ChipSourceTek-CST6116A Overview and features

ChipSourceTek-CST6116A It is a single-channel driver chip designed for brush DC motor, integrated full bridge power MOS tube, support forward, reverse, stop, brake four functions, suitable for low power consumption, high integration of portable equipment. Its core features are as follows:

Key parameters and functions
Driving ability
Maximum continuous output current：1.5A (peak up to 2.1A)10。

on-resistance：High side + low side (HS+LS) only 400mΩ, significantly reducing power consumption and improving efficiency率110。

1. Voltage range and power consumption

   • Operating voltage：2V to 6V, compatible with multiple dry batteries or lithium battery power supply systems统14。

   • Standby current：Typical value 0.1μA, very low static power consumption, suitable for long battery life备12。

2. Protection and reliability
   Overtemperature Protection (TSD)：Built-in thermal protection circuit with hysteresis effect to prevent the chip from being damaged due to high temperature14。

   • Anti-interference design：The full bridge drive architecture reduces the dependence on the peripheral filter circuit and requires only a small chip capacitor for stable operation行410。

3. Package and interface

   • Encapsulation form：SOT23-6, compact size, suitable for space-constrained PCB equipment计12。

   • Control interface：The motor direction and speed are controlled by PWM signal (INA/INB pin)制10。

Application scenario

CST6116A is widely used in the following fields:

1. Toys and models：Such as toy cars, aircraft tail motor drive, support fast response and accurate control制14。

2. Consumer electronics：Electric toothbrushes, electronic locks and other devices that require low power consumption and small volume motors1013。

3. Portable equipment：Battery powered system, relying on its low standby current characteristics to extend battery life24。

Design considerations

1. Power filter

   • It is recommended that 104 capacitors (0.1μF) be connected in parallel between the power supply and the ground. If the power supply fluctuates or the drive current is large, add 10μF to 330μF electrolytic power810。

   • The capacitor should be placed close to the chip pin to reduce the influence of wire impedance on stability1013。

2. Electrostatic protection

   • The chip is sensitive to static electricity. Take ESD measures (such as ESD gloves) during packaging and welding.812。

3. Current limitation

   • When the motor is blocked, it may generate a large instantaneous current. Ensure that the peak value does not exceed 2.1A to avoid core burnout片1012。

Typical application circuit and function block diagram

1. Simplified circuit design

   • Peripheral circuits require only a small number of chip capacitors and do not require complex filtering networks (see illustrative example)410。

   • 100nF capacitor (C4) can be connected to both ends of the motor to suppress electromagnetic interference (EMI)10。

2. Control logic

   • Function switching through input signal (INA/INB) combination:

     • forword：INA= high, INB= low

     • reversal：INA= low, INB= high

     • brake：INA=INB= height

     • stop：INA=INB=low1013。

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Sum up

The ChipSourceTek-CST6116A is ideal for small brush DC motor drives due to its high current drive capability, low on-resistance and compact package. Designed for both efficiency and reliability, it is particularly suitable for portable devices that are sensitive to power consumption and volume. Pay attention to power filter and electrostatic protection during development. For specific parameters, refer to the official data manual or typical application circuit11013。