PRIMARY DATASHEET
Features
Datasheet
Current Mode PWM Controller
General Description
SDC4566 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 60W range.
Frequency shuffling technology for improved emc
performance
Audio noise free operation
Extended burst mode control for improved efficiency
and minimum standby power design
Internal synchronized slope compensation
Low VCC startup current and low operating current
Leading edge blanking on current sense input
Good protection coverage with auto self-recovery
(UVLO/OVP/ OCP/OLP/OTP)
The internal slope compensation improves system large
signal stability and reduces the possible subharmonic
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.
FB/CS open loop protection
Secondary Rectifier Short Protection
Package: SOT-23-6
SDC4566 offers complete protection coverage with
automatic self-recovery feature including cycle-by-cycle
current limiting (OCP), over load protection (OLP), VCC
over voltage clamp and under voltage lockout (UVLO). The
gate drive output is clamped to maximum 14V to protect
the power MOSFET.
Applications
Battery charger
Power adapter
Set-top box power supplies
SOT-23-6
Figure 1. Package Type
December, 2013 Rev. 1.1
1/14
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www.sdc-semi.com