高性能ACS732和ACS733电流传感器：适用于高频电流检测

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"ACS732和ACS733是Allegro公司推出的新型高带宽电流传感器集成电路，适用于DC/DC转换器和其他开关电源应用中的高速电流测量。它们提供了紧凑、快速且精确的电流感应解决方案，具有高隔离度、高带宽的霍尔效应基础，并具备用户可配置的过电流故障检测功能。这些特性使得它们成为高电压应用中高频变压器和电流互感器的理想替代品。" ACS732和ACS733电流传感器系列主要特点： 1. **高带宽和快速响应**：1MHz的带宽和210nS的快速响应时间确保了在高频开关应用中的高效性能，能够应对高频率的电流变化。 2. **降低成本和缩小PCB面积**：相较于传统的大型电流互感器，这些传感器能降低整体的物料清单（BOM）成本和印刷电路板（PCB）空间，提高设计的紧凑性和经济性。 3. **隔离额定值**：提供两种不同隔离等级的封装——LA和MA。LA封装提供3600VRMS 60秒隔离额定值，适用于高达616V AC RMS或870Vpk或VDC的电压轨；而MA封装则有4800VRMS 60秒隔离额定值，适用于高达1097VRMS或1550Vpk或VDC的电压轨，为高电压应用提供安全保障。 4. **差分检测**：通过差分检测技术，传感器可以抑制外部共模场干扰，确保电流测量的准确性。 5. **高精度和优化**：设备内部经过校准，出厂前已进行优化，确保高精度测量。通过霍尔传感器和内部铜传导路径的磁场感应，输出信号与通过电流成正比，导电路径的内部电阻小于1mΩ，减少了功率损耗，提高了应用效率。 6. **封装兼容性**：采用100%雾锡电镀的SOP16宽体封装，与标准无铅（Pb）PCB组装工艺兼容，符合环保要求。这些传感器广泛应用于各种市场领域，如汽车、工业、商业和通信系统，特别适合于电机控制、负载检测管理、开关模式电源和过电流保护等应用。通过其创新的设计和高性能特性，ACS732和ACS733为现代电子系统提供了高效且可靠的电流监测解决方案。

1 MHz Bandwidth, Galvanically Isolated

Current Sensor IC in SOIC-16 Package

ACS732 and

ACS733

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Characteristic Symbol Test Conditions Min. Typ.

[1]

Max. Unit

OVERCURRENT FAULT CHARACTERISTICS

FAULT Response Time

[5]

RESPONSE(F)

Time from I

> I

FAULT

to when FAULT pin is

pulled below V

FAULT

; input current step from 0

to 1.2 × I

FAULT

0.2 0.5 0.75 μs

FAULT Release Time

[5]

C(F)

Time from I

falling below I

FAULT

– I

HYS

when V

FAULT

is pulled above V

FAULTL

;

100 pF from FAULT to ground

0.1 – 0.45 µs

FAULT Range I

FAULT

Relative to the full scale of I

; set via the

VOC pin

0.5 × I

– 2 × I

FAULT Output Low Voltage V

FAULT

In fault condition; R

F(PULLUP)

= 10 kΩ – – 0.4 V

FAULT Pull-Up Resistance R

F(PULLUP)

10 – 500 kΩ

FAULT Leakage Current I

FAULT(LEAKAGE)

– ±2 – nA

FAULT Hysteresis

[6]

HYST

– 0.05 × I

– A

FAULT Error

[7]

FAULT

Tested at V

VOC

= 0.2 × V

FAULT

threshold

= 100% × I

)

– ±5 – %

Input Range V

VOC

0.1 × V

– 0.4 × V

Input Current I

VOC

– 10 100 nA

[1]

Typical values are mean ± 3 sigma values.

[2]

Use of a bypass capacitor is required to increase output stability.

[3]

See denitions of Dynamic Response Characteristics section of this datasheet.

[4]

The sensor will continue to respond to current beyond the range of I

until the high or low output saturation voltage. However, the nonlinearity in this region may be

worse than the nominal operating range.

[5]

Guaranteed by design.

[6]

After I

goes above I

FAULT

, tripping the internal comparator, I

must fall below I

FAULT

– I

HYST

, before the internal comparator will reset.

[7]

Fault error is dened as the value at which a fault is reported relative to the desired threshold for I

FAULT

COMMON ELECTRICAL CHARACTERISTICS (continued): Over full range of T

, over supply voltage range V

CC(MIN)

through

CC(MAX)

of a sensor variant, C

BYPASS

= 0.1 µF, unless otherwise specied

1 MHz Bandwidth, Galvanically Isolated

Current Sensor IC in SOIC-16 Package

ACS732 and

ACS733

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ACS732KLATR-20AB PERFORMANCE CHARACTERISTICS: Valid at T

= –40°C to 125°C, V

= 5 V, C

BYPASS

= 0.1 µF,

unless otherwise specied

Characteristic Symbol Test Conditions Min. Typ.

[1]

Max. Unit

NOMINAL PERFORMANCE

Current Sensing Range I

–20 – 20 A

Sensitivity Sens – 100 – mV/A

Zero Current Output Voltage V

IOUT(Q)

– 0.5 × V

– V

TOTAL OUTPUT ERROR COMPONENTS

[2]

TOT

= E

SENS

+ 100 × V

/ (Sens × I

)

Total Output Error

[3]

TOT

= I

PR(max)

, T

= 25°C –2.5 ±1.6 2.5 %

= I

PR(max)

, T

= 125°C –3 ±2 3 %

= I

PR(max)

, T

= –40°C –7.5 ±4.5 7.5 %

Sensitivity Error E

SENS

= I

PR(max)

, T

= 25°C –1.5 ±0.75 1.5 %

= I

PR(max)

, T

= 125°C –1.5 ±1.25 1.5 %

= I

PR(max)

, T

= –40°C –3 ±2 3 %

Offset Voltage Error V

= 0 A, T

= 25°C –55 ±30 55 mV

= 0 A, T

= 125°C –25 ±18 25 mV

= 0 A, T

= –40°C –120 ±100 120 mV

LIFETIME DRIFT CHARACTERISTICS

[4]

Total Output Error Including Lifetime Drift E

TOT(DRIFT)

= I

PR(max)

, T

= 25°C to 125°C –5.5 ±2.8 5.5 %

= I

PR(max)

, T

= –40°C to 25°C –10 ±4.4 10 %

Sensitivity Error Including Lifetime Drift E

SENS(DRIFT)

= I

PR(max)

, T

= 25°C to 125°C –2.7 ±2.1 2.7 %

= I

PR(max)

, T

= –40°C to 25°C –4 ±3.7 4 %

Offset Voltage Error Including Lifetime Drift V

OE(DRIFT)

= 25°C to 125°C –67 ±42 67 mV

= –40°C to 25°C –120 ±93 120 mV

[1]

Typical values with ± are mean ±3 sigma values, except for lifetime drift which are the average value including drift after AEC-Q100 qualication.

[2]

A single part will not have both the maximum sensitivity error and the maximum o󰀨set voltage, as that would violate the maximum/minimum total output error

specication. For total error, 3 sigma distribution values for o󰀨set and sensitivity may be combined by taking the square root of the sum of the squares. See characteristic

performance data plots for temperature drift performance.

[3]

Percentage of I

, with I

= I

PR(MAX)

[4]

Lifetime drift characteristics are based on AEC-Q100 qualication results.

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