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SF6772 Datasheet Preview

SF6772 Datasheet

CV/CC Power Switch

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super-QR/PSRTM CV/CC Power Switch
SF6772
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
SF6772 is a high performance, highly integrated QR
(Quasi Resonant Mode) and Primary Side Regulation
(PSR) power switch for offline small power converter
applications.
SF6772 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.
SF6772 uses Multi Mode Control to improve
efficiency and reliability and to decrease audio noise
energy @ light loadings. SF6772 also integrates the
function of Max. Frequency Clamping @ Output
Short Circuitto limits power MOSFET Vds spike
when output short circuits occurs.
SF6772 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.
SF6772 is available in SOP8 package.
TYPICAL APPLICATION
AC IN
SF6772
1 VDD GND 8
2 FB GND 7
3 CC
4 CS
Drain 6
Drain 5
DC Out
©SiFirst Technology
- 1 - Confidential
SiFirst_DS_6772_V1.0




SiFirst

SF6772 Datasheet Preview

SF6772 Datasheet

CV/CC Power Switch

No Preview Available !

Pin Configuration
VDD
FB
CC
CS
18
SOP8
27
36
45
GND
GND
Drain
Drain
SF6772
Ordering Information
Part Number
Top Mark
SF6772SG
SF6772SG
SF6772SGT
SF6772SG
SOP8
SOP8
Package
Green
Green
Tape & Reel
Yes
Output Power Table(1)
Part Number
SF6772
230VAC ± 15%(2)
Adapter(3)
7.5W
85-265VAC
Adapter(3)
5.5W
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
SF6772SG
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_6772_V1.0


Part Number SF6772
Description CV/CC Power Switch
Maker SiFirst
PDF Download

SF6772 Datasheet PDF






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