25A4524 데이터 시트보기 (PDF) - Aeroflex Corporation

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25A4524

RadHard High Speed PWM Controller

Aeroflex Corporation 

VSOFT 10

2.5V

Error

Amp

2R

VFB 2

IS

COMP

8

1.4V

R

R

RS C

CURRENT

11 SENSE

GND

1V

12

Current

Sense

Comparators

SQ

RQ

Peak Current (Is) is determined by the formula:

ISMAX

=

1----.--0---V--

RS

or

ISMAX

=

V----S----O----F-----T----–-----1---.-4--

3RS

A small RC filter may be required to suppress switch transients

FIGURE 6 – Current Sense Circuit

120

80

Gain

dB 40

0

-40

1

Preliminary -55°C

+125°C

10

100

1K

10K

100K

1M

10M

Frequency Hz

FIGURE 7 – Error Frequency Amplifier Open-Loop Response

at +125°C & -55°C

SCD5031 Rev B

11

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