- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98283 > TPS55383PWPRG4 (TEXAS INSTRUMENTS INC) 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | TPS55383PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-26 |
| 文件頁數(shù)： | 15/45頁 |
| 文件大?。?/td> | 1318K |
| 代理商： | TPS55383PWPRG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
OUT
DIODE
IN
DIODE
V
+
d =
+
(14)
Light Load Operation
I
DCM =
1
2
d
T
S
V
IN
OUT
-
L
(15)
Inductor
Current
V
OUT
Ripple
SW Waveform
Steady State
V
IN
= 12 V
V
OUT
= 5 V
SW Waveform
V
OUT
Ripple
Inductor
Current
Skipping
V
IN
= 12 V
V
OUT
= 5 V
SW Node Ringing
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
DESIGN HINT
Ensure that under ALL conditions of line and load regulation, there is sufficient duty
cycle to maintain output voltage regulation.
To calculate the operating duty cycle, use Equation 14.
where
V
DIODE is the forward voltage drop of the rectifier diode
There is no special circuitry for pulse skipping at light loads. The normal characteristic of a nonsynchronous
converter is to operate in the discontinuous conduction mode (DCM) at an average load current less than
one-half of the inductor peak-to-peak ripple current. Note that the amplitude of the ripple current is a function of
input voltage, output voltage, inductor value, and operating frequency, as shown in Equation 15.
During discontinuous mode operation the commanded pulse width may become narrower than the capability of
the converter to resolve. To maintain the output voltage within regulation, skipping switching pulses at light load
conditions is a natural by-product of that mode. This condition may occur if the output capacitor is charged to a
value greater than the output regulation voltage and there is insufficient load to discharge the capacitor. A
by-product of pulse skipping is an increase in the peak-to-peak output ripple voltage.
Figure 25. Steady State
Figure 26. Skipping
DESIGN HINT
If additional output capacitance is required to reduce the output voltage ripple during
DCM operation, be sure to recheck the Maximum Output Capacitance section.
A portion of the control circuitry is referenced to the SW node. To ensure jitter-free operation, it is necessary to
decrease the voltage waveform ringing at the SW node to less than 5-V peak and of a duration of less than
30-ns. In addition to following good printed circuit board (PCB) layout practices, there are a couple of design
techniques for reducing ringing and noise.
22
Copyright 2008, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS5602IDBR | 3 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS5602IDBTRG4 | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS5602IDBTR | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS561000PWP | 1.4 A SWITCHING CONTROLLER, PDSO28 |
| TPS56100PWPR | 1.4 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS55386EVM-363 | 功能描述:電源管理IC開發(fā)工具 TPS55386EVM-363 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS55386PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。