ISO7741TX-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• 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

• 100Mbps data rate

• Robust isolation barrier:

– >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

• 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

• 1.7A Current-limit

2 Applications

Hybrid, electric and powertrain system (EV/HEV)

• Battery management system (BMS)

• On-board charger

• Traction inverter and motor control

• DC/DC converter

Body electronics

• Automotive parking heater module

• HVAC control module

3 Description

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.

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.

The ISO7741T-Q1 has a low-noise, low-EMI pushpull

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 groundreferenced

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.

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.