SG6961SZ SOP8 PFC CONTROLLER


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SG6961SZ SOP8 PFC CONTROLLER

Product no.: IC47-CP285

In stock
can be shipped within 2 days

£6.50
Price before VAT, plus Delivery


FEATURES
 
Boundary Mode PFC Controller
 
Low Input Current THD
 
Controlled On-Time PWM
 
Zero-Current Detection
 
Cycle-by-Cycle Current Limiting
 
Leading-Edge Blanking Instead of RC Filtering
 
Low Start-up Current (10μA Typical)
 
Low Operating Current (4.5mA Typical)
 
Feedback Open-Loop Protection
 
Programmable Maximum On-Time (MOT)
 
Output Over-Voltage Clamping Protection
 
Clamped Gate Output Voltage 16.5V
 
PIN DESCRIPTIONS
Pin No. Symbol Description
1 INV
Inverting input of the error amplifier. INV is connected to the converter output via a resistive divider. This pin
is also used for over-voltage clamping and open-loop feedback protection.
2 COMP
The output of the error amplifier. To create a precise clamping protection, a compensation network between
this pin and GND is suggested.
3 MOT
A resistor from MOT to GND is used to determine the maximum on-time of the external power MOSFET. The
maximum output power of the converter is a function of the maximum on-time.
4 CS
Input to the over-current protection comparator. When the sensed voltage across the sense resistor reaches
the internal threshold (0.82V), the switch is turned off to activate cycle-by-cycle current limiting.
5 ZCD
Zero Current Detection. This pin is connected to an auxiliary winding via a resistor to detect the zero crossing
of the switch current. When the zero crossing is detected, a new switching cycle is started. If it is connected
to GND, the device is disabled.
6 GND
The power ground and signal ground. Placing a 0.1μF decoupling capacitor between the VCC
 
and GND pins
is recommended.
7 GD Totem-pole driver output to drive the external power MOSFET. The clamped gate output voltage is 16.5V.
8 VCC Driver and control circuit supply voltage
 
Power Factor Controller
SG6961
 
 
© System General Corp. - 4 - www.sg.com.tw • www.fairchildsemi.com
Version 1.3.1 (IRO33.0028.B6) September 24, 2007
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
DD
DC Supply Voltage* 25 V
V
HIGH
GD
-0.3 to 25.0 V
V
LOW
Others (INV, COMP, MOT, CS,) -0.3 to 7.0 V
V
zcd
Input Voltage to ZCD Pin -0.3 to 12.0 V
DIP-8 800
P
D
Power Dissipation
SOP-8 400
mW
DIP-8 48.45
R
θ
J-A
 
Thermal Resistance (Junction-to-Air)
SOP-8 62.70
°
C/W
T
J
Operating Junction Temperature -40 to + 150
°
C
T
STG
Storage Temperature Range -65 to + 150
°
C
T
L
Lead Temperature (Wave Soldering or Infrared, 10 Seconds)
 
260 °C
Electrostatic Discharge Capability, Human Body Model 2.0 kV
ESD
Electrostatic Discharge Capability, Machine Model 200 V
* All voltage values, except differential voltages, are given with respect to GND pin.
* Stresses beyond those listed under "absolute maximum
ratings" may cause permanent damage to the device
Browse these categories as well: SEMICONDUCTORS, IC - PFC
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