SF6772V
super-QR/PSR
TM
CV/CC Power Switch
FEATURES
◆
Meet EPS Level 6
◆
Built-in 650V Power MOSFET
◆
Proprietary
super-QR/PSR
TM
(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
GENERAL DESCRIPTION
SF6772V is a high performance, highly integrated QR
(Quasi Resonant Mode) and Primary Side Regulation
(PSR) power switch for offline small power converter
applications.
SF6772V 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.
SF6772V uses
Multi Mode Control
to improve
efficiency and reliability and to decrease audio noise
energy @ light loadings. SF6772V also integrates the
function of “Max.
Frequency Clamping @ Output
Short Circuit”
to limits power MOSFET Vds spike
when output short circuits occurs.
SF6772V 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.
SF6772V 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
DC Out
AC IN
SF6772V
1 VDD
2 FB
3 CC
4 CS
Drain 6
Drain 5
GND 7
©SiFirst Technology
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Confidential
SiFirst_DS_6772V_V1.0
SF6772V
Pin Configuration
VDD
FB
CC
CS
1
2
3
4
SOP7
7
GND
6
5
Drain
Drain
Ordering Information
Part Number
SF6772VTG
SF6772VTGT
Top Mark
SF6772VTG
SF6772VTG
SOP7
SOP7
Package
Green
Green
Tape & Reel
Yes
Output Power Table
(1)
Part Number
SF6772V
230VAC
±
15%
(2)
Adapter
(3)
13W
85-265VAC
Adapter
(3)
10W
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
SF 6772V TG
Y WW
YWW: Year&Week code
©SiFirst Technology
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Confidential
SiFirst_DS_6772V_V1.0
SF6772V
Block Diagram
Cable Drop Compensation
UVLO
FB
2
Sample &
Hold
2V
EA
Constant Voltage (CV)
Regulation
35V
VDD
1
Compensation
Network
Drain
5/6
DEM
super-QR/PSR
&
Logic
TM
S
Q
R
Soft Gate
Driver
CS
LEB
4
1V
CS
Constant Current (CC)
Regulation
Soft Start
3
CC
7
GND
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
©SiFirst Technology
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SiFirst_DS_6772V_V1.0
SF6772V
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)
θ½a
Ψ½t
Value
35
10
-0.3 to 650
-0.3 to 7
-0.7 to 7
150
34
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
o
C
Hz
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
-4-
Confidential
SiFirst_DS_6772V_V1.0
SF6772V
ELECTRICAL CHARACTERISTICS
(T
A
= 25
O
C, VDD=16V, if not otherwise noted)
Symbol
Parameter
Supply Voltage (VDD) Section
I_Startup
I_VDD_Op
UVLO(OFF)
UVLO(ON)
VDD_OVP
V
DD
_Clamp
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
T_blanking
T
D
_OC
V_CS_max
V_CC_ref
VDD Start up Current
Operation Current
VDD Under Voltage Lockout Exit
(Startup)
VDD Under Voltage Lockout Enter
VDD Over Voltage Protection
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
V
FB
=1V, VDD=20V
Min
Typ
2
1
Max
20
1.5
16.5
10.5
35
37
2.03
Unit
uA
mA
V
V
V
V
V
V
V
KHz
mV
uSec
mSec
uA
nSec
nSec
V
14
8.5
31
33
1.97
15.5
9.5
33
35
2.0
2.4
0.65
40
75
I(V
DD
) = 7 mA
Feedback Input Section(FB Pin)
(Note 3)
(Note 3)
2
3
40
500
100
1
490
500
510
Current Sense Input Section (CS Pin)
Constant Current Section (CC Pin)
mV
Power MOSFET Section
BVdss
Rdson
Idss
650
I(Drain)=2A
3.8
1
V
Ω
uA
Zero Gate Voltage Drain Current
Note 3.
Guaranteed by design.
©SiFirst Technology
-5-
Confidential
SiFirst_DS_6772V_V1.0
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