CXHA31127 is a dual channel inverting output driver chip designed specifically for high-frequency vibration motors. This chip has an automatic start stop function, does not require external components, and can output alternating inverted square wave signals after power on. It is widely used in vibration modules of products such as mobile phones, smart wearable devices, timers, massagers, etc. This article will comprehensively analyze its functional characteristics, electrical parameters, packaging information, and practical application circuits, providing reliable technical references for engineers.
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[ CXHA31127 ]"
CXHA31127 Dual Channel Inverted Output Motor Driver Chip Detailed Explanation and Application Guide
CXHA31127 is a dual channel inverting output driver chip designed specifically for high-frequency vibration motors. This chip has an automatic start stop function, does not require external components, and can output alternating inverted square wave signals after power on. It is widely used in vibration modules of products such as mobile phones, smart wearable devices, timers, massagers, etc. This article will comprehensively analyze its functional characteristics, electrical parameters, packaging information, and practical application circuits, providing reliable technical references for engineers.
1、 Product Overview and Functional Features
CXHA31127 adopts SOT23-5 packaging, with high integration and small size, suitable for applications with limited space. After the chip is powered on, it automatically starts up, and pins 01 and 02 output square wave signals in reverse phase to drive the motor to achieve high-frequency vibration effect. Its main features include:
1.1. Wide voltage operating range：2.4V～5.0V， Compatible with multiple battery powered systems;
1.2. High output withstand voltagePorts 01 and 02 have a maximum voltage resistance of 6V and strong reliability;
1.3. Automatic Alternating OutputAfter power on, 01 and 02 automatically output alternately with a 4.87ms cycle and a 2.06ms pulse width;
1.4. Low static power consumptionWhen there is no load, the static current is as low as 150 mA, which is energy-saving and efficient;
1.5. Strong ESD resistance capabilityEquipped with electrostatic protection levels of 4000V HBM and 400V MM.
2、 Pin Function and Packaging Description
The chip adopts SOT23-5 packaging, and the pin definitions are as follows:
| Pin name | pin number | type | Instructions |
|---|---|---|---|
| 01 | one | I/O | Output 1, cycle 4.87ms, pulse width 2.06ms |
| GND | two | - | power ground |
| 02 | three | I/O | Output 2, alternate with 01 in reverse phase output |
| VDD | four | - | positive power terminal |
| GND | five | - | power ground |
AttentionThe GND pins (2 and 5) must be grounded, otherwise the chip cannot function properly.
3、 Electrical characteristics and working conditions
1. Extreme working conditions
| parameter | symbol | limit value | unit |
|---|---|---|---|
| power supply voltage | VDD | -0.5~6.0 | V |
| Output terminal withstand voltage | O1,O2 | six | V |
| Work completion temperature | T_j | -40~150 | ℃ |
| ESD (HBM) | - | four thousand | V |
| ESD (MM) | - | four hundred | V |
2. Recommended working conditions
| parameter | symbol | minimum | typical value | maximum | unit |
|---|---|---|---|---|---|
| power supply voltage | VDD | two point four | three point three | five point five | V |
| Operating Temperature | Ta | -40 | twenty-seven | +85 | ℃ |
3. Electrical characteristics (VDD=3.3V, Temp=27 ℃)
| parameter | symbol | condition | typical value | unit |
|---|---|---|---|---|
| Pull up output current | Iu | VDS=0.4V | one hundred and fifty | mA |
| Pull down output current | Id | VDS=0.2V | one hundred and fifty | mA |
| Static power consumption (no load) | IDD | - | two hundred and twenty | μA |
4. Oscillation and switching characteristics
| parameter | symbol | typical value | unit |
|---|---|---|---|
| Output cycle | T | four point eight seven | ms |
| output frequency | fT | two hundred and five | Hz |
| Output pulse width | Ton | two point zero six | ms |
| Output rise time | Tr | twelve | ns |
| Output descent time | Tf | thirty-four | ns |
| output interval | Toff | three hundred and eighty-one | μs |
4、 Working principle and output waveform
CXHA31127 starts working immediately after power on, with inverted square waves output from pins 01 and 02. The specific timing is as follows:
4.1.01 outputs high level, 02 outputs low level;
4.2. After 2.06ms, 01 becomes low level;
4.3. After a 381μ s interval, 02 jumps to high level;
4.4. This cycle forms alternating driving signals, driving the motor to vibrate at high frequencies.
5、 Typical Application Circuit
The following figure shows a typical application circuit diagram of CXHA31127. Simply connect the motor between 01 and 02, with VDD connected to the positive pole of the power supply and GND grounded. No need for external resistors, capacitors, or inductors, greatly simplifying system design.
After the chip is powered on, the O1 and O2 pins automatically output square wave signals with a period of T and a pulse width of Ton. When the O1 output is high, O2
For low. Similarly, when O1 transitions to a low level after a pulse width Ton, O2 then jumps to a low level after an output interval Toff
High. This keeps cycling to drive the motor to work. Figure 3 shows the actual application circuit.
6、 Package size (SOT23-5)
CXHA31127 adopts SOT23-5 packaging, with specific dimensions as follows (unit: mm/inch):
| symbol | minimum | maximum | Minimum (inch) | Maximum (inch) |
|---|---|---|---|---|
| A | zero point seven zero zero | zero point nine zero zero | zero point zero two eight | zero point zero three five |
| A1 | zero | zero point one zero zero | zero | zero point zero zero four |
| b | zero point three five zero | zero point five zero zero | zero point zero one four | zero point zero two zero |
| e | 0.95BSC | - | 0.037BSC | - |
| E1 | two point six five zero | two point nine five zero | zero point one zero four | zero point one one six |
7、 Precautions for use
7.1. Electrostatic protectionThe chip is an electrostatic sensitive device, and it is recommended to use anti-static measures in a dry environment;
7.2. Welding processIt is recommended to use reflow soldering or soldering iron with a temperature not exceeding 260 ℃ and a soldering time not exceeding 5 seconds;
7.3. Power filteringIf the power supply noise is high, it is recommended to add a 0.1 μ F ceramic capacitor between VDD and GND;
7.4. Motor matchingPlease ensure that the working current of the motor does not exceed 150mA to avoid damaging the chip.
8、 Conclusion
CXHA31127 is an ideal choice for driving high-frequency vibration motors due to its high integration, low power consumption, and no need for external components. Its automatic reverse output feature simplifies system design and is widely used in fields such as consumer electronics, smart homes, medical equipment, etc. Developers can refer to the electrical parameters and application circuits provided in this article to quickly implement product design.
Nine Related Products
| sensor | |||||
| model | detection method | detection distance | Output configuration | Drive Type | remark |
| CXHA31125 | Light blocking groove type | 5mm (slot width) | The light blocking indicator can be turned on by connecting port L (+) to select the light transmitting indicator | NPN | photoelectric sensor |
| CXHA31125A | Light blocking groove type | 5mm (slot width) | The light blocking indicator can be turned on by connecting port L (+) to select the light transmitting indicator | NPN | photoelectric sensor |
| CXHA31125B | Light blocking groove type | 5mm (slot width) | The light blocking indicator can be turned on by connecting port L (+) to select the light transmitting indicator | NPN | photoelectric sensor |
| model | Working Voltage | Port withstand voltage | PWM cycle | package form | |
| CXHA31126 | 2.4V-5V | 6V | 6.13ms | SOT23-5 | vibration sensor |
| CXHA31127 | 2.4V-5V | 6V | 4.87ms | SOT23-5 | vibration sensor |
| CXHA31128 | 2.8V-9.5V | - | - | SOP8/SOT23-6 | vibration sensor |
| CXHA31129 | 2.7V-5.2V | - | Adjustable duty cycle | SOT23-6/DFN6H | vibration sensor |
| CXHA31130 | 2.7V-5.2V | - | Frequency adjustable | SOT23-6/DFN6H | vibration sensor |
| CXHA31131 | 2.7V-5.2V | - | I2C control | MSOP10/SSOP10/QFN3*3 | vibration sensor |
| model | Working Voltage | Number of interfaces | Number of driving buttons | package form | |
| CXHA31132 | 2.2V-5.5V | 2. 4 | eight | SOP16 | Touch sensor |
| CXHA31132S | 2.2V-5.5V | two | 8 (Supports slider function) | SOP16 | Touch sensor |
| CXHA31133 | 2.2V-5.5V | two | eight | SOP16 | Touch sensor |
| CXHA31134 | 2.8V-3.6V | four | twenty-eight | QFN40 | Touch sensor |
| CXHA31135 | 2.8V-3.6V | four | thirty-six | QFN48 | Touch sensor |
