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SF6072 Datasheet Preview

SF6072 Datasheet

CV/CC Power Switch

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SF6072
NC-Cap/PSRTM (Primary Side Regulation) CV/CC Power Switch
FEATURES
Built-in 700V Power BJT
Proprietary NC-Cap/PSRTM (Primary Side
Regulation) Control without External
Compensation/Filtering Capacitor Needed
30KHz Max. Frequency Clamping @ Output
Short Circuit
◆ ± 5% Constant Current (CC) and Constant
Voltage (CV) Regulation at Universal AC Input
Proprietary
Cable
Voltage
Drop
Compensation in CV Mode
Low Standby Power Under 70mW
Wide VDD Operating Range (7V to 31V)
Compensate for Transformer Inductance
Tolerances and Line Voltage Variation
Pin Floating Protection
Cycle-by-Cycle Current Limiting
Built-in Leading Edge Blanking (LEB)
Built-in 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
Small power adapter
AC/DC LED lighting
GENERAL DESCRIPTION
SF6072 is a high precision, highly integrated DCM
(Discontinuous Conduction Mode) Primary Side
Regulation (PSR) power switch for offline small
power converter applications. It can directly drive
power BJT, which can further lower system cost.
SF6072 uses Multi Mode Control to improve
efficiency and reliability and to decrease audio noise
energy @ light loadings. Around the full load, the
system operates in PWM+PFM mode, which improve
the system reliability. Under light load conditions, the
IC operates in PFM mode to achieve excellent
regulation and high efficiency, and to achieve less
than 70mW standby power. SF6072 also integrates
the function of “Max. Frequency Clamping @
Output Short Circuit” to limits power BJT Vce spike
when output short circuits occurs.
SF6072 has built-in proprietary NC-Cap/PSRTM
control for CV control, which eliminates external
compensation or filtering capacitor. It has built-in
cable drop compensation function, which can provide
excellent CV performance.
SF6072 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), Pin Floating Protection, VDD
Clamping.
SF6072 is available in SOIC-7 package.
TYPICAL APPLICATION
AC IN
SF6072
1 NC GND 7
2 FB
3 VDD
4 CS
C6
C5
DC Out
©SiFirst Technology
- 1 - Confidential
SiFirst_DS_6072_V1.0




SiFirst

SF6072 Datasheet Preview

SF6072 Datasheet

CV/CC Power Switch

No Preview Available !

Pin Configuration
SF6072
Ordering Information
Part Number
Top Mark
SF6072TG
SF6072TG
SF6072TGT
SF6072TGT
Package
SOIC-7
SOIC-7
Green
Green
Tape & Reel
Yes
Output Power Table(1)
Part Number
SF6072
230VAC ± 15%(2)
Adapter(3)
6.5W
85-265VAC
Adapter(3)
4.5W
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
YWW: Year&Week code
Pin Num
1
2
3
4
5-6
7
Pin Description
Pin Name I/O Description
NC - No connect.
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.
VDD
P IC power supply pin.
CS I Current sense pin.
C P High voltage power BJT collector pin.
GND
P Ground
©SiFirst Technology
- 2 - Confidential
SiFirst_DS_6072_V1.0


Part Number SF6072
Description CV/CC Power Switch
Maker SiFirst
PDF Download

SF6072 Datasheet PDF






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