TLV431A-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: -40°C to 125°C ambient operating temperature range
- Low-voltage operation, VREF = 1.24V
- Adjustable output voltage, VO = VREF to 6V
- Reference voltage tolerances at 25°C
- 0.5% for TLV431B
- 1% for TLV431A
- Typical temperature drift
- 11mV (–40°C to 125°C)
- Low operational cathode current, 80µA typical
- 0.25Ω Typical output impedance
- See TLVH431 and TLVH432 for:
- Wider VKA (1.24V to 18V) and IK (80mA)
- Multiple pinouts for SOT-23-3 and SOT-89 packages
The TLV431 device is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to 1.24V on stand alone mode or any value between VREF (1.24V) and 6V with two external resistors (see Figure 6-2). These devices operate from a lower voltage (1.24V) than the widely used TL431 and TL1431 shunt-regulator references.
When used with an optocoupler, the TLV431 device is a voltage reference in isolated feedback circuits designed for 3V to 3.3V switching-mode power supplies. These devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TLV431x-Q1 Low-Voltage Adjustable Precision Shunt Regulator datasheet (Rev. B) | PDF | HTML | 2024/7/19 | ||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 | ||||
| Application brief | Automotive LED Lighting with Adjustable Shunt References | 2018/7/17 |
設計與開發
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SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator
PMP31342 — 使用半橋 LLC 的車用 300W µDC/DC 轉換器參考設計
此車用 μDC/DC 轉換器參考設計展示非同步半橋電感-電感-電容 (LLC) 轉換器，其中包含使用 UCC256612-Q1 的 225V 至 450V 輸入電壓範圍。輸出電壓為 48V，最大負載電流為 6.25A。此設計可在關閉前低至 196V 的電壓運作。透過使用光電模擬器 ISOM8110-Q1 實現二次側穩壓。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |