company blog about INA302A3IPWR: 36V Bidirectional High-Precision Current Sense Amplifier And Overcurrent Protection Solution

INA302A3IPWR: 36V Bidirectional High-Precision Current Sense Amplifier And Overcurrent Protection Solution

Shenzhen Mingjiada Electronics Co., Ltd. – Long-term supplier of the [TI] INA302A3IPWR – a 36V, bidirectional, 550kHz, 4V/µs high-precision current sense amplifier. Product details are as follows:

I. Product Overview and Functional Description
The INA302A3IPWR is a 36V, bidirectional, high-precision current sense amplifier with integrated dual comparators, launched by Texas Instruments (TI). Designed specifically for demanding overcurrent protection and precision current monitoring applications, this device features a 550kHz bandwidth and a 4V/µs slew rate, and is widely used in motor control, server power supplies and telecommunications equipment.
Key Features (INA302A3IPWR):
Bidirectional sensing: Supports precise measurement of both forward and reverse currents, suitable for motor drives and battery charge/discharge management.
Integrated protection: Dual-comparator design; Comparator 1 has a response time of <1 µs, providing rapid hardware-level protection; Comparator 2 supports adjustable delays from 2 µs to 10 s, effectively preventing false triggering.
Flexible High-Side/Low-Side Configuration: Wide common-mode voltage range (-0.1 V to +36 V), independent of supply voltage (2.7 V–5.5 V), allowing deployment at any point in the power path.

II. Key Specifications (INA302A3IPWR)
Electrical Performance
Common-mode voltage range: -0.1 V to +36 V
Supply Voltage (Vs): 2.7 V to 5.5 V
Quiescent Current (Iq): ≤ 950 µA
Amplifier Characteristics
Fixed Gain (A3): 100 V/V
Input Offset Voltage (Vos): ≤ 30 µV (max)
Gain Error: ≤ 0.15% (max)
Bandwidth (-3dB): approx. 550 kHz
Slew Rate (SR): 4 V/µs
Comparator Characteristics
Response Time (CMP1): < 1 µs
Delay Configuration (CMP2): 2 µs to 10 s (set by external capacitor)
Output Type: Open-Drain
Environmental and Packaging
Operating Temperature: -40°C to +125°C
Package: TSSOP-14 (PW)

III. Key Advantages and Features of the INA302A3IPWR
1. Wide common-mode input voltage range
The INA302A3IPWR supports a wide common-mode input voltage range of -0.1 V to +36 V, allowing the device to be flexibly configured for both high-side and low-side current sensing applications, regardless of the device’s operating voltage. This feature is particularly critical for bidirectional applications requiring current monitoring at both the ground and supply rails.
2. Bidirectional Current Sensing Capability
The INA302A3IPWR features bidirectional current sensing, enabling the simultaneous measurement of both forward and reverse currents. In Battery Management Systems (BMS), this means the system can monitor both charging and discharging currents simultaneously, enabling comprehensive charge and discharge management.
3. Dual Integrated High-Speed Comparators
The INA302A3IPWR integrates two independent high-speed comparators, each with the following response capabilities:
Comparator 1: Alarm response time of less than 1 µs, enabling rapid response to transient overcurrent events and maximising protection of downstream circuits.
Comparator 2: Adjustable delay via an external capacitor, with a delay range of 2 µs to 10 s, allowing users to configure settings flexibly according to the system’s tolerance for transient overcurrent.
The overcurrent thresholds for both comparators can be independently adjusted via external limit-setting resistors, offering considerable design flexibility.
4. Flexible Output Modes
The open-drain alarm output supports two configuration modes: transparent mode and latch mode. In transparent mode, the output state follows changes in the input state in real time; in latch mode, the alarm output remains in the alarm state until the latch is reset, making it suitable for applications requiring the logging of abnormal events.
5. Ample Signal Bandwidth and Slew Rate
The INA302A3IPWR offers a signal bandwidth of 550 kHz and a slew rate of 4 V/µs, which is sufficient to meet the requirements for tracking rapidly changing current signals in most industrial and automotive applications.

IV. INA302A3IPWR Application Areas:
Overcurrent protection
Motor control
Power supply protection
Computers and servers
Telecommunications equipment

V. Mingjiada Electronics – Supplier of TI INA302A3IPWR High-Precision Current Sense Amplifier
Shenzhen Mingjiada Electronics Co., Ltd. – with extensive experience in the electronic component distribution sector, the company maintains a stock of over 2 million SKUs, covering a full range of electronic components including MCUs, FPGAs, power semiconductors, memory, sensors, AI chips and 5G communication ICs. For popular models such as the INA302A3IPWR, Mingjiada maintains substantial stock levels and supports both flexible supply models for small-batch samples and large-volume procurement. Leveraging an efficient logistics system, we ensure rapid product delivery.

To check the latest stock levels, pricing or product details for the INA302A3IPWR, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply information.