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PDF SF5928 Data sheet ( Hoja de datos )
| Número de pieza | SF5928 | |
| Descripción | High Precision Primary Side Regulation (PSR) CV/CC Power Switch | |
| Fabricantes | SiFirst | |
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Hay una vista previa y un enlace de descarga de SF5928 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Softwin swAides
SF5928
High Precision Primary Side Regulation (PSR) CV/CC Power Switch
FEATURES
◆ Built-in 600V Power MOSFET
◆ Low Standby Power Under 30mW, Easily to
Pass Energy Star EPS2.0
◆ Primary Side Regulation (PSR) without TL431
and Opto-Coupler
◆ ± 5% Constant Current (CC) and Constant
Voltage (CV) Regulation at Universal AC Input
◆ Proprietary
Cable
Voltage
Drop
Compensation in CV Mode
◆ Compensate for Line Voltage Variation
◆ Compensate for Transformer Inductance
Tolerances
◆ Built-in Control Loop Compensation in CV
Mode
◆ All Pins Floating Protection
◆ PFM Control Eases EMI Design
◆ Cycle-by-Cycle Current Limiting
◆ Built-in Leading Edge Blanking (LEB)
◆ Built-in Soft Start
◆ Output Over Voltage Protection
◆ VDD OVP & Clamp
◆ VDD Under Voltage Lockout (UVLO)
APPLICATIONS
◆ Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, etc
◆ Replaces linear transformer and RCC SMPS
◆ Small power adapter
◆ AC/DC LED lighting
TYPICAL APPLICATION
GENERAL DESCRIPTION
SF5928 is a high performance, highly integrated
DCM (Discontinuous Conduction Mode) Primary Side
Regulation (PSR) power switch for offline small
power converter applications.
SF5928 uses Pulse Frequency Modulation (PFM)
control to improve efficiency and eases system EMI
design. The IC dramatically lowers system cost by
eliminating the opto-coupler and secondary control
circuits. It also can provide very tight output voltage
regulation (CV), in addition to output current control
(CC) ideal for charging applications.
SF5928 has Error Amplifier (EA) CV with built-in loop
compensation network for CV control, which
eliminates external compensation circuitry. It has
built-in cable drop compensation function, which can
provide excellent CV performance. The IC also has
built-in soft start function to soften the stress on the
MOSFET during power on period. Under light load
conditions, the IC decreases switching frequency to
achieve excellent regulation and high efficiency, yet
meets the requirement for no-load consumption less
than 30mW.
SF5928 integrates functions and protections of Under
Voltage Lockout (UVLO), VDD Over Voltage
Protection (VDD OVP), Output Over Voltage
Protection (Output OVP), Soft Start, Cycle-by-cycle
Current Limiting (OCP), All Pins Floating Protection,
VDD Clamping.
SF5928 is available in DIP8 package.
AC IN
SF5928
1 VDD GND 8
2 NC GND 7
3 FB
4 CS
Drain 6
Drain 5
DC Out
© - 1 - _DS_5928_V1.0
1 page  
Softwin swAides
CHARACTERIZATION PLOTS
SF5928
© - 5 - _DS_5928_V1.0
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SF5928.PDF ] | |
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