UC3879
- Programmable Output Turn On Delay; Zero Delay Available
- Compatible with Voltage Mode or Current Mode Topologies
- Practical Operation at Switching Frequencies to 300 kHz
- 10-MHz Error Amplifier
- Pin Programmable Undervoltage Lockout
- Low Startup Current — 150 µA
- Soft Start Control
- Outputs Active Low During UVLO
The UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency performance. The UC3879 can be configured to provide control in either voltage mode or current mode operation, with overcurrent shutdown for fast fault protection.
Independently programmable time delays provide dead-time at the turn-on of each output stage, allowing time for each resonant switching interval.
With the oscillator capable of operating in excess of 600 kHz, overall output switching frequencies to 300 kHz are practical. In addition to the standard free running mode, with the CLKSYNC pin, the user may configure the UC3879 to accept an external clock synchronization signal. Alternatively, up to three units can be locked together with the operational frequency determined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protection. Additional features include a 10-MHz error amplifier, a 5-V precision reference, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q and 28 pin L packages.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | Phase Shift Resonant Controller datasheet (Rev. B) | 2006年 12月 13日 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Application note | Phase Shifted Full Bridge, Zero Voltage Transition Design Considerations (Rev. A) | 2011年 1月 22日 | ||
| Application note | Current Doubler Rectifier Offers Ripple Current Cancellation | 2004年 9月 21日 | ||
| Application note | Synchronous Rectifiers of a Current Doubler | 2003年 2月 27日 | ||
| Application note | A Comparison Between the BiCMOS UCC3895 Phase Shift Controller and the UC3875 | 2001年 2月 22日 | ||
| Application note | DN-63 The Current-Doubler Rectifier: An Alternative Rectification Technique | 2001年 1月 12日 | ||
| Application note | U-154 The New UC3879 Phase-Shifted PWM Controller Simplifies the Design | 1999年 9月 5日 |
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)。
UCC3895EVM-001 — UCC3895 評估模組
The UCC3895EVM-001 is an isolated 48V input phase shifted full bridge converter providing an output of 3.3V at 15A. Using the AB outputs of the UCC3895, a novel technique for direct control driven synchronous rectification is demonstrated.
| 封裝 | 引腳 | 下載 |
|---|---|---|
| PDIP (N) | 20 | 檢視選項 |
| SOIC (DW) | 20 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點