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SY5810

Silergy
Part Number SY5810
Manufacturer Silergy
Description Single Stage Flyback And PFC Controller
Published Mar 20, 2016
Detailed Description Applications Note: SY5810 Single Stage Flyback And PFC Controller With Primary Side Control For LED Lighting Preliminary...
Datasheet PDF File SY5810 PDF File

SY5810
SY5810

Overview
Applications Note: SY5810 Single Stage Flyback And PFC Controller With Primary Side Control For LED Lighting Preliminary datasheet General Description The SY5810 is a single stage Flyback and PFC controller targeting at LED lighting applications.
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 SY5810 □(□□)□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number Package type Note SY5810ABC SOT23-6 ---- Features • Primary side control eliminates 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.
• Internal high current MOSFET driver: 0.
25A sourcing and 0.
5A sinking • Low start up current: 15µA typical • Reliable short LED and Open LED protection • Power factor >0.
90 with single-stage conversion.
• Compact package: SOT23-6 Applications • LED lighting • Down light • Tube lamp • PAR lamp • Bulb Typical Applications Figure 1.
Schematic Diagram SOT23-6 AN_SY5810 Rev0.
1A Silergy Corp.
Confidential- Prepared for Customer Use Only 1 SY5810 Pinout (top view) ISEN 1 6 DRV GND 2 5 VIN COMP 3 4 ZCS (SOT23-6) Top Mark: GZxyz for SY5810ABC(device code: GZ, x=year code, y=week code, z= lot number code) Pin Name SOT23-6 ISEN 1 GND COMP 2 3 ZCS 4 VIN DRV 5 6 Pin Description Current sense pin.
Connect this pin to the source of the primary switch.
Connect the sense resistor across the source of the primary switch and the GND pin.
(current sense resister RS: R S V = k REF I ⋅ NPS ,k = 0.
167 ) OUT Ground pin Loop compensation pin.
Connect a RC network across this pin and ground to stabilize the control loop.
I...


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