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參數(shù)資料
| 型號(hào)： | XC9503 |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 2ch.Step-Down DC/DC Controller ICs |
| 中文描述： | 2ch.Step型DC / DC控制器芯片 |
| 文件頁(yè)數(shù)： | 11/32頁(yè) |
| 文件大小： | 1803K |
| 代理商： | XC9503 |
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XC9503
Series
■
NOTES ON USE
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is low (e.g, from 4.5V to 5.0V) or high (e.g.,
from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under
continuous-duty condition is smaller than the PFM duty ratio of the XC9503 series. The output voltage's ripple voltage
becomes substantially high under heavy load conditions, with the XC9503 series appearing to be producing an abnormal
oscillation. If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM
setting. For use under the above-mentioned condition, measured data of PWM/PFM automatic switching control shown
on the data sheets are available up to I
OUT
= 100 mA.
1. Checking for Intermittent Oscillation
The XC9503 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low
(e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under
your operating conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance
C
L
.
3. Ratings
Use the XC9503 series and external components within the limits of their ratings.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XC9503_1 | 2ch.Step-Down DC/DC Controller ICs |
| XC9504B092CAL | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B092CAR | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B092CDL | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
| XC9504B092CDR | 2 ch. Step-Up / Inverting DC/DC Controller ICs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9503_1 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch.Step-Down DC/DC Controller ICs |
| XC9503B092 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch Step-down DC/DC Controller ICs |
| XC9503B092A | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch Step-down DC/DC Controller ICs |
| XC9503B092AL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch Step-down DC/DC Controller ICs |
| XC9503B092AR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:2ch Step-down DC/DC Controller ICs |
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