- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67755 > L6731D (STMICROELECTRONICS) 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | L6731D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | HTSSOP-16 |
| 文件頁數(shù)： | 10/23頁 |
| 文件大?。?/td> | 386K |
| 代理商： | L6731D |
Application details
L6731D
18/23
For a given inductor value, minimum input voltage, output voltage and maximum load
transient, a maximum ESR and a minimum Cout value can be set. The ESR and Cout
values also affect the static output voltage ripple. In the worst case the output voltage ripple
can be calculated with the following formula:
Equation 6
Usually the voltage drop due to the ESR is the biggest one while the drop due to the
capacitor discharge is almost negligible.
6.3
Input capacitors
The input capacitors have to sustain the RMS current flowing through them, that is:
Equation 7
Where D is the duty cycle. The equation reaches its maximum value, IOUT /2 with D = 0.5.
The losses in worst case are:
Equation 8
6.4
Compensation network
The loop is based on a voltage mode control (Figure 18.). The output voltage is regulated to
the internal/external reference voltage and scaled by the external resistor divider. The error
amplifier output VCOMP is then compared with the oscillator triangular wave to provide a
pulse-width modulated (PWM) with an amplitude of VIN at the PHASE node. This waveform
is filtered by the output filter. The modulator transfer function is the small signal transfer
function of VOUT/VCOMP. This function has a double pole at frequency FLC depending on the
L-COUT resonance and a zero at FESR depending on the output capacitor's ESR. The DC
Gain of the modulator is simply the input voltage VIN divided by the peak-to-peak oscillator
voltage: VOSC.
)
8
1
(
Fsw
Cout
ESR
I
Vout
L
+
=
)
1
(
D
Iout
Irms
=
2
)
5
.
0
(
Iout
ESR
P
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L9230-DIE1 | STEPPER MOTOR CONTROLLER, UUC |
| L9230 | STEPPER MOTOR CONTROLLER, PDSO20 |
| LA5680T | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
| LA5681T | SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQFP48 |
| LA79500E | 6-CHANNEL, VIDEO MULTIPLEXER, QFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6731DTR | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6732 | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732C | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。