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參數(shù)資料
| 型號： | 5962-9326102M2A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A POWER FACTOR CONTROLLER, 120 kHz SWITCHING FREQ-MAX, CQCC20 |
| 封裝： | CERAMIC, LCC-20 |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 365K |
| 代理商： | 5962-9326102M2A |
www.ti.com
Voltage Amplifier
Current Amplifier
Miscellaneous
SLUS329E – MONTH 2003 – REVISED JANUARY 2008
The UC3854A/B voltage amplifier design is essentially similar to the UC3854 with two exceptions. The first is
with the internal connection. The lower voltage reduces the amount of charge on the compensation capacitors,
which provides improved recovery form large signal events, such as line dropouts, or power interruption. It also
minimizes the dc current flowing through the feedback. The output of the voltage amplifier is also changed. In
addition to a 6.0-V temperature compensated clamp, the output short circuit current has been lowered to 2 mA
typical, and an active pull down has replaced the passive pull down of the UC3854.
The current amplifier for an average current PFC controller needs a low offset voltage in order to minimize ac line
current distortion. With this in mind, the UC3854A/B current amplifier has improved the input offset voltage from
±4 mV to 0 V to ±3 mV. The negative offset of the UC3854A/B assures that the PWM circuit will not drive the
MOSFET is the current command is zero (both current amplifier inputs zero.) Previous designs required an
external offset cancellation network to implement this key feature. The bandwidth of the current amplifier has
been improved as well to 5 MHz typical. While this is not generally an issue at 50 Hz or 60 Hz inputs, it is
essential for 400 Hz input avionics applications.
Several other important enhancements have been implemented in the UC3854A/B. AVCC supply voltage clamp at
20 V allows the controller to be current fed if desired. The lower startup supply current (250
A typical),
substantially reduces the power requirements of an offline startup resistor. The 10.5 V/10 V UVLO option
(UC3854B) enables the controller to be powered off of an auxiliary 12-V supply.
The VREF GOOD comparator assures that the MOSFET driver output remains low if the supply of the 7.5 V
reference are not yet up. This improvement eliminates the need for external Schottky diodes on the PKLMT and
Mult Out pins that some UC3854 designs require. The propagation delay of the disable feature has been
improved to 300 ns typical. This delay was proportional to the size of the VREF capacitor on the UC3854, and is
typically several orders of magnitude slower.
Copyright 2003–2008, Texas Instruments Incorporated
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參數(shù)描述 |
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| 5962-9326102MEA | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:5962-9326102MEA, PWR FACTOR PREREG - Rail/Tube |
| 5962-9326401M2C | 功能描述:電池管理 BATTERY MANAGER RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| 5962-9326401MEA | 功能描述:模擬開關(guān) IC Battery Manager RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| 5962-9326501M2A | 制造商:Texas Instruments 功能描述:LDO Cntrlr REG 2V 20-Pin LCCC Tube |
| 5962-9326501MCA | 制造商:Texas Instruments 功能描述:LDO Cntrlr REG 2V 14-Pin CDIP Tube |
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