ISO7741TA-Q1, ISO7741TB-Q1
SLLSFW9 – APRIL 2024
ISO7741Tx-Q1 Automotive, High-Speed, Reinforced Quad-Channel Digital Isolator
With Integrated Transformer Driver
1 Features
3 Description
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Qualified for automotive applications AEC-Q100
qualified with the following results:
Device temperature Grade 1: –40°C to 125°C
ambient operating temperature
Functional Safety-Capable
The ISO7741T-Q1 is a grade 1, high-performance,
quad-channel digital isolator with integrated
transformer driver with 5000VRMS isolation ratings per
UL 1577. This reinforced insulation ratings according
to VDE, CSA, TUV and CQC.
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100Mbps data rate
Robust isolation barrier:
The
ISO7741T-Q1
device
provide
high
electromagnetic immunity and low emissions at
low power consumption, while isolating CMOS or
LVCMOS digital I/Os. Each isolation channel has a
logic input and output buffer separated by a double
capacitive silicon dioxide (SiO2) insulation barrier. If
the input power or signal is lost, default output is high
for devices without suffix F and low for devices with
suffix F. See the Device Functional Modes section for
further details.
– >30-year projected lifetime at 1500VRMS
working voltage
– 5000VRMS rating
– Up to 12.8kV surge capability
– ±100kV/μs typical CMTI for digital isolator
Wide supply range: 2.25V to 5.5V
2.25V to 5.5V level translation
Default output high (ISO7741T) and low
(ISO7741FT) options
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The ISO7741T-Q1 has a low-noise, low-EMI push-
pull transformer driver, specifically designed for small
form factor, isolated power supplies. The device
drives low-profile, center-tapped transformers from
a 2.25V to 5.5V DC power supply. Very low noise
and EMI are achieved by slew rate control of the
output switch voltage and through Spread Spectrum
Clocking (SSC). The ISO7741T-Q1 consists of an
oscillator followed by a gate drive circuit that provides
the complementary output signals to drive ground-
referenced N-channel power switches. The device
includes two 1A Power-MOSFET switches to provide
start-up under heavy loads. The internal protection
features include a 1.7A current limiting, under-voltage
lockout, thermal shutdown, and break-before-make
circuitry. ISO7741T-Q1 include a soft-start feature
that prevents high inrush current during power up
with large load capacitors. ISO7741TA-Q1 has a
160kHz internal oscillator for applications that need
to minimize emissions whereas ISO7741TB-Q1 has a
420kHz internal oscillators for applications that require
higher efficiency and smaller transformer size.
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Low power consumption, typical 1.5mA per
channel at 1Mbps
Low propagation delay: 10.7ns typical
(5V Supplies)
Robust electromagnetic compatibility (EMC)
– System-level ESD, EFT, and surge immunity
– ±8kV IEC 61000-4-2 contact discharge
protection across isolation barrier
Safety-related certifications (Pending):
– DIN EN IEC 60747-17 (VDE 0884-17)
– UL 1577 component recognition program
– IEC 61010-1, IEC 62368-1, IEC 60601-1, and
GB 4943.1 certifications
Push-pull driver for transformers
High output drive: 0.7A at 5V supply
Low RON 0.4Ω max at 4.5V supply
Spread spectrum clocking
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1.7A Current-limit
2 Applications
Hybrid, electric and powertrain system (EV/HEV)
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Battery management system (BMS)
On-board charger
Traction inverter and motor control
DC/DC converter
The ISO7741Tx-Q1 is available in a 16-pin DW
package. The device operation is characterized for a
temperature range from -40°C to 125°C.
Body electronics
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Automotive parking heater module
HVAC control module
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change
without notice.
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