- 您现在的位置：买卖IC网 > PDF目录20432 > NCP3121QPBCKGEVB (ON Semiconductor)EVAL BOARD FOR NCP3121QPBCKG PDF资料下载
参数资料
| 型号： | NCP3121QPBCKGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 14/41页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP3121QPBCKG |
| 设计资源： | NCP3121 EVB BOM NCP3121QPBCKGEVB Gerber Files NCP3121QPBCKGEVB Schematic |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 3.3V，5V |
| 电流 - 输出： | 3A，3A |
| 输入电压： | 12V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP3121 |
| 其它名称： | NCP3121QPBCKGEVBOS |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页
NCP3121
voltage until the SS capacitor is charged/discharged to a
voltage higher than 0.8 V.
Power Good
The power good is an open drain and active high output
that indicates when the output voltage has reached 90%
(min) of the nominal output voltage. This output can be
pulled up to the appropriate level with an external resistor.
The power good comparator senses the voltage at the FB
pin, which is a function of V out .
The power good output transistor behavior is shown in the
“Typical Operating Characteristics” section. The PG pin is
held low during a soft ? start. Once a soft ? start is completed,
the PG goes high if there are no faults and no delays
associated with it.
Current Limit
The NCP3121 protects a power system if overcurrent
occurs. The NCP3121 contains pulse ? by ? pulse current
limiting to protect the power switch and external
components. The current through each channel is
continuously monitored. The current limit is set to allow
peak switch current in excess of 3.5 A (minimum). Current
limiting is implemented by monitoring the high ? side
P ? channel switch current during conduction with a current
limit comparator. When the peak of the switching current
reaches the current limit, the power switch turns off.
Hiccup Overload Protection (OLM – Over Load Mode)
Hiccup mode is a method of protecting the power supply
from damage during overload conditions. Within normal
operation, the external soft ? start capacitor is pulled up by a
current source that delivers 8.75 m A to the SS pin capacitor.
The soft ? start capacitor continues to charge until it reaches
the saturation voltage of the current source, typically V ss =
4 V. When the overload condition is detected, the soft ? start
capacitor is discharged to 0.1 V and is again charged to 1 V.
This is periodically repeated until the overload condition is
detected. The transconductance error amplifier output is tied
to ground when the soft ? start capacitor is discharged.
Figure 35. Hiccup Overload Protection
Thermal Shutdown
The NCP3121 has a thermal shutdown feature to protect
the device from overheating when the die temperature
exceeds 160 ° C (typically). If the chip temperature exceeds
the overtemperature shutdown trip point, the fault signal is
activated. This will disable the step down converter
operation, and the chip temperature will start to decrease.
When the chip temperature drops 15 ° C below the
overtemperature shutdown trip point, the fault signal is
deactivated and the step down converter operation starts
again with soft ? start. The thermal event sends the device
immediately into the OFF state. The currrent consumption
is equal 5 mA (typical) if the thermal condition is reached.
http://onsemi.com
14
相关PDF资料 |
PDF描述 |
|---|---|
| AT45DB321C-RU | IC FLASH 32MBIT 40MHZ 28SOIC |
| MIC4429BM | IC DRIVER MOSFET 6A LS 8-SOIC |
| SB550-E3/51 | DIODE SCHOTTKY 5A 50V DO-201AD |
| NCP3120QPBCKGEVB | EVAL BOARD FOR NCP3120QPBCKG |
| VF30100S-E3/45 | DIODE SCHOTTKY 30A 100V ITO220AB |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP3122MNTXG | 功能描述:直流/直流开关调节器 Dual 2.0 Switching Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3122QPBCKGEVB | 功能描述:电源管理IC开发工具 NCP3122 2A HF BUCK DB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP3123MNTXG | 功能描述:直流/直流开关调节器 Dual 3.0 A Switching Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3123MNTXG-CUT TAPE | 制造商:ON 功能描述:NCP3123 Series 13.2 V Dual 3 A Step-Down DC/DC Switching Regulator - QFN-32 |
| NCP3123QPBCKGEVB | 功能描述:电源管理IC开发工具 NCP3123 3A HF BUCK DB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。