FAN6862_10 Datasheet, PDF (3/16 Pages) Fairchild Semiconductor – Highly Integrated Green-Mode PWM Controller

Marking Information
Pin Configuration
ABx:
TT:
yyyy:
_ _ _:
ABD: FAN6862TY
Wafer Lot Code
Year Code
Week Code
Figure 3. Top Mark
F – Fairchild Logo
Z – Plant Code
X – 1-Digit Year Code
Y – 1-Digit Week Code
TT – 2-Digit Die Run Code
T – Package Type (N:DIP)
P – Y: Green Package
M – Manufacture Flow Code
Figure 4. SSOT-6
Figure 5. DIP-8
Pin Definitions
Pin # DIP8
8
Pin #
SSOT-6
1
7
2
6
5
3
4
4
3
2
5
1
6
Name
Description
GND
FB
NC
RT
SENSE
NC
VDD
GATE
Ground.
Feedback. The FB pin provides the output voltage regulation signal. It
provides feedback to the internal PWM comparator, so that the PWM
comparator can control the duty cycle. This pin also provide for OLP: if VFB is
larger than the trigger level and delays for a long time, the controller stops
and restarts.
No Connect Pin
Temperature Detection. An external NTC thermistor is connected from this
pin to GND for over-temperature protection. The impedance of the NTC
decreases at high temperatures. Once the voltage of the RT pin drops below
a threshold,
PWM output is disabled.
Current Sense. This pin senses the voltage across a resistor. When the
voltage reaches the internal threshold, PWM output is disabled. This activates
over-current protection. This pin also provides current amplitude information
for current-mode control.
No Connect Pin
Power Supply.
Driver Output. The totem-pole output driver for driving the power MOSFET.
© 2009 Fairchild Semiconductor Corporation
FAN6862 • Rev. 1.0.2
3
www.fairchildsemi.com