Datasheet

NCL30082
http://onsemi.com
2
1
2
3
45
8
6
7
.
.
Aux
.
Figure 1. Typical Application Schematic for NCL30082
V
DIM
Table 1. PIN FUNCTION DESCRIPTION
Pin No Pin Name Function Pin Description
1 SD Thermal Fold−back
and shutdown
Connecting an NTC to this pin allows reducing the output current down to 50%
of its fixed value before stopping the controller. A Zener diode can also be
used to pull−up the pin and stop the controller for adjustable OVP protection
2 ZCD Zero Crossing Detection Connected to the auxiliary winding, this pin detects the core reset event.
3 CS Current sense This pin monitors the primary peak current
4 GND − The controller ground
5 DRV Driver output The current capability of the totem pole gate drive (+0.3/−0.5 A) makes it suit-
able to effectively drive a broad range of power MOSFETs.
6 VCC Supplies the controller This pin is connected to an external auxiliary voltage.
7 VIN Input voltage sensing
Brown−Out
This pin observes the HV rail and is used in valley selection. This pin also
monitors and protects for low mains conditions.
8 DIM Analog / PWM dimming This pin is used for analog or PWM dimming control. An analog signal than
can be varied between V
DIM(EN)
and V
DIM100
can be used to vary the current,
or a PWM signal with an amplitude greater than V
DIM100
.