NCP3065 Ver la hoja de datos (PDF) - ON Semiconductor

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componentes Descripción

Fabricante

NCP3065

Up to 1.5 A Constant Current Switching Regulator for LEDs

ON Semiconductor 

NCP3065, NCV3065

Switch Collector

Switch Emitter

Timing Capacitor

GND

1

8

2

7

3

6

4

5

(Top View)

N.C.

Ipk Sense

VCC

Comparator

Inverting

Input

Figure 2. Pin Connections

Switch Collector

ÇÇ Switch Emitter

ÇÇ Timing Capacitor

ÇÇÇÇ GND

EP Flag

N.C.

ÇÇIpk Sense

ÇVCC

ÇComparator

Inverting

(Top View)

Input

NOTE: EP Flag must be tied to GND Pin 4 on PCB

Figure 3. Pin Connections

8

N.C.

7

Ipk Sense

6

+VCC

5

Comparator Inverting Input

NCP3065

TSD

SET dominant

R

Q

S

COMPARATOR

-

+

0.2 V

S

Q

R SET dominant

OSCILLATOR

CT

COMPARATOR

+

-

0.235 V

REFERENCE

REGULATOR

1

Switch Collector

2

Switch Emitter

3

Timing Capacitor

4

GND

Figure 4. Block Diagram

PIN DESCRIPTION

Pin No.

Pin Name

1

Switch Collector

2

Switch Emitter

3

Timing Capacitor

4

GND

5

Comparator

Inverting Input

6

VCC

7

Ipk Sense

8

N.C.

Description

Internal Darlington switch collector

Internal Darlington switch emitter

Timing Capacitor Oscillator Input, Timing Capacitor

Ground pin for all internal circuits

Inverting input pin of internal comparator

Voltage supply

Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak

current through the circuit

Pin not connected

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