FAN6756 Просмотр технического описания (PDF) - Fairchild Semiconductor
Номер в каталоге
Компоненты Описание
производитель
FAN6756 Datasheet PDF : 18 Pages
| |||
Marking Information
ZXYTT
6756ML
TPM
Pin Configuration
ZXYTT
6756MR
TPM
Z - Plant Code
X - 1-Digit Year Code
Y - 1-Digit Week Code
TT - 2-Digit Die Run Code
T - Package Type (M=SOP)
P - Y: Green Package
M - Manufacture Flow Code
Figure 3. Top Mark
GND
FB
NC
HV
SOP-8
1
8
2
7
3
6
4
5
GATE
VDD
SENSE
RT
Figure 4. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name Description
GND Ground. Placing a 0.1 µF decoupling capacitor between VDD and GND is recommended.
Feedback. The output voltage feedback information from the external compensation circuit is fed
FB into this pin. The PWM duty cycle is determined by comparing the FB signal with the current-
sense signal from the SENSE pin.
NC No Connection
High-Voltage Startup. The HV pin is typically connected to the AC line input through two external
diodes and one resistor (RHV). This pin is used, not only to charge the VDD capacitor during
HV startup, but also to sense the line voltage. The line voltage information is used for brownout
protection and power-limit line compensation. This pin also is used to intelligently discharge the
EMI filter capacitor when removal of the AC line voltage is detected.
Over-Temperature Protection. An external NTC thermistor is connected from this pin to GND.
Once the voltage of the RT pin drops below the threshold voltage, the controller latches off the
RT PWM. The RT pin also provides external latch protection. If the RT pin is not connected to the
NTC resistor for over-temperature protection, it is recommended to place a 100 kΩ resistor to
ground to prevent noise interference.
SENSE
Current Sense. The sensed voltage is used for Peak-Current-Mode control, short-circuit
protection, and cycle-by-cycle current limiting.
VDD
Power Supply of IC. Typically a hold-up capacitor connects from this pin to ground. A rectifier
diode, in series with the transformer auxiliary winding, connects to this pin to supply bias during
normal operation.
GATE
Gate Drive Output. The totem-pole output driver for the power MOSFET; internally limited to
VGATE-CLAMP.
© 2011 Fairchild Semiconductor Corporation
FAN6756 • Rev. 2.0.0
3
www.fairchildsemi.com
Share Link: 