UC3844BD1R2G
Current Mode PWM Controller 1A 500kHz 8-Pin SOIC N T/R
数量 | 単価(USD) | 合計金額 |
---|---|---|
1 | $0.508 | $0.51 |
10 | $0.423 | $4.23 |
30 | $0.381 | $11.43 |
100 | $0.340 | $34.00 |
500 | $0.286 | $143.00 |
1000 | $0.275 | $275.00 |
在庫:9,237
- 90日間のアフター保証
- 365日の品質保証
- 正規品保証
- 7*24時間サービス検疫
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部品番号 : UC3844BD1R2G
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パッケージ/ケース : 8-SOIC(0.154",3.90mmWidth)
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ブランド : onsemi
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コンポーネントのカテゴリ : DC DC Switching Controllers
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日付シート : UC3844BD1R2G データシート (PDF)
概要 UC3844BD1R2G
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%.
These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.
The UCX844B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX845B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
主な特長
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz Output Switching Frequency
- Output Deadtime Adjustable from 50% to 70%
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-By-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Pb-Free Packages are Available
仕様
以下は、選択された部品の特性やカテゴリーに関する基本的なパラメータである。
Product Status | Active | Output Type | Transistor Driver |
Function | Step-Up, Step-Up/Step-Down | Output Configuration | Positive, Isolation Capable |
Topology | Boost, Flyback | Number of Outputs | 1 |
Output Phases | 1 | Voltage - Supply (Vcc/Vdd) | 10V ~ 36V |
Frequency - Switching | Up to 500kHz | Duty Cycle (Max) | 48% |
Synchronous Rectifier | No | Clock Sync | No |
Control Features | Frequency Control | Operating Temperature | 0°C ~ 70°C (TA) |
Mounting Type | Surface Mount | Package / Case | 8-SOIC (0.154", 3.90mm Width) |
Supplier Device Package | 8-SOIC | Base Product Number | UC3844 |
保証と返品
保証、返品、および追加情報
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QAと返品ポリシー
部品の品質保証: 365 日
返品・返金:90日以内
返品・交換:90日以内
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配送と梱包
配送: たとえば、FedEx、SF、UPS、または DHL.UPS、または DHL。
部品のパッケージング保証: 100% ESD 帯電防止保護を特徴とする当社のパッケージングには、高い靭性と優れた緩衝機能が組み込まれています。
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