- 您现在的位置：买卖IC网 > PDF目录98282 > TPS54110PWP (TEXAS INSTRUMENTS INC) 3.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 PDF资料下载
参数资料
| 型号： | TPS54110PWP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 3/30页 |
| 文件大小： | 870K |
| 代理商： | TPS54110PWP |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
LC
OUT
L
C
1
=
2p
Z
R C
1
=
2p 3 6
Z
R C
2
1
=
2p 1 8
P
R C
1
=
2p 5 8
P
R C
2
1
=
2p 3 7
INT
R C
1
=
2p 1 6
-
CO
INT
0.74
10
=
2
INT
C
R
1
6 =
2p 1
LC
R
C
1
1 =
2p 6
SLVS500C
– DECEMBER 2003 – REVISED FEBRUARY 2011
There are a number of different ways to design a compensation network. This procedure outlines a relatively
simple procedure that produces good results with most output filter combinations. Use the SWIFT Designer
Software for designs with unusually high closed-loop crossover frequencies; with low-value, low-ESR output
capacitors such as ceramics; or if you are unsure about the design procedure.
A number of considerations apply when designing compensation networks for the TPS54110. The compensated
error-amplifier gain must not be limited by the open-loop amplifier gain characteristics and must not produce
excessive gain at the switching frequency. Also, the closed-loop crossover frequency must be set less than one
fifth of the switching frequency, and the phase margin at crossover must be greater than 45 degrees. The
general procedure outlined here meets these requirements without going into great detail about the theory of
loop compensation.
First, calculate the output filter LC corner frequency using Equation 10:
(10)
For the design example,
LC = 6103 Hz.
Choose a closed-loop crossover frequency greater than fLC and less than one fifth of the switching frequency.
Also, keep the crossover frequency below 100 kHz, as the error amplifier may not provide the desired gain at
higher frequencies. The 60-kHz crossover frequency chosen for this design provides comparatively wide loop
bandwidth while still allowing adequate phase boost to ensure stability.
Next, the values for the compensation components that set the poles and zeros of the compensation network are
calculated. Assuming an R1 value
> than R5 and a C6 value > C7, the pole and zero locations are given by
Equation 11 through Equation 14:
(11)
(12)
(13)
(14)
Additionally there is a pole at the origin, which has unity gain at a frequency:
(15)
This pole is used to set the overall gain of the compensated error amplifier and determines the closed loop
crossover frequency. Since R1 is given as 10 k
Ω and the crossover frequency is selected as 60 kHz, the desired
(16)
And the value for C6 is given by Equation 17:
(17)
Since C6 is calculated to be 2900 pF, and the location of the integrator crossover frequency is important in
setting the overall loop crossover, adjust the value of R1 so that C6 is a standard value of 2700 pF, using
(18)
The value for R1 is 10.7 K
Ω
2003–2011, Texas Instruments Incorporated
11
Product Folder Link(s): TPS54110
相关PDF资料 |
PDF描述 |
|---|---|
| TPS54110PWPG4 | 3.5 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| TPS54140QDRCRQ1 | SWITCHING REGULATOR, PDSO10 |
| TPS54160DRCT | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54160DGQ | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54160DGQR | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54110PWPG4 | 功能描述:直流/直流开关调节器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54110PWPR | 功能描述:直流/直流开关调节器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54110PWPRG4 | 功能描述:直流/直流开关调节器 1.5A Step Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54110-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-V TO 6-V INPUT, 1.5-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT?￡a) |
| TPS54110QPWPRQ1 | 功能描述:直流/直流开关调节器 3-6V Input 1.5A Out Synch Buck PWM Swer RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。