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參數(shù)資料
| 型號： | TPS40074RHLT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | GREEN, PLASTIC, QFN-20 |
| 文件頁數(shù)： | 9/41頁 |
| 文件大小： | 765K |
| 代理商： | TPS40074RHLT |
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INTERNAL REGULATORS
25
5
10
20
15
30
4.10
4.00
4.05
4.15
4.20
4.35
4.25
4.30
4.40
4.45
4.50
INPUT VOLTAGE
vs
LOW VOLTAGE BYPASS VOLTAGE
VDD Input Voltage V
V
D
B
P
Low
V
oltage
Bypass
V
oltage
V
INPUT VOLTAGE
vs
DBP VOLTAGE
VDD Input Voltage V
V
D
B
P
Driver
Bypass
V
oltage
V
0
5
4
5
10
15
20
25
7
6
9
8
10
DIFFERENTIAL SENSE AMPLIFIER
SLUS617B – APRIL 2005 – REVISED OCTOBER 2006
APPLICATION INFORMATION (continued)
The internal regulators are linear regulators that provide controlled voltages for the drivers and the internal
circuitry to operate from. The low-side driver operates directly from the 8-V regulator supply while the high-side
driver bootstrap capacitor is charged from this supply. The actual voltage delivered to the high-side driver is the
voltage on the DBP pin less any drop from the bootstrap diode. If the internal bootstrap diode is used, the drop
across that diode is nominally 1.4 V at room temperature. This regulator has two modes of operation. At
voltages below 8.5 V on VDD, the regulator is in a low dropout mode of operation and tries to provide as little
impedance as possible from VDD to DBP. When VDD is above 10 V, the regulator regulates DBP to 8 V.
Between these two voltages, the regulator is in whatever state it was in when VDD entered this region. The
LVBP pin is connected to a 4.2-V regulator that supplies power for the internal control circuitry. Small amounts of
current can be drawn from these pins for other external circuit functions, as long as power dissipation in the
controller chip remains at acceptable levels and junction temperature does not exceed 125°C. Any external load
connected to LVBP should be electrically quiet to avoid degrading performance of the TPS40074. Typical output
voltages for these two regulators are shown in Figure 12 and Figure 13.
Figure 12.
Figure 13.
The TPS40074 has an on board differential amplifier intended for use as a remote sensing amplifier for the
output voltage. Use of this amplifier for remote sensing eliminates load regulation issues due to voltage drops
that occur between the converter and the actual point of load. The amplifier is powered from the DBP pin and
can be used to monitor output voltages up to 6 V with a DBP voltage of 8 V. For lower DBP voltages, the sense
amplifier can be used to monitor output voltages up to 2-V below the DBP voltage. The internal resistors used to
configure the amplifier for unity gain match each other closely, but their absolute values can vary as much as
30%, so adding external resistance to alter the gain is not accurate in a production environment.
17
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| TPS40074RHLTG4 | 功能描述:DC/DC 開關控制器 Mid Input Sync Buck w/Vltg Feed-Fwd 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 |
| TPS40075 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V TO 18V INPUT 10 PIN SYNCHRONOUS BUCK CONTROLLER WITH POWER GOOD |
| TPS40075EVM-001 | 功能描述:電源管理IC開發(fā)工具 15A 12V In 1.5V Out Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS40075RHLR | 功能描述:DC/DC 開關控制器 Wide Input Synch Buck Controller 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 |
| TPS40075RHLRG4 | 功能描述:DC/DC 開關控制器 Wide Input Synch Buck Controller 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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