This post explains for the controller. A DC rotational velocity controller, also known as a DC motor speed controller or DC motor speed regulator, is a device or system used to control the speed or rotational velocity of a DC (direct current) motor. DC motors are commonly used in various applications, and controlling their speed is essential in many industrial, automotive, robotics, and electronic systems. DC rotational velocity controllers are employed to achieve precise control over the motor’s speed, direction, and torque.

The Part Number is GS069.

The function of this semiconductor is DC Rotational Velocity Controller.

The package is SO-8 Pin Type.

Manufacturer: ASIC

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Description

The GS069 DC rotational velocity controller is an application-specific CMOS IC for electrical tools. It features wide power supply voltage range, low power dissipation and high interference immunity.

It controls the rotational speed of electrical tools by changin the output of the VMOS transistor through an external resistor network.

Features

1. Wide power supply voltage range

2. Low power dissipation

3. High interference immunity

4. Wide output range

5. Small frequency variation

 

Applications:

1. Electrical tool switches

GS069 PDF Datasheet

This post explains for the controller. A current mode PWM+PFM controller is a type of integrated circuit (IC) or controller chip used in power supply and voltage regulator circuits to efficiently regulate the output voltage while dynamically switching between Pulse-Width Modulation (PWM) and Pulse Frequency Modulation (PFM) control modes. This combination of control techniques allows for high efficiency over a wide range of load conditions, making it suitable for battery-powered and energy-efficient applications.

The Part Number is SD6864, SD6864P65K67.

The function of this semiconductor is Current Mode PWM+PFM Controller.

The package is SOP 8 Pin Type

Manufacturer: SILAN MICROELECTRONICS

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Description

The SD6864 is current mode PWM+PFM controller with built-in highvoltage MOSFET used for SWPS, with low standby power and low start current for power switch. In standby mode, the circuit enters burst mode to reduce the standby power dissipation. The switch frequency is 25~67KHz with jitter frequency for low EMI. Built-in peak current compensation circuit makes the limit output power stable even with different input AC voltage.

Limit output power can be adjusted through the resistor. Maximum peak current compensation during power-on reduces pressure on transformer to avoid saturation, the peak current compensation will decrease for balance after power-on. It integrates various protections such as undervoltage lockout, overvoltage protection, overload protection, lead edge blanking, primary winding overcurrent protection and thermal shutdown. […]

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Features

1. Energy Star 2.0 standard

2. Lower start-up current (3mA)

3. Various switching frequency following load for the higher efficiency

4. Frequency jitter for low EMI

5. Overvoltage, overcurrent, overload and over temperature protections.

6. Adjustable limit output power

7. Undervoltage lockout

8. Built-in high voltage MOSFET

 

SD6864 PDF Datasheet