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SF6021 Datasheet Preview

SF6021 Datasheet

highly integrated DCM Primary Side Regulation power switch

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FEATURES
Built-in 700V Power BJT
Proprietary NC-Cap/PSR-IITM Control:
±4% CC and CV Precision
Proprietary “Audio Noise Cancellation”
Control
Built-in “Fast Dynamic Response” Control to
Meet USB Charge Requirements
Proprietary “Zero-Output Startup” Control
Proprietary “Smart Output Short Protection”
without External Compensation/Filtering
Capacitor Needed
Max. 50V Output for AC/DC LED Lighting
Direct Drive of Low Cost BJT
Proprietary Cable Drop Compensation
Multi Mode Control
Wide VDD Operating Range
11.7V UVLO Hysteresis Window
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Built-in Soft Start, Pin Floating Protection
VDD UVLO, OVP & Clamp
APPLICATIONS
Battery chargers
Replaces linear transformer and RCC SMPS
Small power adapter
AC/DC LED lighting
GENERAL DESCRIPTION
SF6021 is a high precision, highly integrated DCM
(Discontinuous Conduction Mode) Primary Side
Regulation (PSR) power switch for offline small
power converter applications. It has built-in power
BJT, which can further lower system cost.
SF6021 has built-in proprietary NC-Cap/PSR-IITM
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. The IC uses Multi Mode
Control to improve efficiency and reliability and to
decrease audio noise energy @ light loadings.
SF6021 integrates proprietary “Audio Noise
Cancellation” control for audio noise free operation.
The IC has built-in “Fast Dynamic Response
control to meet USB Charge requirements. SF6021
also integrates proprietary “Zero-Output Startup
control to achieve startup when output is near zero
voltage. The IC has proprietary “Smart Output Short
Protection”, which can protect the system with large
leakage inductance when output is short circuit.
SF6021 integrates functions and protections of FB
Short Protection, Under Voltage Lockout (UVLO),
VDD Over Voltage Protection (VDD OVP), Soft Start,
Cycle-by-cycle Current Limiting (OCP), Pin Floating
Protection, VDD Clamping.
SF6021 is available SOP7 packages.
TYPICAL APPLICATION
AC IN
SF6021
1 VDD
2 FB
GND 7
3 NC
4 CS
C6
C5
DC
Out
Pin Configuration
©SiFirst Technology
- 1 - Confidential
SiFirst_DS_6021_V1.0




SiFirst

SF6021 Datasheet Preview

SF6021 Datasheet

highly integrated DCM Primary Side Regulation power switch

No Preview Available !

VDD
FB
NC
CS
17
2
SOP7
36
45
GND
C
C
Ordering Information
Part Number
Top Mark
SF6021TG
SF6021TG
SF6021TGT
SF6021TG
Marking Information
SOP7
SOP7
Package
Green
Green
Tape & Reel
Yes
SF 6 0 2 1 T G
Y WW
YWW: Year&Week code
Pin Description
Pin Num
1
2
3
4
5-6
7
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.
NC - No connect.
CS I Current sense pin.
C P High voltage power BJT collector pin.
GND
P Ground
©SiFirst Technology
- 2 - Confidential
SiFirst_DS_6021_V1.0


Part Number SF6021
Description highly integrated DCM Primary Side Regulation power switch
Maker SiFirst
PDF Download

SF6021 Datasheet PDF






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