安森美NCP1034 100V PWM方案

安森美(On Semi)公司的NCP1034是高压100V PWM控制器,主要用于高性能同步降压DC/DC转换器,输入电压可高达100V. NCP1034输出驱车能力2A,能驱动一对外接的N-MOSFET.开关频率从25kHz到500kHz.具有软起动和过压与欠压保护,可用在48V非绝缘的DC/DC转换器,嵌入通信系统,网络和计算电压稳压器与通用高压DC/DC转换器.本文介绍了NCP1034的主要特性, 内部方框图和典型应用电路图及其材料清单(BOM).

NCP1034:100 V Sync Buck Controller
The NCP1034 is a high voltage PWM controller designed for high performance synchronous Buck DC/DC applications with input voltages up to 100 V. The NCP1034 drives a pair of external N−MOSFETs. The switching frequency is programmable from
25 kHz up to 500 kHz allowing the flexibility to tune for efficiency and size. A synchronization feature allows the switching frequency to be set by an external source or output a synchronization signal to multiple NCP1034 controllers. The output voltage can be precisely regulated using the internally trimmed 1.25 V reference voltage for low voltage applications. Protection features include user programmable undervoltage lockout and hiccup current limit.

NCP1034主要特性:
High Voltage Operating up to 100 V
Programmable Switching Frequency up to 500 kHz
2 A Output Drive Capability
Precision Reference Voltage (1.25 V)
Programmable Soft−Start with Prebiased Load Capability
Programmable Overcurrent Protection
Programmable Undervoltage Protection
Hiccup Current Limit Using MOSFET RDS(on) Sensing
External Frequency Synchronization
16 Pin SOIC Package
This is a Pb−Free Device
NCP1034应用:
48 V Non−Isolated DC−DC Converter
Embedded Telecom Systems
Networking and Computing Voltage Regulator
Distributed Point of Load Power Architectures
General High Voltage DC−DC Converters



图1.NCP1034内部方框图



图2.NCP1034典型应用电路图
典型应用电路图材料清单(BOM):