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參數(shù)資料
| 型號： | TPS40211QDGQRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLATSIC, MSOP-10 |
| 文件頁數(shù)： | 16/41頁 |
| 文件大小： | 999K |
| 代理商： | TPS40211QDGQRQ1 |
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( )
HF
6
FB
1
C
2
1.5
10
R
=
p
G
105
R
Q
=
10
8
7
6
VDD
GDRV
ISNS
GND
TPS40210/11
L
V
IN
R
G
V
OUT
UDG-07196
www.ti.com
SLVS861D – AUGUST 2008 – REVISED APRIL 2010
The error amplifier GBWP will usually be higher, but is ensured by design to be at least 1.5 MHz. If the gain
required in Equation 25 multiplied by 10 times the desired control loop crossover frequency, the high-frequency
pole introduced by CHF is overridden by the error amplifier capability and the effective pole is lower in frequency.
If this is the case, CHF can be made larger to provide a consistent high-frequency roll off in the control loop
where
CHF is the high-frequency roll-off capacitor value in mF
RFB is the mid-band gain-setting resistor value in
(29)
Gate Drive Circuit
Some applications benefit from the addition of a resistor connected between the GDRV pin and the gate of the
switching MOSFET. In applications that have particularly stringent load regulation (under 0.75%) requirements
and operate from input voltages above 5 V, or are sensitive to pulse jitter in the discontinuous conduction region,
this resistor is recommended. The recommended starting point for the value of this resistor can be calculated
from Equation 30.
where
QG is the MOSFET total gate charge at 8-V VGS in nC.
RG is the suggested starting point gate resistance in .
(30)
Figure 28. Gate Drive Resistor
TPS40211
The only difference between the TPS40210 and the TPS40211 is the reference voltage that the error amplifier
uses to regulate the output voltage. The TPS40211 uses a 260-mV reference and is intended for applications
where the output is actually a current instead of a regulated voltage. A typical example of an application of this
type is an LED driver. An example schematic is shown in Figure 29.
Copyright 2008–2010, Texas Instruments Incorporated
23
Product Folder Link(s): TPS40210-Q1 TPS40211-Q1
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相關代理商/技術參數(shù) |
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| TPS40-22 | 制造商:TOTAL-POWER 制造商全稱:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
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| TPS40222DRPRG4 | 功能描述:DC/DC 開關控制器 1.6A 1.25MHz Buck Conv 3mm SON Pkg RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| TPS40222DRPT | 功能描述:DC/DC 開關控制器 1.6A 1.25MHz Buck Conv 3mm SON Pkg RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
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