NCL30082 datasheet(2/32 Pages) ONSEMI

Part #	NCL30082

Description	Dimmable Quasi-Resonant Primary Side Current-ModeController for LED Lighting with Thermal Fold-back

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Manufacturer	ONSEMI [ON Semiconductor]

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NCL30082

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2

1

2

3

45

8

6

7

.

Aux

.

Figure 1. Typical Application Schematic for NCL30082

VDIM

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 VDIM(EN) and VDIM100 can be used to vary the current,

or a PWM signal with an amplitude greater than VDIM100.

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