面向电池充电应用的 120V AC 输入·200W 交错反激式

iczoom188

　　描述

　　TI 设计：TIDA-00200 为需要 ~200W 输出功率级别的电池充电应用提出了一种具有最低物料清单成本的交错反激式拓扑。在实际电子组件之外，冷却机制是总体设计成本的一大来源。该设计利用 LM5032 高电压双路交错式电流模式控制器，实现了 90% 的满载效率，同时分散了热量，大幅降低了冷却难度。通常不需要风扇;而对小型散热器的需求提供了更多的设计灵活性。

　　特性

　　• 输入：100V-120V +/- 10% 交流 50/60Hz

　　• 输出电压 21V(5 个锂离子电池)，最高 9.5 A 的充电电流

　　• 90% 效率

　　• 基于 LM5032 高电压双路交错式电流模式控制器的交错反激式拓扑

　　• 可编程线路欠压闭锁和逐周期电流限制

• 基于 TLC272 双单电源运算放大器的反馈

　　TLC272

　　双路单电源运算放大器

　　描述

　　The TLC272 and TLC277 precision dual operational amplifiers combine a wide range of input offset voltage grades with low offset voltage drift, high input impedance, low noise, and speeds approaching those of general-purpose BiFET devices.

　　These devices use Texas Instruments silicon-gate LinCMOS™ technology, which provides offset voltage stability far exceeding the stability available with conventional metal-gate processes.

　　The extremely high input impedance, low bias currents, and high slew rates make these cost-effective devices ideal for applications previously reserved for BiFET and NFET products. Four offset voltage grades are available (C-suffix and I-suffix types), ranging from the low-cost TLC272 (10 mV) to the high-precision TLC277 (500 uV). These advantages, in combination with good common-mode rejection and supply voltage rejection, make these devices a good choice for new state-of-the-art designs as well as for upgrading existing designs.

　　In general, many features associated with bipolar technology are available on LinCMOS™ operational amplifiers without the power penalties of bipolar technology. General applications such as transducer interfacing, analog calculations, amplifier blocks, active filters, and signal buffering are easily designed with the TLC272 and TLC277. The devices also exhibit low voltage single-supply operation, making them ideally suited for remote and inaccessible battery-powered applications. The common-mode input voltage range includes the negative rail.

　　A wide range of packaging options is available, including small-outline and chip carrier versions for high-density system applications.

　　The device inputs and outputs are designed to withstand –100-mA surge currents without sustaining latch-up.

　　The TLC272 and TLC277 incorporate internal ESD-protection circuits that prevent functional failures at voltages up to 2000 V as tested under MIL-STD-883C, Method 3015.2; however, care should be exercised in handling these devices as exposure to ESD may result in the degradation of the device parametric performance.

　　The C-suffix devices are characterized for operation from 0°C to 70°C. The I-suffix devices are characterized for operation from –40°C to 85°C. The M-suffix devices are characterized for operation over the full military temperature range of –55°C to 125°C.

　　特性

　　Trimmed Offset Voltage: TLC277 . . . 500 uV Max at 25°C, VDD = 5 V

　　Input Offset Voltage Drift ...Typically 0.1 uV/Month, Including the First 30 Days

　　Wide Range of Supply Voltages Over Specified Temperature Range:

　　0°C to 70°C ...3 V to 16 V

　　–40°C to 85°C ...4 V to 16 V

　　–55°C to 125°C ...4 V to 16 V

　　Single-Supply Operation

　　Common-Mode Input Voltage Range Extends Below the Negative Rail (C-Suffix, I-Suffix types)

Low Noise ...Typically 25 nV/#FormatImgID_0# Hz at f = 1 kHz

　　Output Voltage Range Includes Negative Rail

High Input impedance ...1012 #FormatImgID_1# Typ

　　ESD-Protection Circuitry

　　Small-Outline Package Option Also Available in Tape and Reel

　　Designed-In Latch-Up Immunity

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