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參數資料
| 型號： | TPS55383PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-26 |
| 文件頁數： | 13/45頁 |
| 文件大小： | 1318K |
| 代理商： | TPS55383PWPRG4 |
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(
)
300000
Fm
TPS55383
5
5.6 10
t
V
ON
6
IN
OUT
19.7
e
50 10
L
=
é
ù
-
ê
ú
-
+
÷
ê
ú
÷
è
ê
ú
(6)
4
V
Fm
2
10
IN
fc
6
V
Fm
50
10
IN
1
R
LOAD
-
=
+
÷ ÷
÷ ÷
è
(7)
EA
CO
LOAD
OUT
fc
K
20
log
1
2
f
R
C
= -
÷
+
p
è
(8)
1
2
3
4
16
15
14
13
PVDD2
BOOT2
SW2
BP
PVDD1
BOOT1
SW1
GND
TPS5538x
5
6
7
12
11
10
SEQ
ILIM2
FB2
EN1
EN2
FB1
L
C
OUT
R1
Output1
R2
C2
(optional)
UDG-08042
8
9
COMP2
COMP1
R
COMP
C
COMP
C1
(optional)
Z
UPPER
Z
LOWER
L
C
OUT
C1
R1
=
(9)
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
The overall DC gain of the of the converter control-to-output transfer function is approximated by:
The next step is to find the desired gain of the error amplifier at the desired crossover frequency. Assuming a
single pole roll off, evaluate the following expression at the desired crossover frequency.
Figure 24. Loop Compensation Components
If operating at wide duty cycles (over 50%), a capacitor may be necessary across the upper resistor of the
voltage setting divider. (Ref Figure 24) If duty cycles are less than 50%, this capacitor may be omitted.
If a high ESR capacitor is used in the output filter, a zero appears in the loop response that could lead to
instability. To compensate, a small capacitor is placed in parallel with the lower voltage setting divider resistor
(Ref Figure 24). The value of the capacitor is determined such that a pole is placed at the same frequency as the
ESR zero. If low ESR capacitors are used, this capacitor may be omitted.
20
Copyright 2008, Texas Instruments Incorporated
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS55386EVM-363 | 功能描述:電源管理IC開發工具 TPS55386EVM-363 Eval Mod RoHS:否 制造商:Maxim Integrated 產品: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/直流開關調節器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPG4 | 功能描述:直流/直流開關調節器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPR | 功能描述:直流/直流開關調節器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPRG4 | 功能描述:直流/直流開關調節器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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