SF6773V
super-QR/PSR
TM
CV/CC Power Switch
FEATURES
◆
Meet EPS Level 6
◆
Built-in 650V Power MOSFET
super-QR/PSR
TM
(Quasi-
◆
Proprietary
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
GENERAL DESCRIPTION
SF6773V is a high performance, highly integrated QR
(Quasi Resonant Mode) and Primary Side Regulation
(PSR) power switch for offline small power converter
applications.
SF6773V has proprietary
super-QR/PSR
TM
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.
SF6773V uses
Multi Mode Control
to improve
efficiency and reliability and to decrease audio noise
energy @ light loadings. SF6773V also integrates the
function of “Max.
Frequency Clamping @ Output
Short Circuit”
to limits power MOSFET Vds spike
when output short circuits occurs.
SF6773V 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.
SF6773V is available in SOP7 package.
APPLICATIONS
◆
Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, etc
◆
Replaces linear transformer and RCC SMPS
◆
AC/DC LED lighting
TYPICAL APPLICATION
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SiFirst_DS_6773V_V1.2
SF6773V
Pin Configuration
Ordering Information
Part Number
SF6773VTG
SF6773VTGT
Top Mark
SF6773VTG
SF6773VTG
SOP7
SOP7
Package
Green
Green
Tape & Reel
Yes
Output Power Table
(1)
Part Number
SF6773V
230VAC
±
15%
(2)
Adapter
(3)
17W
85-265VAC
Adapter
(3)
13W
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
o
C ambient.
Marking Information
YWW: Year&Week code
Pin Description
Pin Num
1
2
Pin Name
VDD
FB
I/O
P
I
Description
IC power supply pin.
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.
Connect a capacitor between this pin and GND for CC regulation.
Current sense pin.
High voltage power MOSFET drain connection.
Ground
3
4
5-6
7
CC
CS
Drain
GND
O
I
P
P
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SiFirst_DS_6773V_V1.2
SF6773V
Block Diagram
Absolute Maximum Ratings
(Note 1)
Parameter
VDD DC Supply Voltage
VDD DC Clamp Current
Drain pin
CC, CS voltage range
FB voltage range
Package Thermal Resistance (SOP-7)
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10sec.)
ESD Capability, HBM (Human Body Model)
ESD Capability, MM (Machine Model)
Value
35
10
-0.3 to 650
-0.3 to 7
-0.7 to 7
150
150
-40 to 85
-65 to 150
260
3
250
Unit
V
mA
V
V
V
o
C/W
o
C
o
C
o
C
o
C
kV
V
Recommended Operation Conditions
(Note 2)
Parameter
Supply Voltage, VDD
Operating Ambient Temperature
Maximum Switching Frequency
Value
10 to 30
-40 to 85
120K
Unit
V
C
Hz
o
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SiFirst_DS_6773V_V1.2
SF6773V
ELECTRICAL CHARACTERISTICS
(T
A
= 25
O
C, VDD=22V, if not otherwise noted)
Symbol
Parameter
Supply Voltage (VDD) Section
I_Startup
I_VDD_Op
UVLO(ON)
UVLO(OFF)
VDD_OVP
V
DD
_Clamp
VDD Start up Current
Operation Current
VDD Under Voltage
Lockout Exit (Startup)
VDD Under Voltage
Lockout Enter
VDD Over Voltage
Protection trigger
VDD Zener Clamp
Voltage
Internal Error
Amplifier(EA)
reference input
Output over voltage
protection threshold
Output Short Circuit
Threshold
Output Short Circuit
Frequency Clamp
Demagnetization
comparator threshold
Minimum OFF time
Maximum OFF time
Max Cable
compensation current
CS Input Leading
Edge Blanking Time
Over Current
Detection and Control
Delay
Max CS pin voltage
Internal CC reference
Power MOSFET
Drain Source
Breakdown Voltage
Static Drain-Source On
Resistance
Test Conditions
VDD =UVLO(ON)-1V,
Measure current into VDD
V
FB
=1V, VDD=22V
Min
Typ
2
1
20.5
9.5
33
35
Max
20
1.5
22
10.5
35
37
Unit
uA
mA
V
V
V
V
19
8.5
31
I(V
DD
) = 7 mA
33
Feedback Input Section(FB Pin)
V
FB
_EA_Ref
V
FB
_OVP
V
FB
_Short
F
Clamp
_Short
V
FB
_DEM
T
min
_OFF
T
max
_OFF
I
Cable
_max
1.97
2.0
2.03
V
2.4
0.65
40
75
2
3
40
V
V
KHz
mV
uSec
mSec
uA
Current Sense Input Section (CS Pin)
T_blanking
T
D
_OC
500
100
nSec
nSec
V_CS_max
V_CC_ref
BVdss
1
490
650
500
510
V
mV
V
Constant Current Section (CC Pin)
Power MOSFET Section
(7)
Rdson
Idss
I(Drain)=2A
2.6
3
1
Ω
uA
Zero Gate Voltage
Drain Current
Note 1.
Stresses beyond those listed under
“Absolute
Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other
conditions beyond those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 2.
The device is not guaranteed to function outside its operating conditions.
©SiFirst Technology
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SiFirst_DS_6773V_V1.2
Microcontroller MCU
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