NCP1215 Просмотр технического описания (PDF) - ON Semiconductor

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NCP1215

Low Cost Variable OFF Time Switched Mode Power Supply Controller

ON Semiconductor 

NCP1215

Line

+

+

FB NC

CT NC

CS Vcc

GND Gate *

N

+

+

−

* If your application requires a gate−source resistor, please refer to design guidelines in this document.

Figure 1. Typical Application

FB

Feedback Loop

Control

−

VDD

Reference

Iref Regulator

+

VCC

− 12/8.5 V

Voffset

Off−Time

+

Comparator

CT

0−7 V

−

+

Undervoltage

Lockout

10 mA

Set

CS

12.5−50 mA

GND

Current Sense Comparator

+

Reset

−

Gate Driver

Q

Gate

Q

Figure 2. Representative Block Diagram

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