- 您现在的位置：买卖IC网 > PDF目录199467 > TPS61500PWPR (TEXAS INSTRUMENTS INC) 5 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO14 PDF资料下载
参数资料
| 型号： | TPS61500PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | GREEN, PLASTIC, HTSSOP-14 |
| 文件页数： | 5/21页 |
| 文件大小： | 725K |
| 代理商： | TPS61500PWPR |
SELECTING THE SCHOTTKY DIODE
SELECTING THE COMPENSATION CAPACITOR AND RESISTOR
SELECTING THE INPUT AND OUTPUT CAPACITOR
out
in out
out
ripple
(V
V )I
C
=
V
Fs
V
-
(6)
ripple_ESR
out
ESR
V
= I
R
(7)
www.ti.com ........................................................................................................................................................................................... SLVS893 – DECEMBER 2008
Table 2. Recommended Inductors for TPS61500
Part Number
L (
H)
DCR Max (m
)
Saturation Current (A)
Size (L × W × H mm)
VENDOR
D104C2
10
44
3.6
10.4 × 10.4 × 4.8
TOKO
VLF10040
15
42
3.1
10.0 × 9.7 × 4.0
TDK
CDRH105RNP
22
61
2.9
10.5 × 10.3 × 5.1
Sumida
MSS1038
15
50
3.8
10.0 × 10.2 × 3.8
Coilcraft
The high switching frequency of the TPS61500 demands a high-speed rectification for optimum efficiency.
Ensure that the diode’s average and peak current rating exceed the average output current and peak inductor
current. In addition, the diode’s reverse breakdown voltage must exceed the switch FET rating voltage of 40V.
So, the VISHAY SS3P6L-E3/86A is recommended for TPS61500. The power dissipation of the diode's package
must be larger thant the IOUT(max) x VD
The TPS61500 has an external compensation, COMP pin, which allows the loop response to be optimized for
each application. The COMP pin is the output of the internal error amplifier. An external ceramic capacitors C4
are connected to COMP pin to stabilize the feedback loop. Use 470-nF for C4.
The output capacitor is mainly selected to meet the requirements for the output ripple and loop stability. This
ripple voltage is related to the capacitor’s capacitance and its equivalent series resistance (ESR). Assuming a
capacitor with zero ESR, the minimum capacitance needed for a given ripple can be calculated by
where, Vripple = peak to peak output ripple. The additional output ripple component caused by ESR is calculated
using:
Due to its low ESR, Vripple_ESR can be neglected for ceramic capacitors, but must be considered if tantalum or
electrolytic capacitors are used.
Care must be taken when evaluating a ceramic capacitor’s derating under dc bias, aging and AC signal. For
example, larger form factor capacitors (in 1206 size) have their self resonant frequencies in the range of the
switching frequency. So the effective capacitance is significantly lower. The DC bias can also significantly reduce
capacitance. Ceramic capacitors can loss as much as 50% of its capacitance at its rated voltage. Therefore,
almost leave margin on the voltage rating to ensure adequate capacitance at the required output voltage.
The capacitor in the range of 1uF to 4.7
F is recommended for input side. The output requires a capacitor in the
range of 1
F to 10F. The output capacitor affects the loop stability of the boost regulator. If the output capacitor
is below the range, the boost regulator can potentially become unstable.
The popular vendors for high value ceramic capacitors are:
Copyright 2008, Texas Instruments Incorporated
13
Product Folder Link(s): TPS61500
相关PDF资料 |
PDF描述 |
|---|---|
| TPS61500PWP | 5 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO14 |
| TPS65111RGERG4 | SWITCHED CAPACITOR REGULATOR, 520 kHz SWITCHING FREQ-MAX, PQCC24 |
| TPS65148RHBR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| TPS65181RGZR | POWER SUPPLY MANAGEMENT CKT, PQCC48 |
| TPS721A | FIBER OPTIC PHOTODIODE DETECTOR, THROUGH HOLE MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS615B(F) | 制造商:Toshiba America Electronic Components 功能描述: |
| TPS615C(F) | 制造商:Toshiba America Electronic Components 功能描述: |
| TPS615F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Silicon NPN Epitaxial Planar |
| TPS616 | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:PHOTO TRANSISTOR SILICON NPN EPITAXIAL PLANAR |
| TPS616(F) | 制造商:Toshiba America Electronic Components 功能描述: |
发布紧急采购，3分钟左右您将得到回复。