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DK1203 Datasheet – Power Supply Control Chip – DongKe

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Part Number: DK1203

Function: Off-line switching power supply control chip

Package: DIP 8 Pin Type

Manufacturer: DongKe

Image

DK1203 Power Supply Control Chip

Description

The DK1203 is Low-power off-line switching power supply control chip.

An off-line switching power supply control chip is an integrated circuit specifically designed for controlling and regulating the operation of an off-line switching power supply. Off-line power supplies are commonly used in applications where the power source is connected directly to the AC mains, such as in desktop computers, televisions, and household appliances.

These control chips are responsible for managing the power supply’s input voltage, providing necessary control signals, and implementing various protection and regulation functions.

  1. Pulse Width Modulation (PWM) Control: These chips generate a PWM signal that controls the switching of the power supply’s primary-side switches, such as MOSFETs or IGBTs. The duty cycle of the PWM signal determines the on-time and off-time of the switches, regulating the output voltage or current.
  2. Voltage Feedback Control: Off-line power supply control chips incorporate feedback control loops to regulate the output voltage. They compare the output voltage with a reference voltage and adjust the PWM signal accordingly to maintain a stable and desired output voltage.
  3. Power Factor Correction (PFC): Many off-line power supply control chips include power factor correction functionality. PFC helps improve the power supply’s input power factor, reducing harmonic distortion and maximizing power efficiency.
  4. Protection Features: These chips provide protection mechanisms to safeguard the power supply and connected components. Common protection features include overvoltage protection, undervoltage lockout, overcurrent protection, overtemperature protection, and short circuit protection.

 

Features

1. Input voltage 85V to 265V full voltage range

2. Built-in 700V power tube

3. Built-in self-powered circuit (patented), no auxiliary winding power supply

4. Integrated self-starting circuit

5. Current mode PWM control

6. VCC operating voltage range of 4V to 6V

7. 65Khz switching frequency

8. Auto-enter skip cycle mode at light load

9. Over-temperature, over-current, over-voltage, overload protection

10. Standby power consumption is less than 0.3W

11. Frequency jitter reduces EMI filtering cost

 

Pinout:

DK1203 datasheet pdf
Applications:

1. AC / DC power adapter
2. DVD / VCD power supply
3. Air conditioning power supply
4. Induction cooker power
5. LED power supply
6. Set-top box power supply

 

 

DK1203 Datasheet PDF


 

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HS8108 Datasheet – Power Supply Switching Mode Controller IC

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Part Number: HS8108

Function: Power Supply Switching Mode Controller IC

Package: DIP 28 Pin Type

Manufacturer: HuaXin

Image

hs8108-power-supply-controller

Description:

A power supply switching mode controller IC, also known as a power supply controller or SMPS controller, is an integrated circuit designed to control and regulate the operation of a switching mode power supply (SMPS). These ICs are widely used in various power supply applications to achieve efficient power conversion.

The HS8108 is a power supply switching mode controller IC for desktop PCs. It provides all the functions necessary to monitor and control the output of the power supply. Remote ON/OFF control, power good circuitry, some protection features against over-voltage and over-power are implemented.

It directly senses all the output rails for OVP without the need of external dividers. A built-in timer generates accurate timing for control circuit including the PS-off delay. The cycle-by-cycle PWM switching prevents the power transformer from saturation and ensure the fastest response for the short-circuit protection which greatly reduce the stress for power transistors.

Two internal precise 431 shunt regulators provide stable reference voltage and driver for 3.3V and 5V-standby regulation. Utilizing minimum number of external components, the HS8108 includes all of the functions for push-pull and/or half-bridge topology, decreasing the production cost and PCB space,and increasing the MTBF for power supply.

 

Pinout

hs8108-datasheet-pinout

 

Features:

1. PC half-bridge (or 494) power supply supervisor + two 431 + PWM
2. Remote ON/OFF function
3. Power-down warning circuitry ﹠ Power good circuitry
4. Delay time for PSON and PG signal
5. Over-voltage protection for 3.3V, 5V and 12V
6. Under-voltage protection for 3.3V, 5V,12V, -12V and/or -5V
7. Push-pull PWM operation and totem pole outputs
8. Over-power and short-circuit protection
9. Two shunt regulator for 3.3V and 5V Sb
10.  Soft-start and maximum 93% duty cycle

Power supply switching mode controller ICs play a critical role in regulating and controlling the operation of SMPSs, enabling efficient and reliable power conversion in various electronic devices and applications.

HS8108 Datasheet


 

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