SG6932DZ Fairchild Semiconductor, SG6932DZ Datasheet - Page 5

• Manufacturer Part Number: SG6932DZ
• Description: IC PFC CONTROLLER CCM 16DIP
• Manufacturer: Fairchild Semiconductor

Specifications of SG6932DZ

• Mode: Continuous Conduction (CCM)
• Frequency - Switching: 65kHz
• Current - Startup: 10µA
• Voltage - Supply: 14 V ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2007 Fairchild Semiconductor Corporation
SG6932 • Rev. 1.1.3
Pin Definitions
Pin #
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
FBPWM
ISENSE
OPWM
FBPFC
Name
VRMS
IPWM
OPFC
IPFC
GND
VDD
VEA
IMP
IEA
IAC
SS
RI
Description
Line-Voltage Detection. The pin is used for PFC multiplier and brownout protection.
Oscillator Setting. One resistor connected between RI and ground determines the switching
frequency. A resistor with resistance between 12 ~ 47kΩ is recommended. The switching
frequency is equal to [1560 / R
switching frequency is 65kHz.
Output of PFC Current Amplifier. The signal from this pin is compared with an internal
sawtooth to determine the pulsewidth for PFC gate drive.
Inverting Input of PFC Current Amplifier. Proper external compensation circuits result in
excellent input power factor via average-current-mode control.
Non-inverting Input of PFC Current Amplifier and Output of Multiplier. Proper external
compensation circuits result in excellent input power factor via average-current-mode control.
Peak Current Limit Setting for PFC.
PWM Feedback Input. The control input for voltage-loop feedback of PWM stage. It is
internally pulled HIGH through a 6.5kΩ resistor. An external opto-coupler from the secondary
feedback circuit is usually connected to this pin.
PWM Current Sense. The current sense input for the PWM stage. Via a current sense
resistor, this pin provides the control input for peak-current-mode control and cycle-by-cycle
current limiting.
PWM Gate Drive. The totem-pole output drive for PWM MOSFET. This pin is internally
clamped under 18V to protect the MOSFET.
Ground. The power ground.
PFC Gate Drive. The totem-pole output drive for the PFC MOSFET. This pin is internally
clamped under 18V to protect the MOSFET.
Supply. The power supply pin. The threshold voltages for start-up and turn-off are 14V and
10V, respectively. The operating current is lower than 10mA.
PWM Soft-Start. During startup, the SS pin charges an external capacitor with a 50µA
constant current source. The voltage on FBPWM is clamped by SS during startup. In the event
of a protection condition occurring and/or PWM being disabled, the SS pin is quickly
discharged. The voltage of SS pin can be used to select 50% or 65% maximum duty cycle.
Voltage Feedback Input for PFC. The feedback input for PFC voltage loop. The inverting
input of PFC error amplifier. This pin is connected to the PFC output through a divider network.
Error Amplifier Output for PFC Voltage Feedback Loop. A compensation network (usually a
capacitor) is connected between this pin and ground. A large capacitor value results in a
narrow bandwidth and improves the power factor.
Input AC Current. For normal operation, this input is used to provide current reference for the
multiplier. The suggested maximum I
I
]kHz, where R
5
AC
is 360µA.
I
is in kΩ. For example, if R
I
is 24kΩ, the
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