Reference Design RDHP-1608
General Purpose Base Board for
SCALE™-iDriver SID1182K
Application
General purpose drives, UPS, solar power and others
Suitable for IGBT power modules in various housings
Up to 800V DC-link voltage
Electrical interfaces
Interlock
Short-circuit detection with Advanced Soft Shut Down
High-Power Application Engineering Department
RDHP-1608
A.1
Specification
Author
Document Number
Revision
1
1
The letter refers to the hardware revision. The number refers to the documentation revision.
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Reference Design RDHP-1608
Scope
This application proposal provides a circuit design for a general purpose base board for driving various IGBT
power modules.
The main features of the design are:
Suitable for IGBT power modules in various housings such as 17mm dual, 17mm six-pack,
62mm, PrimePACK™, etc. with a maximum blocking voltage of 1200V
Short-circuit detection with Advanced Soft Shut Down (ASSD)
Electrical command inputs and status outputs
0V/5V command input logic
0V/5V status output logic
Minimum pulse suppression
Interlock of command inputs
5V supply voltage
Single PCB solution with soldered-in gate driver IC
Intellectual Property Licensing
The design proposal, products and applications illustrated herein (including transformer construction and
circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by
pending U.S. and foreign patent applications assigned to Power Integrations.
A complete list of Power Integrations patents may be found at
https://www.power.com/.
Power Integrations grants its customers a license under certain patent rights as set forth at
https://www.power.com/company/intellectual-property-licensing/.
Application Conditions
The design is proposed for the following application conditions:
General purpose applications and IGBT power modules
Adaptations such as adjustment of gate resistors can easily be done
Up to 8A peak gate current
Up to 1W per channel
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Reference Design RDHP-1608
Design Description
In addition to the following design description, reference to the datasheet of the gate driver IC family is
recommended.
Gate Resistors
Gate resistor values are not explicitly given as they depend on the IGBT power module used and on the
application. Gate resistors of either SMD (size 1206) or THT (size PR02) package can be selected.
Turn-on gate resistors:
Channel
1
2
SMD Package
THT Package
R107a … R107d R106
R207a … R207d R206
Turn-off gate resistors:
Channel
1
2
SMD Package
THT Package
R109a … R109d R108
R209a … R209d R208
The gate resistors must be determined and assembled by the user.
V
CEsat
Monitoring
SID1182K gate driver ICs from Power Integrations provide sense inputs for monitoring IGBT short-circuit
conditions.
This design offers a V
CEsat
monitoring function using either a resistor network or high-voltage diodes based on
the same layout (Power Integrations recommends using the resistor network implementation as the preferred
solution). The assembly variants of either implementation are described in the following table:
Implementation
Resistor network
High-voltage diodes
C100,
C200
33pF
100pF
R100,
R200
120kΩ
330Ω
R101,
R201
n.a.
47kΩ
R102 ... R105,
R202 ... R205
330kΩ
n.a.
D102, D103,
D202, D203
n.a.
UF4007
D100,
D200
BAS416
n.a.
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Reference Design RDHP-1608
The details of the V
CEsat
monitoring function are described in the corresponding datasheet of the gate driver.
Advanced Soft Shut Down (ASSD)
The driver ICs SID1182K of the SCALE-iDriver family feature an Advanced Soft Shut Down (ASSD) function,
which reduces the turn-off
di
/
dt
to limit V
CE
overvoltage spikes as soon as a short-circuit condition is detected.
An excessive turn-off overvoltage is therefore avoided and the IGBT is turned off within its safe operating
area.
The ASSD function is only active under short-circuit conditions, but not under normal operating conditions
(e.g. at nominal current or in over-current conditions), i.e. it is triggered by the V
CEsat
monitoring function.
The ASSD function may also have performance limitations, such as at high DC-link voltages and/or high
commutation loop stray inductances. If the application is operated at these boundary conditions, it is
recommended to implement Basic Active Clamping.
For further details concerning the ASSD function refer to the datasheet of the gate driver IC SID1182K.
Interlock
To prevent synchronous switching of the gate driver channels 1 and 2 an interlock circuitry is implemented.
Minimum Pulse Suppression
This design possesses a minimum pulse suppression with a time constant
of typically 99ns. If required the
setting can be changed by adjusting C300 and C301. The time constant
is given by the following equations:
1
= 99Ω · C300
2
= 99Ω · C301
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Page 4
Reference Design RDHP-1608
Recommended values of C300 and C301 are in the range of 1nF (
x
= 99ns) to 3.3nF (
x
= 327ns), depending
on actual application conditions.
Blocking Time
During the blocking time, which is set to typically 10µs, the gate driver IC ignores incoming command signals.
The blocking time starts once a fault was detected by the gate driver IC’s secondary side (undervoltage lock-
out or a short-circuit event) or when an undervoltage condition ends on the primary side.
For further details refer to the datasheet of the gate driver SID1182K.
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