DK112 Datasheet – Switching Power Supply Control Chip
Package SOP 8 Pin type
DK112 overview
The DK112 is a Switching Power Supply Control Chip, supplied in an SOP 8 Pin type package. The absolute maximum ratings table on this page lists the 3 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the DK112 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The DK112 is specially design for low power switch mode control, it is widely use in small household electrical appliances.
Datasheet
dk112-datasheet.pdf
DK112 features
- 85V—265V wide range AC power input.
- 65KHz Oscillation Frequency.
- Double chip design with Bipolar Junction Transistor (BJT) to save cost.
- Large scale MOS digital circuit design with E pole BJT driving, so that to enhance its High Voltage Resistance capability.
- Self-power supply design, no need for additional IC to supply the electricity.
- Internal integrated constant high voltage current driving circuit, no need for additional resistance.
- Over current, Over loading, Over temperature, Over voltage, Output short circuit and photo-coupler Failure Protection.
- Internal Ramp Compensation circuit to keep the stability of the circuit in low voltage and high power condition.
- Internal PMW oscillation circuit with Frequency jittering control to keep EMC characteristics.
- Internal Frequency Conversion. Frequency-down in low load condition, comply with the Europe Standard (stand power<0.3W), also reduce the output voltage ripple.
- Ramp current drive circuit included to reduce IC power loss and raise circuit efficiency.
- 4KV Anti-Static ESD test.
DK112 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | Test | Testing pin, suggested to be unloaded.(Prohibited to be connected to other circuits) |
| 2 | GND | Ground reference |
| 3 | Fb | Feedback control pin |
| 4 | Vcc | Power supply of the control circuits |
| 5,6,7,8 | Collector | Output pin. Connected with internal high voltage Collector point and switch mode transformer. |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply voltage | Vcc | -0.3V--9 | V |
| Current of supply voltage | Ivcc | 100 | mA |
| Pin voltage | Vpin | -0.3--Vcc+0.3 | V |
DK112 applications
- Battery charger
- Power AC/DC adapters
- STB power supply
- Electromagnetic oven power supply
- DVD/VCD power supply
- Air conditioner power supply
- AC/DC LED driver applications
- TV/Monitor power supply
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