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SF6778S Datasheet Preview

SF6778S Datasheet

Power MOSFET

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FEATURES
Meet EPS Level 6
Built-in 600V Power MOSFET
Proprietary super-QR/PSRTM (Quasi-
Resonant & Primary Side Regulation) Control
for High Efficiency and Low EMI
Proprietary Cable Drop Compensation
Max. Frequency Clamping to Limit Power
MOSFET Vds Spike @ Output Short Circuit
Less than 70mW Standby Power
±5% CC and CV Precision
Multi-Mode Control
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Soft Start
Output Over Voltage Protection
VDD UVLO, OVP & Clamp
APPLICATIONS
Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, etc
Replaces linear transformer and RCC SMPS
AC/DC LED lighting
GENERAL DESCRIPTION
SF6778S is a high performance, highly integrated QR
(Quasi Resonant Mode) and Primary Side Regulation
(PSR) power switch for offline small power converter
applications.
SF6778S has proprietary super-QR/PSRTM control
for high efficiency and low EMI, which can ensure
system to meet EPS Level 6 energy standard. The IC
also has built-in cable drop compensation function to
achieve excellent CV performance.
SF6778S uses Multi Mode Control to improve
efficiency and reliability and to decrease audio noise
energy @ light loadings. SF6778S also integrates the
function of “Max. Frequency Clamping @ Output
Short Circuit” to limits power MOSFET Vds spike
when output short circuits occurs.
SF6778S integrates functions and protections of FB
Short Protection, Under Voltage Lockout (UVLO),
VDD Over Voltage Protection (VDD OVP), Output
Over Voltage Protection (Output OVP), Soft Start,
Cycle-by-cycle Current Limiting (OCP), Pin Floating
Protection, VDD Clamping.
SF6778S is available in DIP8 package.
TYPICAL APPLICATION
AC IN
SF6778S
1 VDD GND 8
2 FB GND 7
3 CC
4 CS
Drain 6
Drain 5
DC Out
Pin Configuration
©SiFirst Technology
- 1 - Confidential
SiFirst_DS_6778S_V1.0




SiFirst

SF6778S Datasheet Preview

SF6778S Datasheet

Power MOSFET

No Preview Available !

VDD
FB
CC
CS
18
DIP8
27
36
45
GND
GND
Drain
Drain
Ordering Information
Part Number
Top Mark
SF6778SDP
SF6778SDP
DIP8
Output Power Table(1)
Part Number
SF6778S
230VAC ± 15%(2)
Adapter(3)
18W
Package
RoHs
Tape & Reel
85-265VAC
Adapter(3)
15W
Note 1. The Max. output power is limited by junction temperature
Note 2. 230VAC or 100/115VAC with doublers
Note 3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat
sink at 50 oC ambient.
Marking Information
SF 6778 SDP
Y WW
YWW: Year&Week code
Pin Description
Pin Num
1
2
3
4
5-6
7-8
Pin Name I/O Description
VDD
P IC power supply pin.
FB I System feedback pin. This control input regulates both the output voltage
in CV mode and output current in CC mode based on the flyback voltage
of the auxiliary winding.
CC O Connect a capacitor between this pin and GND for CC regulation.
CS I Current sense pin.
Drain P High voltage power MOSFET drain connection.
GND
P Ground
©SiFirst Technology
- 2 - Confidential
SiFirst_DS_6778S_V1.0


Part Number SF6778S
Description Power MOSFET
Maker SiFirst
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