参数资料
型号: NCP1234BD100R2G
厂商: ON Semiconductor
文件页数: 17/33页
文件大小: 0K
描述: IC REG CTRLR FLYBACK PWM 7SOIC
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 108kHz
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: 带卷 (TR)
NCP1234
Oscillator with Maximum Duty Cycle and Frequency
Jittering
The NCP1234 includes an oscillator that sets the
switching frequency with an accuracy of ? 7%. Two
frequency options can be ordered: 65 kHz and 100 kHz. The
maximum duty cycle of the DRV pin is 80%, with an
accuracy of ? 7%.
In order to improve the EMI signature, the switching
frequency jitters ? 6% around its nominal value, with a
triangle ? wave shape and at a frequency of 125 Hz. This
frequency jittering is active even when the frequency is
decreased to improve the EMI in light load condition.
Clamped Driver
The supply voltage for the NCP1234 can be as high as
28 V, but most of the MOSFETs that will be connected to the
DRV pin cannot accept more than 20 V on their gate. The
driver pin is therefore clamped safely below 16 V. This
driver has a typical current capability of ? 500 mA.
VCC
Clamp
f OSC
f OSC + 6
Nominal f OSC
f OSC ? 6
8%
(125 Hz)
Figure 30. Frequency Jittering
Time
http://onsemi.com
17
DRV signal
Figure 31. Clamped Driver
DRV
相关PDF资料
PDF描述
UPM2F220MHD CAP ALUM 22UF 315V 20% RADIAL
PCF0J821MCL1GS CAP ALUM 820UF 6.3V 20% SMD
NCP1234AD65R2G IC REG CTRLR FLYBACK PWM 7SOIC
SLP122M080A3P3 CAP ALUM 1200UF 80V 20% SNAP
MC34164SN-5T1G IC SENSOR UNDERVOLTAGE 5V 5TSOP
相关代理商/技术参数
参数描述
NCP1234BD65R2G 功能描述:电流型 PWM 控制器 Fixed Freq (I) Mode For FlyBk Conv 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
NCP1236 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Fixed Frequency Current Mode Controller for Flyback Converters
NCP1236AD100R2G 功能描述:电流型 PWM 控制器 BRWN LATCH OCP OVP 100KHZ 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
NCP1236AD65R2G 功能描述:电流型 PWM 控制器 BRWN LATCH OCP OVP 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
NCP1236B65NBGEVB 制造商:ON Semiconductor 功能描述:PG - ACDC CONVERSION - Bulk