COM
COM
COMPETITOR’S HVIC
IRS26310DJPbF HVIC
LO
Q1
-VS
LS1
Load Return
Tolerant to negative transient voltage
t
MT
TON, TOFF matching time (on all six channels)
50ns Max
MDT
DT matching (HIN ->LO & LO->HIN on all channels)
60ns Max
PM
Pulse width distortion
75ns Max
Outstanding deadtime and delay matching in IRS2631DJ along with low pulse width distortion