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參數(shù)資料
| 型號(hào)： | TS1935CX5RF |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1850 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | ROHS COMPLIANT, SOT-25, 5 PIN |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大小： | 0K |
| 代理商： | TS1935CX5RF |
TS1935
1.6MHz Boost Converter
with 30V Internal FET Switch
4/8
Version: A07
Function Block Diagram
Pin Description
The TS1935 is a switching converter IC that operates at a fixed frequency (1.6MHz) for fast transient response over a
wide input voltage range and incorporates pulse-by-pulse current limiting protection. Because this is current mode
control, a 33mΩ sense resistor in series with the switch FET is used to provide a voltage (which is proportional to the
FET current) to both the input of the pulse width modulation (PWM) comparator and the current limit amplifier.
At the beginning of each cycle, the S-R lath turns on the FET. As the current through the FET increases, a voltage
(proportional to this current) is summed with the ramp coming from the ramp generator and then fed into the input of
the PWM comparator. When this voltage exceeds the voltage on the other input (coming from the Gm amplifier), the
latch resets and turns the FET off. Since the signal coming from the Gm amplifier is derived from the feedback (which
samples the voltage at the output), the action of the PWM comparator constantly sets the correct peak current through
the FET to keep the output voltage in regulation.
Q1 & Q2 align with R3 – R6 form a bandgap voltage reference used by the IC to hold the output in regulation. The
currents flowing through Q1 & Q2 will be equal, and the feedback loop will adjust the regulated output to maintain this .
Because of this, the regulated output is always maintained at a voltage level equal to the voltage at the FB node
“multiplied up” by the ratio of the output resistive divider.
The current limit comparator feeds directly into the flip-flop that derives the switch FET. If the FET current reaches the
limit threshold, the FET is turned off and the cycle terminates the pulse regardless of the status of the output of the
PWM comparator.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS1937 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:Boost (Step-up) WLED Driver |
| TS19370 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:Boost (Step-up) WLED Driver with OVP |
| TS19370_10 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:Boost (Step-up) WLED Driver with OVP |
| TS19370CX6 | 功能描述:LED照明驅(qū)動(dòng)器 White LED driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TS19370CX6 RF | 制造商:Taiwan Semiconductor 功能描述:LED DRIVER WHITE BOOST 6SOT26 制造商:Taiwan Semiconductor 功能描述:LED DRIVER, WHITE, BOOST, 6SOT26 制造商:Taiwan Semiconductor 功能描述:IC, LED DRVR; Topology:Boost (Step Up); No. of Outputs:1; Output Current:320mA; Output Voltage:36V; Driver Case Style:SOT-26; Input Voltage Min:2.5V; Input Voltage Max:18V; Dimming Control Type:PWM; Switching Frequency:1.2MHz ;RoHS Compliant: Yes |
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