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参数资料
| 型号： | NCP1595AGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL NCP1595 SYNC CONV |
| 设计资源： | NCP1595AGEVB Schematic NCP1595AGEVB Test Procedure NCP1595AGEVB Gerber Zip NCP1595AGEVB Bill of Materials |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.8V |
| 电流 - 输出： | 1.5A |
| 输入电压： | 4 V ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1595A |
| 其它名称： | NCP1595AGEVB-ND NCP1595AGEVBOS |
NCP1595, NCP1595A, NCP1595C
PROTECTIONS
Undervoltage Lockout (UVLO)
The under voltage lockout feature prevents the controller
from switching when the input voltage is too low to power
the internal power supplies and reference. Hysteresis must
be incorporated in the UVLO comparator to prevent IxR
drops in the wiring or PCB traces from causing ON/OFF
cycling of the controller during heavy loading at power up
or power down.
Overcurrent Protection (OCP)
NCP1595/A/C detects high side switch current and then
compares to a voltage level representing the overcurrent
threshold limit. If the current through the high side FET
exceeds the overcurrent threshold limit for seven
consecutive switching cycles, overcurrent protection is
triggered.
Once the overcurrent protection occurs, hiccup mode
engages. First, hiccup mode, turns off both FETs and
discharges the internal compensation network at the output
of the OTA. Next, the IC waits typically 2 ms and then resets
the overcurrent counter. After this reset, the circuit attempts
another normal soft ? start. During soft ? start, the overcurrent
protection threshold is increased to prevent false
overcurrent detection while charging the output capacitors.
Hiccup mode reduces input supply current and power
dissipation during a short circuit. It also allows for much
improved system up ? time, allowing auto ? restart upon
removal of a temporary short ? circuit.
Power Save Mode
If the load current decreases, the converter can skip
switching and operate with reduced frequency. This
minimizes the quiescent current and maintains high
efficiency. NCP1595C disables this feature.
Pre ? Bias Startup
In some applications the controller will be required to start
switching when it’s output capacitors are charged anywhere
from slightly above 0 V to just below the regulation voltage.
This situation occurs for a number of reasons: the
converter ’s output capacitors may have residual charge on
them or the converter ’s output may be held up by a low
current standby power supply. NCP1595/A/C supports
pre ? bias start up by holding switching off until the soft ? start
ramp reaches the FB Pin voltage.
Thermal Shutdown
The NCP1595/A/C protects itself from over heating with
an internal thermal monitoring circuit. If the junction
temperature exceeds the thermal shutdown threshold both
the upper and lower MOSFETs will be shut OFF.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1595AMNR2G | 功能描述:直流/直流开关转换器 PWM BUCK CONVERTER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1595AMNTWG | 功能描述:直流/直流开关转换器 PWM BUCK CONVERTER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1595CMNTWG | 功能描述:直流/直流开关转换器 PWM CURRENT MODE 1.5A BUC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1595MNR2G | 功能描述:直流/直流开关转换器 PWM BUCK CONVERTER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1595MNT2G | 功能描述:直流/直流开关转换器 PWM BUCK CONVERTER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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