- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299836 > R1215D002F-TR-F (RICOH COMPANY LTD) 0.08 A SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數(shù)資料
| 型號(hào)： | R1215D002F-TR-F |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.08 A SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | ROHS COMPLIANT, SON-8 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 363K |
| 代理商： | R1215D002F-TR-F |
R1215D
12
TIMING CHART
<Soft-start Operation>
The timing chart below describes the state of each pin from the power-on until the IC entering the stable
operation.
By raising the voltage of the DTC pin slowly, the switching duty cycle is limited, and prevent the drastic voltage
rising (over-shoot) and inrush current.
When the VIN voltage becomes equal or more than the UVLO released voltage (VUVLO
+VHYS), VREFOUT operation
starts. Following with the increase of the voltage level of VREFOUT, the internal oscillator begins to operate, then
the DTC voltage is also rising, then, soft-start operation starts. When the DTC voltage crosses the chopping
wave level inside the IC, EXT pin starts switching, then, step-up operation begins. During this term, the output
voltage does not reach the set output voltage. Therefore the output of the amplifier is "H". Besides, the protection
circuit may work and the IC charges the DELAY pin. Because of this, the soft-start time should be set shorter
than the latch protection delay time.
After the initial stage, when the output voltage reaches the set output voltage, the level of AMPOUT becomes
the normal state. In other words, the level is determined with the input voltage, the output voltage, and the output
current. When the level of AMPOUT becomes falling, charging the DELAY pin stops and discharges to the GND.
The soft-start time (the time for the DTC pin voltage becoming to VDTC level) can be estimated with the next
formula.
t
1/α×ln(VDTC×α/β+1), herein, α=1/C7×(1/R5+1/R6), and β=VREFOUT/(C7×R5).
C7
R5
R6
VREFOUT
DTC
OSC
AMPOUT
DTC
VIN
VREFOUT
(VUVLO+VHYS)
EXT
DELAY
Soft-start Time
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R1215D002A-TR-F | 0.08 A SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO8 |
| R1218K042A-TR | 1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, DSO6 |
| R1223N3.62E-TL | Analog IC |
| R1223N3.62E-TR | Analog IC |
| R1223N3.62F-TL | Analog IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R12163 | 功能描述:烙鐵 IDEAL THERMOTIP 500W RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included |
| R121630003 | 功能描述:RF 連接器 SSMA HERMETIC SLDR MNT RCPT RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
| R121653000 | 功能描述:RF 連接器 EMB A PLAT COUD SORT A SOUDER RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
| R12166 | 功能描述:烙鐵 Pencil Grip W/1/8" dia. C RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included |
| R12168 | 功能描述:烙鐵 PENCIL GRIP HAND PIECE CARBON ELECTRO RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。