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參數(shù)資料
| 型號： | IP1843J-BSS2 |
| 廠商： | TT electronics Semelab Limited |
| 英文描述： | Current Mode Regulating Pulse Width Modulator |
| 中文描述： | 電流模式調節(jié)脈沖寬度調制器 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 43K |
| 代理商： | IP1843J-BSS2 |
t
c
0.55 R
T
C
T
t
d
R
T
C
T
R
n
1
Resultant frequency f =(t
c
+ t
d
)
For R
T
> 5k
W
,
1.8
Resultant frequency f
(R
T
C
T
)
Oscillator timing capacitor C
T
is charged by V
REF
through R
T
and discharged by an internal current source.
During the discharge time, the internal clock signal
blanks the output to the low state. Selection of R
T
and
C
T
therefore determines both oscillator frequency and
maximum duty cycle. Charge and discharge times are
determined by the formulae:
.0063 R
T
–
2.3
.0063
–
4
( )
IP1842 SERIES
IP1843 SERIES
Prelim.3/00
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
http://www.semelab.co.ukOpen–Loop Laboratory Test Fixture
APPLICATIONS INFORMATION
High peak current associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should
be connected close to pin 5 in a single point ground. The transistor and 5K potentiometer are used to sample the oscillator wave
form and apply an adjustable ramp to pin 3.
1
2
3
4
8
7
6
5
COMP
V
REF
GROUND
OUTPUT
R
T
/C
T
V
CC
I
SENSE
V
FB
COMP
V
REF
GROUND
OUTPUT
1
2
3
4
POWER
GROUND
5
6
7
14
13
12
11
10
9
8
N/C
R
T
/C
T
I
SENSE
N/C
N/C
N/C
V
CC
V
FB
V
C
Oscillator Waveforms and Maximum Duty Cycle
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相關代理商/技術參數(shù) |
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|---|---|
| IP1843J-DESC | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:Current Mode Regulating Pulse Width Modulator |
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| IP1844A | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
| IP1844AJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| IP1844J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
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