MAX22256
新規設計に推奨Compact, 36V H-Bridge Transformer Driver for Isolated Supplies
Wide-Range Transformer Driver Simplifies Isolated Power Designs
- 製品モデル
- 6
- 1Ku当たりの価格
- 最低価格:$3.90
製品情報
- Simple, Flexible Design
- 5V to 36V Supply Range
- Up to 91% Efficiency
- Provides over 15W to Transformer
- Undervoltage Lockout
- Internal or External Clock Source
- Synchronous Clock Output (MAX22258)
- Programmable Overcurrent Threshold
- 30ns to 200ns Adjustable Deadtime (MAX22258)
- Robust Integrated System Protection
- Fault Detection and Indication
- Overcurrent Limiting up to 1A
- Overtemperature Protection
- Precision Internal Clock Source (±6%) Prevents Excessive Transformer Core Losses Due to Frequency Shift
- Wide Temperature Range: -40°C to +125°C
- Space Savings
- Small 3mm x 3mm 10-Pin TDFN Package (MAX22256A/B/C) with 0.5mm Pitch
- Small 4mm x 5mm 14-Pin TSSOP Package (MAX22258) with 0.65mm Pitch
The MAX22256/MAX22258 integrated primary-side controllers and H-bridge drivers for isolated power-supply circuits feature a precision on-board oscillator, protection circuitry, and internal MOSFETs to provide up to 650mARMS of current to the primary winding of a transformer. These devices feature an internal 450kHz (typ) oscillator and can also be driven by an external clock to synchronize multiple devices and control EMI. An internal flip-flop stage guarantees a fixed 50% duty-cycle to prevent DC current flow in the transformer as long as the clock period is constant.
The MAX22256/MAX22258 operate from a wide single-supply voltage range from 5V to 36V and include undervoltage lockout for controlled startup. Break-before-make switching is integrated to prevent cross-conduction of the H-bridge MOSFETs. A resistor-adjustable overcurrent limit allows primary-side limiting of load currents on the transformer’s secondary side and thermal shutdown circuitry provides additional protection against excessive power dissipation.
The MAX22256A features a 30ns (typ) dead time for conventional H-bridge switching topologies. The MAX22256B/C feature a fixed dead time of 60ns (typ) and 100ns (typ), respectively, and are optimized for the zero-voltage switching of an LLC topology. The MAX22258 features a resistor-programmable dead time and a synchronized clock output (CLKO).
Applications
- Isolated Motor Drive Gate Power Supply
- Isolated +24V PLC Field Supply
ドキュメント
データシート 1
| 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 |
|---|---|---|---|
| MAX22256AATB+ | LFCSP | ||
| MAX22256AATB+T | LFCSP | ||
| MAX22256BATB+ | LFCSP | ||
| MAX22256BATB+T | LFCSP | ||
| MAX22256CATB+ | LFCSP | ||
| MAX22256CATB+T | LFCSP |
| 製品モデル | 製品ライフサイクル | PCN |
|---|---|---|
|
4 27, 2024 - 2400 ASSEMBLY |
||
| MAX22256AATB+ | 製造中 | |
| MAX22256AATB+T | 製造中 | |
| MAX22256BATB+ | 製造中 | |
| MAX22256CATB+ | 製造中 | |
これは最新改訂バージョンのデータシートです。