Quasi-Resonant PWM Controller
SP6878
Quasi-Resonant PWM Controller
DESCRIPTION
The SP6878 is a low cost, quasi-resonant flyback controller where the ...
Description
SP6878
Quasi-Resonant PWM Controller
DESCRIPTION
The SP6878 is a low cost, quasi-resonant flyback controller where the maximum frequency is below 100KHz. The internal valley detector ensures the converter operates at quasi-resonant operation over wide range of line voltage. The build-in advanced energy saving function would provide the users a superior AC/DC power application of higher efficiency, low external component counts, and lower cost solution for applications. The SP6878 features more protections or functions for the following characteristics: over voltage protection (OVP); over temperature protection
(OTP); over load protection (OLP).
SP6878 is available by SOP-8/ DIP-8P packages.
APPLICATIONS AC/DC Switching Power Adaptor Set-top Box Power Supply Open-Frame Switching Power Supply
FEATURES
High-Voltage BCD Process Under Voltage Lockout (UVLO ) Quasi-Resonant Control Internal 4ms Soft Start Over Temperature Latch Shutdown OLP (Over Load Protection) OVP (Over Voltage Protection) on Vcc Pin 100KHz Maximum Frequency 800mA Driving Capability
PIN CONFIGURATION SOP-8
PART MARKING
SOP-8
2020/07/07 Ver 4
Page 1
SP6878
Quasi-Resonant PWM Controller
TYPICAL APPLCATION CIRCUIT FOR HIGH EFFICIENCY SMPS
PIN DESCRIPTION
Pin Symbol
Description
1
FR Set the internal frequency and timer.
2
FB
Voltage feedback. It provides feedback to the internal PWM comparator to control the duty cycle.
3
CS Current sense.
4
GND Ground
5 GATE Gate driver...
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