SG1842 データシートの表示（PDF） - Microsemi Corporation

部品番号

コンポーネント説明

メーカー

SG1842

Current Mode PWM Controller

Microsemi Corporation 

Typical Application Circuits

8 (14)

RT

2N222A

RSLOPE

From VO

Ri

Rd

CF

4 (7)

CT

2 (3)

RF

1 (1)

5V

+

2.5V

UVLO

SG1842/43

SR

5V

REF

VREF

GOOD LOGIC

5V

INTERNAL

BIAS

OSCILLATOR

+

ERROR

AMP

2R

R

CS

COMP

1V

PWM

LATCH

5(9)

VCC

VIN

7 (12)

7 (11)

Q1

6 (10)

5 (8)

3 (5)

R

C

RS

VO

+

Figure 25 · Slope Compensation

Due to inherent instability of current mode converters running above 50% duty cycle, slope

compensation should be added to either current sense pin or the error amplifier. Figure 25 shows a

typical slope compensation technique.

17

Share Link: