SY58203A1 Datasheet PDF Download, Silergy





(PDF) SY58203A1 Datasheet PDF Download

Part Number SY58203A1
Description Single Stage Flyback And PFC Regulator
Manufacture Silergy
Total Page 19 Pages
PDF Download Download SY58203A1 Datasheet PDF

Features: Applications Note:SY58203A1 Single Stage Flyback And PFC Regulator With Primary Side Control For LED Lighting General Description The SY58203A1 is a single stage Flyback and PFC regulator target ing at LED lighting applications. It in tegrates a 700V MOSFET to decrease phys ical volume. It is a primary side contr oller without applying any secondary fe edback circuit for low cost, and drives the Flyback converter in the quasi-res onant mode to achieve higher efficiency . It keeps the Flyback converter in con stant on time operation to achieve high power factor. Ordering Information S Y58203□(□□)□ Temperature Code Package Code Optional Spec Code Orde ring Number SY58203A1FAC Package type SO8 Note ---- Typical Applications F eatures • Integrated 700V MOSFET • Primary side control eliminate to the opto-coupler. • Valley turn-on of the primary MOSFET to achieve low switchin g losses • 0.3V primary current sense reference voltage leads to a lower sense resistance thus a lower conduction lo.

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Applications Note:SY58203A1
Single Stage Flyback And PFC Regulator
With Primary Side Control For LED Lighting
General Description
The SY58203A1 is a single stage Flyback and PFC
regulator targeting at LED lighting applications. It
integrates a 700V MOSFET to decrease physical volume.
It is a primary side controller without applying any
secondary feedback circuit for low cost, and drives the
Flyback converter in the quasi-resonant mode to achieve
higher efficiency. It keeps the Flyback converter in
constant on time operation to achieve high power factor.
Ordering Information
SY58203(□□)
Temperature Code
Package Code
Optional Spec Code
Ordering Number
SY58203A1FAC
Package type
SO8
Note
----
Typical Applications
Features
Integrated 700V MOSFET
Primary side control eliminate to the opto-coupler.
Valley turn-on of the primary MOSFET to achieve
low switching losses
0.3V primary current sense reference voltage leads to
a lower sense resistance thus a lower conduction loss.
Low start up current: 15µA typical
Reliable short LED and Open LED protection
Power factor >0.90 with single-stage conversion.
Maximum frequency limit: 120kHz
Compact package: SO8
Applications
LED lighting
R commended operating output power
P oducts
90~264Vac 176~264Vac
SY58203A1
10W
17.5W
AC input
90~264V
DB1
D2
R2 C2 NP
NS
C1 R1
T1
R3
D3
NAUX
R6
R9
D1 R5
C5
C7 R7
NC Drain
VIN NC
COMP Source
ZCS GND
SY58203A1
R8
C3
DC Output
Figure 1. Schematic Diagram SO8
Figure 2. Efficiency vs Input Voltage
AN_SY58203A1 Rev. 0.9 Silergy Corp. Confidential-Prepared for Customer Use Only 1

                    
                    






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