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參數(shù)資料
| 型號： | UC3842A-S08-T |
| 廠商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE PWM CONTROL CIRCUITS |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 106K |
| 代理商： | UC3842A-S08-T |
UC3842A/3843A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 9
QW-R103-002,D
CURRENT S ENS E CIRCUIT
5
3
1
2R
R
1V
C
Rs
R
Is
Error Amplifier
Current Sense Comparator
Peak current (Is) determined by the formula: Ismax=10V/Rs.
A small RC filter be required to suppress switch transients.
S LOPE COMPENS AT ION
8
4
3
Isense
R1
R2
Rsense
C
RT
CT
0
μ
F
A fraction of the oscillator ramp can be resistively summed with the current sense signal to provide slope
compensation for converts requiring duty cycles over 50%.Note that capacitor C, forms a filter with R2 to suppress
the leading edge switch spikes.
OS CILLAT OR S ECT ION
5
4
8
RT
CT
Large RT
Small CT
Small RT
Large CT
V4
V4
INTERNAL CLOCK
INTERNAL CLOCK
Dead time vs. C
T
(R
T
>5k
) Timing Resistance vs. Frequency
1
10
100
1
10
100
0.1
t
s
CT (nF)
100
1
10
6
10
5
10
4
10
3
10
102
R
)
Frequency (Hz)
CT=2.2nF
CT=4.7nF
CT=10nF
CT=22nF
CT=47nF
CT=100nF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC3843A-D08-T | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3843AL-D08-T | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3843AL-S08-R | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3843AL-S08-T | CURRENT MODE PWM CONTROL CIRCUITS |
| UC3843A-S08-R | CURRENT MODE PWM CONTROL CIRCUITS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3842AY | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC3842B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER |
| UC3842B/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Performance Current Mode Controller |
| UC3842B_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3842B_08 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
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