- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299864 > R5220K042A-TR (RICOH COMPANY LTD) 0.8 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, DSO6 PDF資料下載
參數(shù)資料
| 型號(hào)： | R5220K042A-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.8 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, DSO6 |
| 封裝： | 2.50 X 1.40 MM, PLP-25 |
| 文件頁數(shù)： | 24/25頁 |
| 文件大小： | 521K |
| 代理商： | R5220K042A-TR |
R5220x
8
OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS
When P-channel Tr. of LX is ON:
(Wherein, Ripple Current P-P value is described as IRP, ON resistance of P-channel Tr. and N-channel Tr. of LX
are respectively described as RONP and RONN, and the DC resistor of the inductor is described as RL.)
VIN
= VOUT + (RONP + RL) × IOUT + L × IRP / ton ...................................................................Equation 2
When P-channel Tr. of LX is "OFF"(N-channel Tr. is "ON"):
L
× IRP / toff = RONN × IOUT + VOUT + RL × IOUT ..................................................................Equation 3
Put Equation 3 to Equation 2 and solve for ON duty of P-channel transistor, ton/(toff
+ton)=DON,
DON
= (VOUT – RONN × IOUT + RL × IOUT) / (VIN + RONN × IOUT – RONP × IOUT)............................Equation 4
Ripple Current is as follows;
IRP
= (VIN VOUT RONP × IOUT RL × IOUT) × DON / fosc / L................................................Equation 5
wherein, peak current that flows through L, and LX Tr. is as follows;
ILmax
= IOUT + IRP / 2 ......................................................................................................Equation 6
Consider ILmax, condition of input and output and select external components.
The above explanation is directed to the calculation in an ideal case in continuous mode.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R5220D151A-TR-F | 0.8 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, PDSO6 |
| R5220D281B-TR-F | 0.8 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, PDSO6 |
| R5324D005A-TR-F | FIXED POSITIVE LDO REGULATOR, PDFP8 |
| R5324D006A-TR-F | FIXED POSITIVE LDO REGULATOR, PDFP8 |
| R5324D007A-TR-F | FIXED POSITIVE LDO REGULATOR, PDFP8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R5220K042B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM Step-down DC/DC Converter with switch function |
| R5220K101A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM Step-down DC/DC Converter with switch function |
| R5220K101B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM Step-down DC/DC Converter with switch function |
| R5220K111A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM Step-down DC/DC Converter with switch function |
| R5220K111B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM Step-down DC/DC Converter with switch function |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。