SP6876에 대한 고찰

 

 

오늘은 SP6876에 대한 고찰을 해 보겠습니다.

SP6876은 Multi-Mode PWM Controller로 아래와 같은 특성을 지니고 있습니다.

 

 

 

 

 

 

Description.

 

SP6876 is a high-performance flyback multi-mode PWM controller, optimized to achieve high efficiency and low standby power with effective system cost.

 

At full load IC operates in CCM mode with fixed frequency at low line input range and in QR mode at high line input range.

 

At normal load conditions it operates in QR mode with internally limited frequency to 75kHz typ. to minimize switching loss.

 

Controller gradually reduces frequency with loading at light load conditions to keep high efficiency and switches to extended burst mode at no-load conditions to minimize stand-by power loss.

 

As a result, high conversion efficiency can be achieved with universal input range and within whole loading range.

 

 

 

The rich set of protection features such as

 

1. VCC Under Voltage Lockout (UVLO) with hysteresis

2. VCC Over Voltage Protection (VCC OVP) and clamp

3. Cycle-by-cycle current limiting with line voltage compensation

4. Overload Protection (OLP) with auto-recovery

5. Adjustable load Over Voltage Protection (OVP)

6. Fixed on-chip and adjustable external over temperature protection (OTP) with auto-recovery and helps to build low component counts and high-performance power supply.

 

 

The tone energy at below 23KHz is minimized in the design and audio noise is eliminated during operation.

SP6876 is offered in space saving SOT23-6 package.

 

 

Features.

 

Internal soft start reducing MOS FET VDS stress..

Multi-mode operation for better efficiency.

Frequency shuffling for better EMI.

Extended burst mode for lower standby power loss.

 

 

 

Applications.

 

AC/DC switching power adaptor.

Set-top box power supply.

Open frame switching power supply.

NB Adaptor.

TV/Monitor Standby Power.

PC Peripherals.

 

 

 

아래 사진은  SP6876+SP6026_48 Watts Demo Board입니다.

 

SP6876+SP6026_48W-Top

 

 

SP6876+SP6026_48W-Bottom

 

 

 

 

 

 

아래와 같은 Application 파일이 있습니다, Down 받아서 보셔도 됩니다.

 

 

SP6876+SP6033H or SP6026_48W test report.pdf

1.67MB

SP6876+SP689+SP6026_45W Circuit.pdf

0.12MB

 

 

 

 

아래와 같은 Spec sheet 파일이 있습니다, Down 받아서 보셔도 됩니다.

 

 

SP6876.pdf

0.64MB