FS6830 Schematic ( PDF Datasheet ) - American First Semiconductor

Teilenummer FS6830
Beschreibung Low Standby Power High Performance PWM Controller
Hersteller American First Semiconductor
Logo American First Semiconductor Logo 

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FS6830 Datasheet, Funktion
Low Standby Power High Performance PWM Controller
General Description
FS6830 is a highly integrated current mode PWM control IC optimized for high performance,
low standby power and cost effective offline flyback converter applications in sub 40W range.
PWM switching frequency at normal operation is externally programmable and trimmed to tight
range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize
switching loss. Lower standby power and higher conversion efficiency is thus achieved.
The internal slope compensation improves system large signal stability and reduces the
possible sub-harmonic oscillation at high PWM duty cycle output. Leading-edge blanking on
current sense(CS) input removes the signal glitch due to snubber circuit diode reverse recovery and
thus greatly reduces the external component count and system cost in the design.
FS6830 offers complete protection coverage with automatic self-recovery feature including
Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and
under voltage lockout (UVLO). The Gate-drive output is clamped to maximum 18V to protect the
power MOSFET. Excellent EMI performance is achieved with frequency shuffling technique
together with soft switching control at the totem pole gate drive output. FS6830 is offered in
SOT23-6 package.
Battery Charger
Power Adaptor for PDA and Digital Camera
Set-Top Box Power Supplies
Open-frame SMPS
Optimized for Sub 40W Applications
Frequency Shuffling for Improved EMI
Extended Burst Mode for Improved Efficiency and Low Standby Power
Audio Noise Free Operation
External Programmable PWM Switching Frequency
Internal Synchronized Slope Compensation
Low VDD Startup Current and Low Operating Current
Leading Edge Blanking on Current Sense Input
Over Load Protection(OLP) and Cycle-by-Cycle Current Limiting Protection(OCP)
VDD Over Voltage Protection(OVP),Under Voltage Lockout Protection(UVLO) and Over
Voltage Clamp
Gate Output Maximum Voltage Clamp (18V)
Pb-free SOT23-6 Package
@ 2010 Copyright By American First Semiconductor
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FS6830 Datasheet, Funktion
Typical Application
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FS6830Low Standby Power High Performance PWM ControllerAmerican First Semiconductor
American First Semiconductor


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