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參數資料
| 型號： | NCP1217P65G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩壓器 |
| 英文描述： | Enhanced PWM Current−Mode Controller for High−Power Universal Off−Line Supplies |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, 71.5 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | LEAD FREE, PLASTIC, DIP-8 |
| 文件頁數： | 11/18頁 |
| 文件大小： | 249K |
| 代理商： | NCP1217P65G |
NCP1217, NCP1217A
http://onsemi.com
11
Power P1
Power P2
Power P3
Figure 20. Output Pulses at Various Power Levels (X = 5.0 s/div) P1
P2
P3
Figure 21. The Skip Cycle Takes Place at Low Peak Currents which Guarantees NoiseFree Operation
315.40 U
882.70 U
1.450 M
2.017 M
2.585 M
300 M
200 M
100 M
0
MAX PEAK
CURRENT
SKIP CYCLE
CURRENT LIMIT
Sufficient margin shall be kept between normal Pin1 level and the latchoff point in order to avoid false triggering.
Ramp Compensation
Ramp compensation is a known mean to cure
subharmonic oscillations. These oscillations take place at
half the switching frequency and occur only during
Continuous Conduction Mode (CCM) with a dutycycle
greater than 50%. To lower the current loop gain, one usually
injects between 50 and 100% of the inductor downslope.
Figure 22 depicts how internally the ramp is generated.
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| NCP1218 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Controller with Adjustable Skip Level and External Latch Input |
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| NCP1219 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Controller with Adjustable Skip Level and External Latch Input |
| NCP1219AD100R2G | 功能描述:電流型 PWM 控制器 ANA PWM CONTROLLER RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1219AD65R2G | 功能描述:電流型 PWM 控制器 ANA PWM CONTROLLER RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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