1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 1
1SD1548AI UL Single-Channel
High-Power SCALE Driver Core
Description
The SCALE driver 1SD1548AI UL from CONCEPT is based on a chip set that was
developed specifically for the reliable driving and safe operation of IGBTs and power
MOSFETs.
The SCALE driver 1SD1548AI UL
features a high gate current of ±48A
and a high power of 15W. It has been
specially developed for high-
frequency applications (e.g. resonant
converters) with a high gate-power
requirement or for high gate-current
driving applications (e.g. parallel
connection of high-power IGBT
modules).
Product Highlights Applications
[ Suitable for 1200V and 1700V IGBTs [ Inverters
[ Short-circuit and over-current protection [ Motor drive technology
[ Extremely reliable, long service life [ Traction
[ High gate current of ±48A [ Railroad power supplies
[ Electrical insulation of 4000VAC [ Converters
[ Electrically insulated status acknowledgement [ Power engineering
[ Monitoring of power supply and self-monitoring [ Switched-mode power supplies
[ Switching frequency DC to 150kHz [ Radiology and laser technology
[ Duty cycle: 0... 100% [ DC/DC converters
[ High dv/dt immunity, typical >100kV/μs [ Research
[ Complete with b uilt-in 15W DC/DC converter [ RF generators and converters
[ UL compliant
1SD1548AI UL
Data Sheet
Page 2 INTELLIGENT POWER ELECTRONICS
Block Diagram
VDC
GND
Rg
IGD001LDI001
Electronic Level External Circuit
Separation Power Level
Driver onInterface on
PWM
Oscillator
Galvanic
Rth
VDD
GND
Dz
Σ
Z1
Z2
COM
COM
VPOS
VPOS
VNEG
VNEG
E
AC
C
Rth
G
Fig. 1 Block diagram of the 1SD1548AI UL
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 3
Pin Designation
Pin Des. Function
1 VDD +15V for electronic input side
2 VDD +15V for electronic input side
3 VDD +15V for electronic input side
4 SO Status output
5 VL Logic level/Reset
6 In Input
7 GND Ground
8 GND Ground
9 GND Ground
10 GND Ground
11 GND Ground
12 GND Ground
13 GND Ground
14 VDC +15V for DC/DC converter
15 VDC +15V for DC/DC converter
16 VDC +15V for DC/DC converter
17 VDC +15V for DC/DC converter
18 VDC +15V for DC/DC converter
19 VDC +15V for DC/DC converter
20 Free
21 VDC +15V for DC/DC converter
22 VDC +15V for DC/DC converter
Pin Des. Function
44 VPOS Blocking capacitor +15V
43 COM Common
42 VNEG Blocking capacitor -15V
41 E Emitter
40 G Gate
39 E Emitter
38 G Gate
37 E Emitter
36 G Gate
35 AC Enhanced active clamping
34 Rth Reference resistor
33 C Collector sense
32 LS Local status
31 E Emitter
30 G Gate
29 E Emitter
28 G Gate
27 E Emitter
26 G Gate
25 VPOS Blocking capacitor +15V
24 COM Common
23 VNEG Blocking capacitor -15V
Notes:
1) Pins with the designation “Free” are not physically present.
2) E (Emitter) is directly connected to COM (same potential).
3) AC should be connected to VNEG if not used (normal case)
PCB Layout / Dimensions
Details of circuit board layout
Grid of the aspect drawing on page 4 below: 1.27mm (50mil)
Recommended diameter of solder pad: Ø 1.52mm
Recommended diameter of drill holes: Ø 1.1mm
1SD1548AI UL
Data Sheet
Page 4 INTELLIGENT POWER ELECTRONICS
Dimensions
Fig 2 Front view (top) / Layout overview component side (bottom) 1SD1548AI UL
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 5
Fig. 3 Side view (top) / Mechanical fixing (bottom) 1SD1548AI UL
Height X: typ. 19mm
1SD1548AI UL
Data Sheet
Page 6 INTELLIGENT POWER ELECTRONICS
Mechanical fixing
The 1SD1548AI UL driver has two holes, each 3.2mm in diameter. They allow additional
fixing of the driver for applications requiring very high resistance to shaking/vibration
(railways, traction systems, electrically-driven vehicles, etc.). See Fig. 3 (bottom).
Absolute Maximum Ratings
Parameter Test conditions Min Max Units
Supply voltage VDC 0 16 Vdc
Supply voltage VDD 0 16 Vdc
Logic input voltage To GND (Note 5) 0 VDD V
dc
Gate peak current IG G to E -48 +48 A
Output power DC/DC converter 15 W
Operating voltage Continuous (Note 8) 1700 Vdc
Test voltage (50Hz/1min) Inputs to outputs 4000 VAC(eff)
Operating temperature Note 10 -40 +85 °C
Storage temperature -40 +90 °C
All data refer to +25°C and VDD = VDC = 15V unless otherwise specified
Electrical Characteristics
Power supply Test conditions Min Typ. Max Units
Nominal supply voltage VDC To GND (Note 1) 15 Vdc
Supply current IDC Without load 55 mA
Max. supply current IDC Note 2 1200 mA
Output power DC/DC converter Note 3 15 W
Efficiency η Internal DC/DC converter, full load 90 %
Nominal supply voltage VDD To GND 15 Vdc
Supply current IDD Without load 10 mA
Supply current IDD At 50kHz switching frequency 14 mA
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 7
Electrical Characteristics (Continuation)
Power supply monitoring Test conditions Min Typ. Max Units
Turn-on threshold Vth Note 4 11.4 Vdc
Hysteresis on/off Note 4 0.8 Vdc
Logic inputs Test conditions Min Typ. Max Units
Input voltage All inputs (Note 5) 0 VDD V
dc
Timing characteristics Test conditions Min Typ. Max Units
Delay time input to output Turn-on tpd(on) 335 ns
Turn-off tpd(off) 420 ns
Blocking time After failure (Note 13) 1 s
Outputs Test conditions Min Typ. Max Units
Output current IG G to E (Note 6) -48 +48 A
Output rise time tr(out) G to E (Note 7) 20/85 ns
Output fall time tf(out) G to E (Note 7) 20/60 ns
Output current SO 1.5 mA
Output voltage rating SO SO to GND VDD V
Output current LS 5 mA
Vce monitoring Test conditions Min Typ. Max Units
Input C To E 0 VDD Vdc
Electrical insulation Test conditions Min Typ. Max Units
Operating voltage Continuous (Note 8) 1700 Vdc
Test voltage 50Hz/1min (Note 12) 4000 VAC(eff)
Partial discharge extinction volt. IEC270 (Note 11) >1700 VAC(pk)
Creep path input-output 20 mm
Maximum 'V/'t at 'V=1000V Note 9 100 kV/μs
All data refer to +25°C and VDD = VDC = 15V unless otherwise specified
1SD1548AI UL
Data Sheet
Page 8 INTELLIGENT POWER ELECTRONICS
Operating Conditions
Operating conditions Test conditions Min Max Units
Operating temperature Note 10 -40 +85 °C
Storage temperature -40 +90 °C
Footnotes to the key data
1) The drivers have a zener diode on the secondary side between VPOS – COM and COM – VNEG for
over-voltage protection. When the feed voltage exceeds 16V, this protection can be subject to
thermal overload.
2) If the specified power consumption is exceeded, this indicates an overload of the DC/DC converter.
It should be noted that the DC/DC con v erter is not protected against overload.
3) This should be considered as a recommended value. Please consult the section: “Output power
and self-heating”. Especially when the drivers produce continuously short pulses (on-time or off-
time < 1.5μs), their self-heating can be considerably increased. The maximum power of the
drivers should be reduced in this case.
4) Under-voltage monitoring for protecting the power semiconductors. The voltage refers to the local
supply voltage VPOS. However, this corresponds approximately to the voltage at VDC with respect
to GND.
5) The input levels must never exceed the limits of the supply voltage (i.e. between GND and VDD),
otherwise latch-up of the integrated circuits LDI001 can occur. Particular care must be taken when
driving via cables or longer leads. See also application note AN-9901 on www.IGBT-Driver.com.
6) The gate current must be limited to its maximum value by a gate resistor.
7) First value: At a load of 94nF in series with 1.95Ω. Second value: At a load of 660nF in series with
0.6 Ω
8) Maximum continuous or repeatedly applied DC voltage or peak value of the repeatedly applied AC
voltage between all inputs and all outputs. However, types that have been measured and selected
for higher partial-discharge voltages are also available (see note 11).
9) This specification guarantees that the drive information will be transferred reliably even at a high
DC-link voltage and fastest switching operations.
10) The application-specific self-heating of the drivers – especially at high load – must be taken into
account.
11) The partial discharge is not measured for the standard types. Tested and selected types with
guaranteed partial-discharge immunity can be supplied for applications with maximum
requirements and higher operating voltages (such as railroad applications).
12) The test voltage of 4000 Vac(rms)/50Hz may be applied only once during one minute. It should be
noted that with this (strictly speaking obsolete) test method, some (minor) damage occurs to the
insulation layers due to the partial discharge. Consequently, this test is not performed at CONCEPT
as a series test. In the case of repeated insulation tests (e.g. module test, equipment test, system
test), the subsequent tests should be performed with a lower test voltage: the test voltage is
reduced by 400V for each additional test. The more modern if more elaborate partial-discharge
measurement is better suited than such test methods as it i s almost entirely non-destructive.
13) The typical blocking time after an error is 1 second. If required, versions with other blocking times
may also be supplied.
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 9
Application Hints
IMPORTANT INFORMATION
This data sheet contains only product-specific data. All data that apply to the whole
type series of SCALE drivers are given in the document entitled: “Description and
Application Manual for SCALE Drivers”. In particular, this manual contains a
detailed description of the concept of the SCALE drivers, a description of the function of
all terminal pins as well as other important application hints.
Note: As the 1SD1548AI UL is a single-channel driver, the LDI always operates in direct
mode.
Overview and application
The SCALE driver 1SD1548AI UL is a single-channel driver for IGBTs. The 1SD1548AI
UL combines compact mechanical dimensions and a simple electrical interface with very
high output currents, very high drive power and a special high insulation. This driver
can thus be used in almost all conceivable applications, especially for parallel-driving
high-power IGBT modules with reverse voltages up to 1700V.
Output power and self-heating
The specified output power of the driver totals 15W. This typically suffices to drive a
1200A/1200V IGBT module with 40kHz. In the case of a drive power of 15W, the typical
input power of the driver is about 18W; the losses due to the driver total about 3W.
Because CONCEPT cannot predict how the drivers will be incorporated in the user’s
application, no binding recommended value for self-heating and thus for the maximum
useful output power at high ambient temperatures can be given. It is consequently
recommended to check the self-heating of the system, especially when it is used at
higher temperatures and if the driver is used with short pulses (on-time or off-time<
1.5 μs) continuously.
For calculating the exact output power, reference should be made to Application Note
AN-9701 “IGBT drivers correctly calculated” on www.igbt-driver.com/go/app-note.
1SD1548AI UL
Data Sheet
Page 10 INTELLIGENT POWER ELECTRONICS
Collector sense and dimensioning of Rth
The 1SD1548AI UL driver has a collector-sense circuit to protect the power semicon-
ductors. It is shown in Fig. 4.
Its basic operating mode can be obtained from the brochure entitled: “Description and
Application Manual for Scale Drivers”.
To correspond more effectively to the turn-on characteristic of the IGBTs, the SCALE
drivers do not use a static reference voltage to compare the voltage at the collector.
Instead, the reference is used as shown in Fig. 5.
Fig. 4 Collector-sense circuit principle
In order to ensure that the 1SD1548AI UL can be applied as universally as possible, the
components Ca (response time capacitor) and Rm (attenuation resistor) are not
integrated in the driver as shown in Fig. 4, but must be connected externally. Whereas
Ca can be matched to the specific application, a standard value of 180Ω is
recommended for Rm. The ground terminal of Ca should be connected to the COM pin.
Rm
180R
Ca
C
Rth
G
E
Rth
RG
Dm
(2 x 1N4007)
SCALE Driver 1SD1548AI
150uA1,4mA
OVERCURRENT
MEASURING
+VPOS+VPOS
External Circuit
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 11
Notes on Table 1
The values for “Vth1” and “Vth2” are
listed in Table 1 as a function of the
reference resistance Rth.
The value in the “Vth1” column cor-
responds to the voltage threshold
after the response time has elapsed.
The value in the “Vth2” column cor-
responds to the voltage which is set
up statically across the resistor Rth.
This static value is typically reached
after between 10 and 15 μs.
The value in the VCE(off) column
corresponds to the collector-emitter
voltage value at which the protection
function is activated when the
external circuit is used as shown in
Fig. 4 with one or two Dm diodes of
type 1N4007 connected in series.
A value of 1n5 is used for the
response time capacitor Ca. If this
capacitor is rated higher or lower, the
response time changes in proportion
to the change in capacitance, whereas
the thresholds Vth1 and Vth2 remain
practically unchanged (they are
specified by Rth).
Value Rth Response
time Vth1 Vth2 VCE(off)
22k ≈ 4.9μs ≈ 4.8V ≈ 3.2V 2.35V (1 diode)
27k ≈ 5.7μs ≈ 5.6V ≈ 3.9V 3.05V (1 diode)
33k ≈ 6.8μs ≈ 6.5V ≈ 4.7V 3.25V (2 diodes)
39k ≈ 7.6μs ≈ 7.3V ≈ 5.6V 4.15V (2 diodes)
47k ≈ 9μs ≈ 8.4V ≈ 6.8V 5.35V (2 diodes)
Table 1 Reference resistor, response time and turn-off threshold with Ca = 1n5
+Vdc
0V
Vth
Response time
Detail view
Detail
0V
Vce
Vth1
Vce Vth2
Fig. 5 Collector-sense voltage curve
1SD1548AI UL
Data Sheet
Page 12 INTELLIGENT POWER ELECTRONICS
Double or multiple pins
Due to the high power and output current and to provide low-inductance
interconnections, several pins are present in duplicate or as multiples. It is strictly
recommended to connect these in parallel on the layout so that the voltage drop across
the lead frames (contact pins) is minimized.
Moreover, input pins 21 and 22 must also be connected to VDC.
Special terminal pins
The 1SD1548AI UL driver is optimized for universal use and high driver performance
and thus contains more terminal pins than the compact SCALE drivers. These pins will
be described below:
VPOS, COM and VNEG pins: external support capacitor
Like the compact SCALE drivers, the 1SD1548AI UL also has blocking capacitors on the
secondary side of the DC/DC converter. IGBTs with gate charges up to 12μC
(corresponding typically to about a 1200V/1200A module) can be driven without
external blocking capacitors. At higher gate charges, external blocking capacitors are
required between VPOS – COM and COM – VNEG. These capacitors should be rated
between 10 and 42μF (but not more than 84 μF) with a dielectric strength of 20V. It is
important for the capacitors to be suitable for switched-mode power supply applications
(low inductance and high current handling capability). They must be connected as
closely as possible to the driver’s terminal pins with minimum inductance.
The anode of the capacitor is connected to VPOS (COM), its cathode to COM (VNEG).
VDC and GND pins: supply for DC/DC converter
It is recommended to connect a blocking capacitor of approximately 220μF to the driver
input. This capacitor should also be of the switched-mode power supply type.
Pin LS: Local status
The status of the IGD 001 is available at this output. It is an open-collector output to
which approximately 5mA may be applied. A LED can be connected here, for example,
as shown in Fig. 6. The LED lights up in normal operation (everything OK) and goes out
when the driver detects an undervoltage or during the blocking time.
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 13
3k3
SCALE Driver
VPOS
LS
LED OK
Insulated +16V
Ds
COM
Fig. 6 Status display with LED at pin LS
Caution:
The Schottky diode Ds should not be omitted if the local status output is used. If the
local status output is not used, LS should be connected to COM in order to increase the
noise immunity of the driver.
Pin AC: Enhanced active clamping
Pin AC allows the basic active clamping function of the driver to be improved (see
Fig. 1). If it is not used, it should be connected to VNEG.
As the appropriate dimensioning of improved active clamping is complex, time-
consuming and not necessary for most applications, CONCEPT does not support this
feature. However, if this function should be required, or for more information, please
contact CONCEPT’s technical support.
Configuration within the power section
The drivers should be located as closely as possible to the power transistors. The
connecting leads to the transistors should be as short as possible and as low inductance
as possible, i.e. they can be up to 3 cm to 10 cm long depending on the gate current
and switching speed.
1SD1548AI UL
Data Sheet
Page 14 INTELLIGENT POWER ELECTRONICS
If you need any help, simply call our technical support
CONCEPT provides expert help with your questions and problems:
www.IGBT-Driver.com/go/support
Quite Special: Customized SCALE Drivers
If you need an IGBT driver that is not included in the delivery range, please don’t
hesitate to contact CONCEPT or your CONCEPT sales partner.
CONCEPT engineers have more than 20 years experience in the development and
manufacture of intelligent gate drivers for power MOSFETs and IGBTs and have already
implemented a large number of customized solutions.
Important Notice
The data contained in this product data sheet is intended exclusively for technically
trained staff. Handling all high-voltage equipment involves risk to life. Strict compliance
with the respective safety regulations is mandatory!
Any handling of electronic devices is subject to the general specifications for protecting
electrostatic-sensitive devices according to international standard IEC 747-1, Chapter IX
or European standard EN 100015 (i.e. the workplace, tools, etc. must comply with
these standards). Otherwise, this product may be damaged.
Legal Disclaimer
This data sheet specifies devices but cannot promise to deliver any specific
characteristics. No warranty or guarantee is given – either expressly or implicitly –
regarding delivery, performance or suitability.
CT-Concept Technologie AG reserves the right to make modifications to its technical
data and product specifications at any time without prior notice. The general terms and
conditions of delivery of CT-Concept Technologie AG apply.
1SD1548AI UL
Data Sheet
IGBT-Driver.com Page 15
Ordering Information
The general terms and conditions of delivery of CT-Concept Technologie AG apply.
Type designation Description
1SD1548AI UL UL Compliant Single-Channel SCALE Driver Core
Information about Other Products
For other drivers, product documentation, and application support
Direct link: Please click: www.IGBT-Driver.com
Manufacturer
CT-Concept Technologie AG
Intelligent Power Electronics
Renferstrasse 15
CH-2504 Biel-Bienne
Switzerland
Tel. +41 - 32 - 344 47 47
Fax +41 - 32 - 344 47 40
E-mail Info@IGBT-Driver.com
Internet www.IGBT-Driver.com
© Copyright 2003…2009 by CT-Concept Technologie AG - Switzerland. All rights reserved.
We reserve the right to make any technical modifications without prior notice. Version from 2009-09-15
