TL432
- Reference voltage tolerance at 25°C
- 0.5% (B grade)
- 1% (A grade)
- 2% (Standard grade)
- Adjustable output voltage: Vref to 36V
- Operation from −40°C to 125°C
- Typical temperature drift (TL43xB)
- 6mV (C temp)
- 14mV (I temp, Q temp)
- Low Output Noise
- 0.2Ω Typical output impedance
- Sink-current capability: 1mA to 100mA
The TL431 and TL432 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V, with two external resistors. These devices have a typical output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as on-board regulation, adjustable power supplies, and switching power supplies. The TL432 device has exactly the same functionality and electrical specifications as the TL431 device, but has different pinouts for the DBV, DBZ, and PK packages.
Both the TL431 and TL432 devices are offered in three grades, with initial tolerances (at 25°C) of 0.5%, 1%, and 2%, for the B, A, and standard grade, respectively. In addition, low output drift versus temperature verifies good stability over the entire temperature range.
The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devices are characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.
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 | TL431, TL432 Precision Programmable Reference datasheet (Rev. S) | PDF | HTML | 2024/5/31 | ||
| 應用說明 | Precision Current Sources and Sinks Using Voltage References (Rev. A) | PDF | HTML | 2026/4/15 | |||
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| 應用說明 | Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) | 2019/12/11 | ||||
| 選擇指南 | 431 Device Nomenclature (Rev. B) | 2019/9/18 | ||||
| 應用說明 | Designing With the Improved TL431LI (Rev. A) | 2019/6/28 | ||||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 | ||||
| 技術文章 | Designing for isolated DC/DC converter shunt safety | PDF | HTML | 2015/8/29 | |||
| 應用說明 | Understanding stability boundary conditions charts in TL431, TL432 Data sheet (Rev. A) | 2014/1/16 | ||||
| 應用說明 | Setting the shunt voltage on an adjustable shunt regulator | 2011/9/1 | ||||
| 更多文件說明 | SLL Precision Reference Product Clip | 2006/2/23 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
TL431 Family Unencrypted PSpice Transient and AC Model (Rev. B)
SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator
TL431CALC — TL431 Design Calculator
The TL431CALC spreadsheet calculates all component parameters for any desired output voltage for the TL43x, TLV43x and TL1431. The spreadsheet includes limits for each device. Resistor values are calculated to the nearest 1% value.
PMP10737 — 適用於車用系統的反向極性和過電壓保護參考設計
PMP10737 是一款使用離散式零組件提供反極性和過電壓保護的參考設計。輸入電壓範圍介於 7V 至 35V 之間，OVP 為 25V。LM74610 用於電池反接保護，其利用電荷泵驅動 N 通道 FET，為旁路電流提供電阻路徑。
PMP21697 — 適用於汽用音訊放大器的可變電壓電源轉換器 5-35-V 300-W 峰值參考設計
PMP23463 — 300W 超薄型 LLC 參考設計
此參考設計展示了單一銅層印刷電路板 (PCB) 上的半橋共振轉換器，可接受 385V 輸入並產生隔離 22.5V 輸出，最大負載為 13.5A。此設計包含 UCC256603 半橋 LLC 控制器和 UCC24612 同步整流器 (SR) 控制器，可實現 95.76% 的峰值效率。PMP23463 可在無負載時達到 < 1% 輸出漣波，在無負載至全負載瞬態期間輸出電壓偏差 < 3%。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBZ) | 3 | Ultra Librarian |
| SOT-23 (DBV) | 5 | Ultra Librarian |
| SOT-89 (PK) | 3 | Ultra Librarian |