參數(shù)資料
型號(hào): LM27241
廠商: National Semiconductor Corporation
英文描述: Synchronous Buck Regulator Controller for Mobile Systems
中文描述: 同步降壓穩(wěn)壓控制器,用于移動(dòng)通信系統(tǒng)
文件頁(yè)數(shù): 19/27頁(yè)
文件大?。?/td> 1336K
代理商: LM27241
Application Information
(Continued)
COMPENSATION
20120144
Modulator Gain
The LM27241 input voltage feed forward mechanism
changes the Error Amp ramp slope, and peak to peak volt-
age. The DC gain of the Modulator is dependent on the peak
to peak voltage of the oscillator’s ramp. The oscillator peak
to peak voltage can be determined by referring back to the
Oscillator section in the Electrical Characteristics table.
This ratio for the above equation is usually between 9.5 for
lower input voltages and as low as 8 higher input voltages.
The DC Gain of the power stage for a Buck-Converter is
equal to V
/D, which is equal to V
, and this is where the
term in the numerator in the above equation is obtained.
Output Filter Gain
20120146
Exact Filter Gain
20120147
Reduces to proper form with the understanding that:
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM27241MTC 制造商:Texas Instruments 功能描述:PWM CONTROLLER SMD 27241 TSSOP20
LM27241MTC/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP 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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 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 ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
LM27241MTCX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Buck Regulator Controller for Mobile Systems
LM27241MTCX/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP 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:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP(0.300",7.62mm) 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF)
LM27243A E WAF 制造商:Texas Instruments 功能描述: