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參數(shù)資料
| 型號(hào)： | XC9303 |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | Step-Up & Down DC / DC Controller ICs |
| 中文描述： | 升壓 |
| 文件頁(yè)數(shù)： | 8/18頁(yè) |
| 文件大小： | 244K |
| 代理商： | XC9303 |
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NOTES ON USE
1. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is 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 XC9303 series. The output
voltage's ripple voltage becomes substantially high under heavy load conditions, with the XC9303 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.
2. Ratings
Use the XC9303 series and peripheral components within the limits of their ratings.
3. Notes on How to Select Transistor
Synchronous rectification operation prepares fixed time when switching changes so that the high side PchMOSFET and the low side NchMOSFET do
not oscillate simultaneously. Also it is designed to prevent the penetratation current when the both MOSFET oscillate at the same time. However, some
MOSFET may oscillate simultaneously and worsen efficiency. Please select MOSFET with high Vth with small input capacity on high side PchMOSFET
and the low side NchMOSFET. (When using with large current, please note that there is a tendency for ON resistance to become large when the input
capacity of MOSFET is small and Vth is high.)
<The check method of whether selected MOSFET is oscillating simultaneously>
In order to check that MOSFET is not oscillating simultaneously, please observe Lx terminal waveform of coil current at the time of the continuation
mode. If the MOSFET parasitism diode waveform on Lx terminal waveform can be formed in the period EXT 1 is 'H' and EXT2 is 'L', it can be thought
that MOSFETs are not oscillating simultaneously.
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TYPICAL APPLICATION CIRCUIT
8
XC9303 Series
High Efficiency, Synchronous
Step-Up & Down DC / DC Controller ICs
Diode Wave Form
CH3 : Lx
CH1 : EXT1
CH2 : EXT2
VDD
EXT1
PWM
CE
GND
EXT2
FB
PWM
CE
Tr1:Pch
MOSFET
RFB2
Tr2:Nch
MOSFET
CIN
VIN
CL
RFB1
CFB
VOUT
Tr3:Nch
MOSFET
SD
NC
Lx Pin
Semiconductor Ltd.
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| XC9303B03KL | Step-Up & Down DC / DC Controller ICs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9303_1 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:High Efficiency, Synchronous Step-Up & Down DC / DC Controller ICs |
| XC9303B03KL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Step-Up & Down DC / DC Controller ICs |
| XC9303B03KR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Step-Up & Down DC / DC Controller ICs |
| XC9303B093KR | 制造商:Torex Semiconductor LTD 功能描述: |
| XC9303B093KR-G | 功能描述:IC REG CTRLR BST PWM 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
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