参数资料
型号: NCP1237BD65R2G
厂商: ON Semiconductor
文件页数: 26/41页
文件大小: 0K
描述: IC REG CTRLR FLYBACK PWM 7SOIC
标准包装: 1
PWM 型: 电流模式
输出数: 1
频率 - 最大: 70kHz
占空比: 85%
电源电压: 9.5 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)7 引线
包装: 标准包装
其它名称: NCP1237BD65R2GOSDKR
NCP1237
I OPC
V HV
V FB(fold)
V FB(OPC)
V FB
Figure 54. Overpower Compensation Current Relation to Feedback Voltage and Input Voltage
A peak detector continuously senses the ac input, and its
output is periodically sampled and reset, in order to follow
closely the input voltage variations. The sample and reset
events are controlled by the brown-out comparator when the
HV pin is connected to the AC line input (as shown in Figure
55). In the case the HV pin is connected to the DC-link
capacitor, its voltage never crosses the brown-out threshold,
and the watchdog timer t WD is used to generate the sampling
and reset events (Figure 56). Note that depending on the
relative speeds at which the HV and VCC voltages appear at
start-up, the correct overpower compensation current may
be delayed by one cycle.
V HV
BO threshold
time
Peak
detector
Reset
Reset
Reset
Reset
t wd
Reset
time
I OPC
Sample
Sample
Sample
Sample
Reset
time
Figure 55. Overpower Compensation Current with the HV pin connected to an ac voltage
http://onsemi.com
26
相关PDF资料
PDF描述
NCP1238AD65R2G IC REG CTRLR FLYBACK PWM 7SOIC
NCP3011DTBR2G IC REG CTRLR BUCK PWM VM 14TSSOP
RPP50-483.3S CONV DC/DC 50W 36-75VIN 3.3VOUT
RPP40-2424DW CONV DC/DC 40W 9-36V +/-24VOUT
RPP40-2415DW-F CONV DC/DC 40W 9-36V +/-15VOUT
相关代理商/技术参数
参数描述
NCP1237PRINTGEVB 功能描述:电源管理IC开发工具 32W, 32V PRINTER ADAPTER 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
NCP1238 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Fixed Frequency Current Mode Controller for Flyback Converters
NCP1238AD65R2G 功能描述:电流型 PWM 控制器 DSS LATCH SOCP 65KHZ RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
NCP1238BD65R2G 功能描述:电流型 PWM 控制器 DSS AUTOR SOCP 65KHZ RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
NCP1239 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Low−Standby High Performance PWM Controller