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參數(shù)資料
| 型號(hào)： | TPIC74100QPWPRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 440 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數(shù)： | 2/30頁 |
| 文件大?。?/td> | 781K |
| 代理商： | TPIC74100QPWPRQ1 |
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Modulator Frequency Setting (Terminal Rmod)
Ground Terminal (PGND)
Enable Terminal (ENABLE)
Bootstrap Terminals (Cboot1 and Cboot2)
Functional Modes
Clock Modulator
Buck/Boost Transitioning
BUCK/BOOST SWITCH-MODE REGULATOR
SLIS125 – DECEMBER 2006
See the converter efficiency plots in the Typical Characteristics section to determine power dissipation.
The Rmod terminal adjusts the clock modulator frequency. A resistor of Rmod = 12 k generates a modulation
frequency of 28 kHz. The modulator function may be disabled by connecting Rmod to GND and the device
operates with the nominal frequency. The modulator function cannot be activated during IC operation, only at IC
start-up.
The PGND terminal is the power ground for the device.
The ENABLE terminal allows the enabling and disabling of the switch mode regulator. A maximum of 40 V may
be applied to this terminal to enable the device and increasing it above the V(driver) input voltage does not affect
the device operation.
The functionality of the ENABLE terminal is described in the following table:
ENABLE
Function
0
Vreg is off.
Open
Undefined
1
Vreg is on.
An external bootstrap capacitor is required for driving the internal high-side MOSFET switch. A 4.7-nF ceramic
capacitor is typically required.
To minimize EMI issues associated with the switch-mode regulator, the device offers an integrated clock
modulator. The function of the clock modulator is to modulate the switching frequency and to distribute the
energy over the wave band.
The average switching frequency is 440 kHz (typical) and varies between 330 kHz and 550 kHz at a rate set by
the Rmod resistor. A typical value of 12 k on the Rmod terminal relates to a 28-kHz modulation frequency. The
clock modulator function can only be activated during IC start-up, not during IC operation.
The equation for the modulation frequency is as follows:
f(mod) (Hz) = (–2.2 × Rmod) + 54.5 kHz, when Rmod = 8 k to 16 k
The operation mode switches automatically between buck and boost modes depending on the input voltage of
V(driver) and output load conditions. During start up, when V(driver) is less than 5.8 V (typical), the device starts in
boost mode and continues to run in boost mode until V(driver) exceeds 5.8 V; at which time, the device switches
over to buck mode. In buck mode, the device continues to run in buck mode until it is required to switch back to
boost to hold regulation. This crossover window to switch to boost mode is when V(driver) is between 5.8 V and
5 V and depends on the loading conditions. When Vdriver drops below 5.8 V but the device is holding regulation
(~2%), the device remains in buck mode. However, when V(driver) is within the 5.8-V to 5-V window and VOUT
drops to 4.9 V, the device crosses over to boost mode to hold regulation. In boost mode, the device remains in
boost mode until V(driver) exceeds 5.8 V; at which time, the device enters the buck mode. When the device is
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPIC74100QPWPRQ1 | 制造商:Texas Instruments 功能描述:SWITCHING REG BUCK/BOOST 20HTSSOP |
| TPIC74101EVM | 功能描述:電源管理IC開發(fā)工具 TPIC74101 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPIC74101-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BUCK/BOOST SWITCH-MODE REGULATOR |
| TPIC74101QPWPRQ1 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 AC Buck/Boost Switch Mode Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPIC8101 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:KNOCK SENSOR INTERFACE |
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