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SF6761S Datasheet Preview

SF6761S Datasheet

CV/CC Controller

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super-QR/PSRTM CV/CC Controller
SF6761S
FEATURES
Easily Meet EPS Level 6
Less than 75mW Standby Power
Proprietary super-QR/PSRTM (Quasi-
Resonant & Primary Side Regulation) Control
for High Efficiency and Low EMI
±5% CC and CV Precision
Proprietary Cable Drop Compensation
Smart Output Short Protection
Cycle-by-Cycle Current Limiting
Built-in Leading Edge Blanking (LEB)
Pin Floating Protection
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
AC/DC LED lighting
GENERAL DESCRIPTION
SF6761S is a high performance, highly integrated QR
(Quasi Resonant Mode) and Primary Side Regulation
(PSR) controller for offline small power converter
applications.
SF6761S has proprietary super-QR/PSRTM control
for high efficiency and low EMI. The standby power is
less than 75mW @230VAC. Thus, the IC can meet
EPS Level 6 energy standard easily. The IC also has
built-in cable drop compensation function, which can
provide excellent CV performance.
SF6761S integrates functions and protections of
Under Voltage Lockout (UVLO), VDD Over Voltage
Protection (VDD OVP), Soft Start, Cycle-by-cycle
Current Limiting (OCP), Pin Floating Protection, Gate
Clamping, VDD Clamping.
SF6761S is available in SOT23-6 package.
TYPICAL APPLICATION
AC IN
VDD FB GATE
SF6761S
CC CS
GND
©SiFirst Technology
-1-
Confidential
SiFirst_DS_6761S_V1.0




SiFirst

SF6761S Datasheet Preview

SF6761S Datasheet

CV/CC Controller

No Preview Available !

Pin Configuration
SF6761S
GATE
GND
VDD
16
SOT23-6
25
34
FB
CC
CS
Ordering Information
Part Number
Top Mark
SF6761SLGT
61SYW
Marking Information
Package
SOT23-6
Green
Tape & Reel
Yes
61SYW
Dot: Pin1 Mark
61S:Part number SF6761S
YW: Year&Week Code
Pin Description
Pin Num
1
2
3
4
5
6
Pin Name I/O Description
GATE O Totem-pole gate driver output to drive the external MOSFET.
GND
P Ground
VDD
P IC power supply pin.
CS I Current sense pin.
CC O Connect a capacitor between this pin and GND for CC regulation.
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.
©SiFirst Technology
- 2 - Confidential
SiFirst_DS_6761S_V1.0


Part Number SF6761S
Description CV/CC Controller
Maker SiFirst
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SF6761S Datasheet PDF






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