TI ISOW774x：集成低辐射DC/DC转换器的4通道数字隔离器

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TI-ISOW774x是一款高性能的四通道数字隔离器，专为那些对低辐射、低噪声、高效能和严格电磁兼容性有高要求的应用设计。该产品的主要特点包括： 1. 数据速率高达100Mbps，满足高速数据传输需求，适合于工业自动化、电机控制和电网基础设施等场景。 2. 集成的低辐射、低噪声直流/直流转换器，优化了辐射水平，达到CISPR32和EN55032B类标准，提供超过5dB的裕度，确保在紧凑的2层电路板上仍能保持良好的电磁兼容性。低频电源转换器（25MHz）有助于降低噪声。 3. 输出功率高效，最大负载时效率可达46%，支持高达0.55W的输出，并提供了针对不同电压等级（5V-5V、5V-3.3V、3.3V-3.3V）的最大可用负载电流，如5V至5V下最大110mA，3.3V至3.3V下最大60mA。 4. 提供独立的逻辑电源（VIO）和电源转换器电源（VDD），分别支持1.71V至5.5V和3V至5.5V，满足不同电路需求。 5. 具有优秀的电磁兼容性，包括系统级ESD、EFT和浪涌抗扰性，以及±8kV IEC61000-4-2接触放电保护，确保设备在严苛环境下稳定运行。 6. 提供两种隔离等级——增强型和基础型，增强型具备更高的CMTI（共模瞬变免疫）值，典型值为100kV/μs，满足不同安全等级的需求。 7. 安全相关认证包括VDE DINVDEV0884-11标准下的增强型和基础型绝缘，以及UL1577组件认证，还有IEC62368-1、IEC61010-1、IEC60601-1和GB4943.1-2011标准，保证设备在医疗设备和测试测量领域的合规性。 8. 工作温度范围宽广，从-40°C至+125°C，适应各种环境条件。 9. 采用20引脚宽体SOIC封装，紧凑设计，便于在空间受限的环境中安装和使用。这款数字隔离器能够简化系统设计，减少外部元件数量，是需要高隔离性能、低辐射和高可靠性的应用的理想选择。在选择具体型号时，根据应用所需的保护级别、电压等级和工作电压来确定最适合的产品。

7.6 Insulation Specifications

PARAMETER TEST CONDITIONS VALUE UNIT

GENERAL

CLR External clearance

(1)

Shortest terminal-to-terminal distance through air >8 mm

CPG External creepage

(1)

Shortest terminal-to-terminal distance across the

package surface

>8 mm

DTI Distance through the insulation

Minimum internal gap (internal clearance – capacitive

signal isolation)

> 17

µm

Minimum internal gap (internal clearance –

transformer power isolation)

>120

CTI Comparative tracking index DIN EN 60112 (VDE 0303-11); IEC 60112 > 600 V

Material group According to IEC 60664-1 I

Overvoltage category per IEC 60664-1

Rated mains voltage ≤ 300 V

RMS

I-IV

Rated mains voltage ≤ 600 V

RMS

I-IV

Rated mains voltage ≤ 1000 V

RMS

I-III

DIN VDE V 0884-11:2017-01

(2)

IORM

Maximum repetitive peak isolation

voltage

AC voltage (bipolar) 1500 V

IOWM

Maximum working isolation voltage

AC voltage; Time dependent dielectric breakdown

(TDDB) Test

1000 V

RMS

DC voltage 1500 V

IOTM

Maximum transient isolation voltage

TEST

= V

IOTM

; t = 60 s (qualification);

TEST

= 1.2 × V

IOTM

; t = 1 s (100% production)

7071 V

IOSM

Maximum surge isolation voltage

ISOW774x

(3)

Test method per IEC 62368-1, 1.2/50 µs waveform,

TEST

= 1.6 × V

IOSM

= 10000 V

(qualification)

6250 V

IOSM

Maximum surge isolation voltage

ISOW774xB

(3)

Test method per IEC 62368-1, 1.2/50 µs waveform,

TEST

= 1.3 × V

IOSM

= 7800 V

(qualification)

6000 V

Apparent charge

(4)

Method a, after input/output safety test subgroup 2/3,

ini

= V

IOTM

, t

ini

= 60 s;

pd(m)

= 1.2 × V

IORM

, t

= 10 s

≤ 5

Method a, after environmental tests subgroup 1,

ini

= V

IOTM

, t

ini

= 60 s; ISOW774x: V

pd(m)

= 1.6 ×

IORM

, t

= 10 s, ISOW774xB: V

pd(m)

= 1.2 × V

IORM

, t

= 10 s

≤ 5

Method b1, at routine test (100% production) and

preconditioning (type test),

ini

= 1.2 × V

IOTM

, t

ini

= 1 s;

ISOW774x: V

pd(m)

= 1.875 × V

IORM

, t

= 1

s, ISOW774xB: V

pd(m)

= 1.5 × V

IORM

, t

= 1 s

≤ 5

Barrier capacitance, input to output

(5)

= 0.4 × sin (2πft), f = 1 MHz

~3.5 pF

Insulation resistance

(5)

= 500 V, T

= 25°C > 10

= 500 V, 100°C ≤ T

≤ 125°C

> 10

= 500 V, T

= 150°C > 10

Pollution degree 2

Climatic category 40/125/21

UL 1577

ISO(UL)

Withstand isolation voltage

TEST

= V

ISO(UL)

= 5000 V

RMS

, t = 60 s (qualification),

TEST

= 1.2 × V

ISO(UL)

= 6000 V

RMS

, t = 1 s (100%

production)

5000 V

RMS

(1) Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application.

Care should be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of the

isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become equal in

certain cases. Techniques such as inserting grooves, ribs, or both on a printed circuit board are used to help increase these

specifications.

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ISOW7740, ISOW7741, ISOW7742, ISOW7743, ISOW7744

ZHCSLW2B – SEPTEMBER 2021 – REVISED JANUARY 2022

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(2) ISOW77xx is suitable for safe electrical insulation and ISOW77xxB is suitable for basic electrical insulation only within the safety

ratings.. Compliance with the safety ratings shall be ensured by means of suitable protective circuits.

(3) Testing is carried out in air or oil to determine the intrinsic surge immunity of the isolation barrier.

(4) Apparent charge is electrical discharge caused by a partial discharge (pd).

(5) All pins on each side of the barrier tied together creating a two-terminal device.

7.7 Safety-Related Certifications

VDE CSA UL CQC TUV

Certified according to DIN

VDE V 0884-11:2017-01

Certified according to IEC

62368-1, and IEC 60601-1

Recognized under UL

1577 Component

Recognition Program

Certified according to

GB 4943.1-2011

Certified according to EN

61010-1:2010/A1:2019

and EN 62368-1:2014

Reinforced insulation;

Maximum transient

isolation voltage, 7071

;

Maximum repetitive peak

isolation voltage, 1500

;

Maximum surge isolation

voltage, 6250 V

for

ISOW774x

(Reinforced), 6000

for ISOW774xB

(Basic).

CSA 62368-1-19 and IEC

62368-1:2018 Ed. 3 and EN

62368-1:2020. (pollution degree

2, material group I) 600

RMS

(ISOW774x Reinforced),

1000V

RMS

(ISOW774xB Basic)

maximum working voltage;

2 MOPP (Means of Patient

Protection) per CSA 60601-1:14

and IEC 60601-1 Ed. 3+A1, 250

RMS

maximum working

voltage. Temperature rating is

90°C for reinforced insulation

and 125°C for basic insulation;

see certificate for details.

Single protection, 5000

RMS

Reinforced Insulation,

Altitude ≤ 5000 m,

Tropical Climate, 700

RMS

maximum working

voltage;

5000 V

RMS

Reinforced

insulation per EN 61010-

1:2010 up to working

voltage of 600 V

RMS

;

5000 V

RMS

Reinforced

insulation per EN

62368-1:2014 up to

working voltage of 600

RMS

(ISOW774x

Reinforced), 1000

RMS

(ISOW774xB Basic)

Certificate #: Reinforced:

40040142.

Basic: Pending

Master Contract#: 220991 File #: E181974

Certificate #:

CQC21001297517

Client ID: 77311

7.8 Safety Limiting Values

Safety limiting intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Safety input, output, or supply current

(1)

θJA

= 68.5°C/W, V

= 5.5 V, T

= 150°C,

= 25°C

332

θJA

= 68.5°C/W, V

= 3.6 V, T

= 150°C,

= 25°C

507

Safety input, output, or total power

(1)

θJA

= 68.5°C/W, T

= 150°C, T

= 25°C 1825 mW

Maximum safety temperature

(1)

150 °C

(1) The maximum safety temperature, T

, has the same value as the maximum junction temperature, T

, specified for the device. The I

and P

parameters represent the safety current and safety power respectively. The maximum limits of I

and P

should not be

exceeded. These limits vary with the ambient temperature, T

The junction-to-air thermal resistance, R

θJA

, in the Thermal Information table is that of a device installed on a high-K test board for

leaded surface-mount packages. Use the following equations to calculate the value for each parameter:

= T

+ R

θJA

× P, where P is the power dissipated in the device.

J(max)

= T

+ R

θJA

× P

, where T

J(max)

is the maximum allowed junction temperature.

= I

× V

, where V

is the maximum input voltage.

ISOW7740, ISOW7741, ISOW7742, ISOW7743, ISOW7744

ZHCSLW2B – SEPTEMBER 2021 – REVISED JANUARY 2022

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7.9 Electrical Characteristics - Power Converter

= 5 V ±10% or 3.3 V ±10% and V

ISOIN

power externally, GND1 = GNDIO, GND2 = GISOIN (over recommended

operating conditions, unless otherwise specified)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

= 5 V, V

ISOOUT

= 5 V, V

SEL

= V

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 55 mA 4.75 5 5.25 V

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 110 mA 4.5 5 5.25 V

ISOOUT(LINE

)

DC line regulation I

ISOOUT

= 55 mA, V

= 4.5 V to 5.5 V 2 mV/V

ISOOUT(LOA

DC load regulation I

ISOOUT

= 0 to 110 mA 1%

EFF

Efficiency at maximum load

current

(1)

ISOOUT

= 110 mA, C

LOAD

= 0.01 µF || 10 µF;

= V

(ISOW774x); V

=0 V (ISOW774x

with F suffix).

46%

ISOOUT(RIP)

Output ripple on isolated supply

(pk-pk)

20-MHz bandwidth, C

LOAD

= 0.01 µF || 20 µF,

ISOOUT

= 110 mA

24 mV

ISOOUT_SC

DC current from V

supply

under short circuit on V

ISOOUT

shorted to GND2 250 mA

= 5 V, V

ISOOUT

= 3.3 V, V

SEL

= GND2

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 70 mA 3.135 3.3 3.465 V

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 140 mA 3.135 3.3 3.465 V

ISOOUT(LINE

)

DC line regulation I

ISOOUT

= 70 mA, V

= 4.5 V to 5.5 V 2 mV/V

ISOOUT(LOA

DC load regulation I

ISOOUT

= 0 to 140 mA 1%

EFF

Efficiency at maximum load

current

(1)

ISOOUT

= 140 mA, C

LOAD

= 0.01 µF || 10 µF;

= V

(ISOW774x); V

=0 V (ISOW774x

with F suffix).

36%

ISOOUT(RIP)

Output ripple on isolated supply

(pk-pk)

20-MHz bandwidth , C

LOAD

= 0.01 µF || 20 µF,

ISOOUT

= 110 mA

30 mV

ISOOUT_SC

DC current from V

supply

under short circuit on V

ISOOUT

shorted to GND2 250 mA

= 3.3 V, V

ISOOUT

= 3.3 V, V

SEL

= GND2

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 30 mA 3.135 3.3 3.465 V

ISOOUT

Isolated supply voltage External I

ISOOUT

= 0 to 60 mA 3.135 3.3 3.465 V

ISOOUT(LINE

)

DC line regulation I

ISOOUT

= 30 mA, V

= 3.0 V to 3.6 V 2 mV/V

ISOOUT(LOA

DC load regulation I

ISOOUT

= 0 to 60 mA 1%

EFF

Efficiency at maximum load

current

(1)

ISOOUT

= 60 mA, C

LOAD

= 0.01 µF || 10 µF;

= V

(ISOW774x); V

=0 V (ISOW774x

with F suffix).

43%

ISOOUT(RIP)

Output ripple on isolated supply

(pk-pk)

20-MHz bandwidth, C

LOAD

= 0.01 µF || 20 µF,

ISOOUT

= 60 mA

14 mV

ISOOUT_SC

DC current from V

supply

under short circuit on V

ISOOUT

shorted to GND2 185 mA

(1) Power converter I

LOAD

= current required to power the secondary side. I

LOAD

does not take into account the channel isolator current.

See Supply Current Characteristics Channel Isolator section for details.

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