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參數(shù)資料
| 型號： | UC4844A |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Current Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大小： | 661K |
| 代理商： | UC4844A |
6
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
APPLICATIONS DATA (cont.)
Oscillator Section
Open-Loop Laboratory Test Fixture
Oscillator Frequency vs Timing Resistance
Maximum Duty Cycle vs Timing Resistor
High peak currents associated with capacitive loads necessi-
tate careful grounding techniques. Timing and bypass capaci-
tors should be connected close to pin 5 in a single point
ground. The transistor and 5k potentiometer are used to sam-
ple the oscillator waveform and apply an adjustable ramp to
pin 3.
Slope Compensation
A fraction of the oscillator ramp can be resistively
summed with the current sense signal to provide slope
compensation for converters requiring duty cycles over
50%.
Note that capacitor, C, forms a filter with R2 to suppress
the leading edge switch spikes.
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| UC4845A | Current Mode PWM Controller |
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| UC1844A | CURRENT MODE PWM CONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| UC4845A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC494 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Advanced Regulating Pulse Width Modulators |
| UC494 DIE | 制造商:Texas Instruments 功能描述: |
| UC494 WAF | 制造商:Texas Instruments 功能描述: |
| UC494A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Advanced Regulating Pulse Width Modulators |
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