MAX253
製造中1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies
- 製品モデル
- 14
- 1Ku当たりの価格
- 最低価格:$2.22
製品情報
- Simple Power-Supply Transformer Driver Design for Isolated RS-485/RS-232 Data-Interface Applications
- Single 5V or 3.3V Supply
- Low-Current Shutdown Mode: 0.4µA
- Pin-Selectable Frequency: 350kHz or 200kHz
- 8-Pin DIP, SO, and µMAX® Packages Take Minimal Board Space
The MAX253 monolithic oscillator/power-driver is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.
The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.
The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.
Applications
- Bridge Ground Differentials
- High Noise-Immunity Communications Interface
- Isolated and/or High-Voltage Power Supplies
- Isolated RS-485/RS-232 Power Supply
- Medical Equipment
- Process Control
- Transformer Driver
ドキュメント
データシート 1
信頼性データ 1
デザイン・ノート 4
技術記事 5
| 製品モデル | ピン/パッケージ図 | 資料 | CADシンボル、フットプリント、および3Dモデル |
|---|---|---|---|
| MAX253CPA+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| MAX253CSA+ | Small-Outline IC, Narrow (0.15in) | ||
| MAX253CSA+T | Small-Outline IC, Narrow (0.15in) | ||
| MAX253CUA+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX253CUA+T | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX253EPA+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| MAX253ESA+ | Small-Outline IC, Narrow (0.15in) | ||
| MAX253ESA+T | Small-Outline IC, Narrow (0.15in) | ||
| MAX253ESA/V+ | Small-Outline IC, Narrow (0.15in) | ||
| MAX253ESA/V+T | Small-Outline IC, Narrow (0.15in) | ||
| MAX253EUA+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX253EUA+T | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX253MJA | Ceramic Dual-In-Line, Narrow (0.3in) | ||
| MAX253MSA/PR+ | Small-Outline IC, Narrow (0.15in) |
| 製品モデル | 製品ライフサイクル | PCN |
|---|---|---|
|
1 14, 2019 - 1702D ASSEMBLY |
||
| MAX253CSA+ | 製造中 | |
| MAX253CSA+T | 製造中 | |
|
5 1, 2020 - 1753R ASSEMBLY |
||
| MAX253CUA+ | 製造中 | |
| MAX253CUA+T | 製造中 | |
|
8 28, 2018 - 1702A ASSEMBLY |
||
| MAX253ESA+ | 製造中 | |
| MAX253ESA+T | 製造中 | |
|
9 19, 2018 - 1753N ASSEMBLY |
||
| MAX253EUA+ | 製造中 | |
| MAX253EUA+T | 製造中 | |
|
10 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX253MSA/PR+ | 製造中 | |
これは最新改訂バージョンのデータシートです。