KA7525BD Просмотр технического описания (PDF) - Fairchild Semiconductor

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Компоненты Описание

производитель

KA7525BD

Power Factor Correction Controller

Fairchild Semiconductor 

Internal Block Diagram

KA7525B

Vcc

8

+ 2.1V

_

36V

UVLO

10V

2.5V Ref

Internal

Bias

Timer R

Idet 5

+ 240mV

S

_

7.5V

Zero Current

1.8V

Detector

CS 4

-

R

R,C Filter

+ Current Sense

Comparator Vref

MULT 3

1.24V

Vm1

Vmo

0 ~2V

Multiplier

-+

Vref ~ Vref+1V

Vm2

K

=

Pin4 Threshold(Vmo)

Vm1× (Vm2-Vref)

6

GND

2

EA OUT

Vcc

Drive

Output

7 OUT

Q

Over Voltage

Protection

+

_

1.8V

+

Vref

_

Vea(-)

Error Amp

1 INV

Absolute Maximum Ratings

Parameter

Supply Voltage

Peak Drive Output Current

Driver Output Clamping Diodes

VO > VCC or VO < -0.3V

Detector Clamping Diodes

Error Amp, Multiplier and Comparator Input Voltage

Operating Temperature Range

Storage Temperature Range

Power Dissipation

Thermal Resistance (Junction-to-Air)

Symbol

VCC

Ioh, IoI

Iclamp

Idet

Vin

Topr

Tstg

Pd

Rθja

Value

30

±500

±10

±10

-0.3 to 6

0 to 125

-65 to 150

0.8

100

Temperature Characteristics (0°C ≤ Ta ≤ 125°C )

Characteristics

Temperature Stability for Reference Voltage(Vref)

Temperature Stability for Multiplier Gain(K)

Symbol

∆Vref (Typ)

∆K/∆T (Typ)

Value

20

-0.2

Unit

V

mA

mA

mA

V

°C

°C

W

°C/W

Unit

mV

%/°C

3

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