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CXHA31126 Dual Channel Inverting Output Motor Driver Chip Details and Application Guide

CXHA31126 is a dual-channel inverted output driver chip designed for driving miniature vibration motors. The chip has the function of automatic work, no external components, after power-on can be output alternating inverted square wave signal, widely used in mobile phones, smart wearable devices, timers, massagers and other products in the vibration module. This article will introduce its functional characteristics, electrical parameters, packaging information and practical application circuit in detail, providing a comprehensive technical reference for engineers.Dt5嘉泰姆

1. product overview and functional characteristics

The CXHA31126 uses a SOT23-5 package, small size, high integration, suitable for space-constrained application scenarios. After the chip is powered on, it starts automatically, and the 01 and 02 pins output square wave signals in an inverted manner to drive the motor to achieve a vibration effect. Its main features include:Dt5嘉泰姆

1.1. Wide voltage working range2.4V ~ 5.0V, compatible with a variety of battery-powered systems;Dt5嘉泰姆

1.2. High output withstand voltage: 01 and 02 ports have a maximum withstand voltage of 6V and high reliability;Dt5嘉泰姆

1.3. Automatic alternate output: After power-on, 01 and 02 automatically output alternately with 6.13ms cycle and 2.59ms pulse width;Dt5嘉泰姆

1.4. Low static power consumption: Quiescent current as low as 150 μA when there is no load, energy saving and high efficiency;Dt5嘉泰姆

1.5. Anti-ESD design: With 4000V HBM and 400V MM electrostatic protection capability.Dt5嘉泰姆

2. Pin Function and Package Description

The chip is packaged in SOT23-5 and the pins are defined as follows:Dt5嘉泰姆

Attention: The GND pins (2 and 5) must be grounded, otherwise the chip will not work properly.Dt5嘉泰姆

3. electrical characteristics and operating conditions

3.1. Extreme working conditions

(1) The chip works for a long time under the above-mentioned limit parameters, which may cause the reliability of the device to be reduced or permanently damaged.Dt5嘉泰姆
It is not recommended that any of these limits be reached or exceeded for practical use.Dt5嘉泰姆
(2) All voltage values are tested relative to the system ground.Dt5嘉泰姆

3.2. Recommended working conditions

3.3. Electrical characteristics (VDD = 3.3V, Temp = 27 ℃)

4. working principle and output waveform

The CXHA31126 starts to work immediately after power on, and the 01 and 02 pins output inverted square waves. Specific timing is as follows:Dt5嘉泰姆
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4.1.01 When outputting high level, 02 outputs low level;Dt5嘉泰姆

4.2. After 2.59ms, 01 becomes low level;Dt5嘉泰姆

4.3. After 480μs interval, 02 jumps to high level;Dt5嘉泰姆

4.4. This cycle forms an alternating drive signal to push the motor to vibrate.Dt5嘉泰姆

5. Typical Application Circuit

The diagram below shows a typical application circuit diagram of the CXHA31126. Just connect the motor between 01 and 02, connect VDD to the positive pole of the power supply, and ground GND. No external resistors, capacitors, or inductors are needed, greatly simplifying system design.Dt5嘉泰姆

After the chip is powered on, O1 and O2 pins automatically output square wave signals with period T and pulse width Ton. When O1 output is high, O2
for low. Similarly, when O1 changes to low level after passing through a pulse width Ton, O2 jumps
High. So always cycle drive motor work. Figure 3 is a practical circuit.

6. Package Size (SOT23-5)

The CXHA31126 is packaged in SOT23-5 with the following dimensions (unit: mm / inch):Dt5嘉泰姆

Precautions for the use of 7.

7.1. Electrostatic Protection: The chip is an electrostatic sensitive device, it is recommended to use anti-static measures in a dry environment;Dt5嘉泰姆

7.2. Welding process: It is recommended to use reflow soldering or soldering iron temperature not exceeding 260 ℃, and soldering time not exceeding 5 seconds;Dt5嘉泰姆

7.3. Power supply filtering: If the power supply noise is large, it is recommended to add 0.1μF ceramic capacitor between VDD and GND;Dt5嘉泰姆

7.4. Motor matching: Please ensure that the working current of the motor does not exceed 150mA to avoid damage to the chip.Dt5嘉泰姆

8. epilogue

CXHA31126 with its high integration, low power consumption, no external components, become the ideal choice for micro vibration motor drive. Its automatic inverting output feature simplifies system design and is widely used in consumer electronics, smart home, medical equipment and other fields. Developers can refer to the electrical parameters and application circuits provided in this article to quickly realize product design.Dt5嘉泰姆

IX. Related ProductsDt5嘉泰姆

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