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參數(shù)資料
| 型號： | SG2842J |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE PWM CONTROLLER |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP14 |
| 封裝： | HERMETIC SEALED, CERAMIC, DIP-14 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 224K |
| 代理商： | SG2842J |
C
U R R E N T
-M
O D E
PWM C
O N T R O L L E R
SG1842/SG1843 Series
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
13
Copyright 2000
Rev. 1.6 4/00
P
R O D U C T I O N
D
A T A
S
H E E T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
(continued)
FIGURE 23.
— SLOPE COMPENSATION
High-peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be
connected to pin 5 in a single point ground. The transistor and 5k potentiometer are used to sample the oscillator waveform and apply
an adjustable ramp to pin 3.
Due to inherent instability of current mode converters running above 50% duty cycle, a slope compensation should be added to
either current sense pin or the error amplifier. Figure 23 shows a typical slope compensation technique.
OSCILLATOR
V
REF
GOOD LOGIC
S
R
5V
REF
INTERNAL
BIAS
8(14)
4(7)
2(3)
1(1)
R
F
C
F
R
d
R
i
From V
O
R
SLOPE
2N222A
R
T
5V
UVLO
2.5V
ERROR
AMP
C
T
1V
2R
R
C.S.
COMP
PWM
LATCH
5(9)
3(5)
5(8)
C
R
S
R
6(10)
7(11)
7(12)
V
CC
V
O
Q1
SG1842/43
V
IN
5V
FIGURE 24.
— OPEN LOOP LABORATORY FIXTURE
2
3
4
8
7
6
5
COMP
V
FB
I
SENSE
R
T
C
T
V
REF
V
CC
OUTPUT
GROUND
0.1μF
0.1μF
A
SG1842/43
R
T
2N2222
100K
4.7K
1K
4.7K
5K
I
ADJUST
ERROR AMP
ADJUST
C
T
1K
GROUND
OUTPUT
V
CC
V
REF
1
相關PDF資料 |
PDF描述 |
|---|---|
| SG2842M | CURRENT MODE PWM CONTROLLER |
| SG2842N | CURRENT MODE PWM CONTROLLER |
| SG1842 | CURRENT MODE PWM CONTROLLER |
| SG1842J | CURRENT MODE PWM CONTROLLER |
| SG1842L | CURRENT MODE PWM CONTROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SG2842L | 制造商:Microsemi Corporation 功能描述:DRIVER - MEDIUM CURRENT ARRAY - Bulk |
| SG2842M | 功能描述:IC REG CTRLR FLYBK ISO PWM 8-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| SG2842N | 制造商:Microsemi Corporation 功能描述:SG2842N - Bulk |
| SG2842Y | 制造商:Microsemi Corporation 功能描述:SG2842Y - Bulk |
| SG2843D | 制造商:Microsemi Corporation 功能描述:SG2843D - Bulk |
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