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CST6118

CST6118 is a single channel brushed DC motor driver chip. The maximum continuous output current can reach 1.8A, and the peak value can reach 2.5A. CST6118 is equipped with a power MOS full bridge driver, which can drive forward, backward, stop and brake functions. At the same time, it is also equipped with an over temperature protection circuit to ensure the safety of chip operation.
The full bridge drive architecture and driving method, extremely low circuit static power consumption (less than 1uA), low on resistance (0.4 Ω/1000mA), and wide operating voltage range (1.5V~7.2V) can make the application range of CST6118 more extensive.

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CST6118 Introduction:

CST6118 is a single channel brushless DC motor driver chip. The maximum continuous output current can reach 1.8A, and the peak value can reach 2.5A. The chip is equipped with a power MOS full bridge driver, which can drive forward, backward, stop, and brake functions. At the same time, it is equipped with an overtemperature protection circuit to ensure the safety of chip operation。

The full bridge driving architecture and driving method can save peripheral filtering circuits, save costs, and facilitate applications. The extremely small static power consumption of the circuit (less than 1uA) can make the application range of CST6118 more extensive。

CST6118 Advantage:

Adopting a single channel full bridge power drive structure

Working voltage range (1.5V~7V)

Maximum continuous output current can reach 1.8A

Maximum peak output current can reach 2.5A

Including forward/reverse/stop/brake functions

Extremely low quiescent current (typical：0.1uA)

Low ON resistance（0.4Ω/1000mA）

Built in thermal protection function with hysteresis effect (TSD)

Package：SOP8

CST6118 Application:

DC brush motor drive for toys

Electric toothbrush

Smart lock

CST6118 Order Information:

Part No.

Package

Mark*

Tape/Reel

CST6118

SOP8

CST-LOGO: CST6118

TXXXX

4000/Reel

Number	Name	input/output		Pin illustrate
1	NC		--	NC
2	INA		I	Control signal A input terminal
3	INB		I	Control signal B input terminal
4	VDD		I	Power
5	OUTB		O	Drive B output
6	NC		--	NC
7	GND		I	GND
8	OUTA		O	Drive B output

CST6118 Function Description:

Input Logic Truth Table

INA	INB	OUTA	OUTB	Function
L	L	Hi-Z	Hi-Z	Standby
H	L	H	L	Forward
L	H	L	H	Retreat
H	H	L	L	brake

CST6118 Typical waveform:

CST6118 Typical application circuit diagram:

Note: 1. The C4/104P capacitor in the figure is connected in parallel to the motor rather than placed on the PCB. If the motor is not connected in parallel, a position can be reserved on the PCB.。

2. Compared to the general application of similar products in the market, C1, C2, and C3 in the figure can be omitted, reducing peripheral devices and saving costs.

CST6118 Special precautions:

In different applications, C1 and C2 can consider welding only one: in 4.5V applications, it is recommended to use one 1uF or more, using a patch capacitor; It is recommended to use a large capacitance of 220uF+100nF chip capacitor in 6V applications; C1 and C2 should be placed close to the VDD pins of the IC, and the connection between the negative electrode of the capacitor and the GND terminal of the IC should also be as short as possible. Although the capacitor is close, the circuit is wound far away. When there is a large capacitor on the PCB board filtering for other chips and it is far from CST6118, it is also necessary to place a small capacitor on the VDD pin of CST6118 according to the above requirements. The C4 (100nF) capacitor in the figure is preferentially connected to the motor. When it is not convenient to solder this capacitor on the motor, C3 should be soldered onto the PCB。

The general low-voltage application of CST6118 can eliminate C1, C2, and C3 capacitors. If the power supply fluctuates significantly or the output driving current is large, it is recommended to add capacitors C2 and C3. Can be selected according to actual situation。

CST6118 is sensitive to static electricity. Anti static measures need to be taken during packaging, transportation, processing, and other processes。

It is recommended not to exceed the peak value of 2.5A of the chip at the moment of motor startup。

The peak current of motor blockage varies depending on the motor. If the peak current of motor blockage is too large, it may burn out the IC。

CST6118 Package information:

File Name	Format	Download
ChipSourceTek 2020 product color page
CST6118 CHS DataSheet
CST6118 EN DataSheet
ChipSourceTek-2024 Product Color Page List
ChipSourceTek 2023 product color page