參數(shù)資料
型號(hào): SG2843Y
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, CDIP8
封裝: HERMETIC SEALED, CERAMIC, DIP-8
文件頁(yè)數(shù): 13/14頁(yè)
文件大?。?/td> 224K
代理商: SG2843Y
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(guān)PDF資料
PDF描述
SG2842D CURRENT MODE PWM CONTROLLER
SG2842DM CURRENT MODE PWM CONTROLLER
SG2842J CURRENT MODE PWM CONTROLLER
SG2842M CURRENT MODE PWM CONTROLLER
SG2842N CURRENT MODE PWM CONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SG2844D 制造商:Microsemi Corporation 功能描述:CURRENT MODE PWM CNTRLR 200MA 14SOIC - Bulk
SG2844DM 功能描述:IC PWM CURRENT MODE 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器,離線開(kāi)關(guān) 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 輸出隔離:隔離 頻率范圍:61kHz ~ 71kHz 輸入電壓:9.4 V ~ 28 V 輸出電壓:12V 功率(瓦特):- 工作溫度:-40°C ~ 125°C 封裝/外殼:SC-74,SOT-457 供應(yīng)商設(shè)備封裝:6-TSOP 包裝:帶卷 (TR)
SG2844J 制造商:Microsemi Corporation 功能描述:SG2844J - Bulk
SG2844M 功能描述:IC PWM CURRENT MODE 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器,離線開(kāi)關(guān) 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 輸出隔離:隔離 頻率范圍:61kHz ~ 71kHz 輸入電壓:9.4 V ~ 28 V 輸出電壓:12V 功率(瓦特):- 工作溫度:-40°C ~ 125°C 封裝/外殼:SC-74,SOT-457 供應(yīng)商設(shè)備封裝:6-TSOP 包裝:帶卷 (TR)
SG2844N 制造商:Microsemi Corporation 功能描述:SG2844N - Bulk