onsemi NCP81243 双输出多相控制器
onsemi NCP81243 双输出控制器提供优化的多相降压解决方案，用于 Intel IMVP8 兼容 CPU。 NCP81243 的控制系统是基于双边脉宽调制 (PWM) 和 DCR 电流检测。 该设计可以对动态负载活动进行超快速初始响应。 在负载较低的情况下，NCP81243 可以自动频率定标，同时仍能保持卓越的瞬态性能。 通过集成差分电感器 DCR 电流感应、真正差分电压传感、输入电压前馈和自适应电压定位，NCP81243 控制器可为台式机和笔记本应用准确调节电源。 NCP81243 控制器包含五路 PWM 驱动信号。 设计人员可将 PWM 驱动信号配置成多种设置。 双高性能运算误差放大器简化环路补偿。 获得专利的动态基准进样确保了设计人员不需要在闭环瞬态响应和动态 VID 性能之间做出折衷选择。 此外， NCP81243 的专利总电流相加提供高度精确的下降和数字电流监控。
The NCP81243 controller includes five PWM drive signals. Designers can configure the PWM drive signals into multiple setups. Dual high-performance operational error amplifiers simplify loop compensation. Patented Dynamic Reference Injection ensures designers do not need to compromise between closed-loop transient response and Dynamic VID performance.
特性
- Meets the Intel® IMVP8 specification
- Current mode dual-edge modulation for fast initial response to transient loading
- Dual high-performance operational error amplifiers
- One digital soft start ramp for both rails
- Dynamic reference injection
- Accurate total summing current amplifier
- DAC with droop feed-forward injection
- Dual high impedance differential voltage and total current sense amplifiers
- Phase-to-phase dynamic current balancing
- Lossless DCR current sensing for current balancing
- Summed compensated inductor current sensing for droop
- True differential current balancing sense amplifiers for each phase
- Adaptive voltage positioning (AVP)
- 300kHz-1.4MHz switching frequency range
- Startup into pre-charged loads while avoiding false overvoltage protection (OVP)
- Pin programmable power saving phase shedding
- Vin feed forward ramp slope
- OVP and undervoltage protection (UVP)
- Overcurrent protection (OCP)
- Dual power good output with internal delays
- Lead-free, halogen-free/BFR-free, and RoHS compliant
应用
- Desktop and notebook processors
- Gaming
发布日期: 2016-05-31
| 更新日期: 2022-03-11