参数资料
型号: NCP1236AD100R2G
厂商: ON Semiconductor
文件页数: 18/34页
文件大小: 0K
描述: IC CTLR CURR MODE 100KHZ 7-SOIC
标准包装: 1
输出隔离: 隔离
频率范围: 92kHz ~ 108kHz
输入电压: 10.5 V ~ 28 V
输出电压: 28V
工作温度: -40°C ~ 125°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)7 引线
供应商设备封装: 7-SOIC
包装: 标准包装
其它名称: NCP1236AD100R2GOSDKR
NCP1236
V HV
V HV(start)
V HV(stop)
Starts at next
Brown-out
time
DRV
V CC(ON)
t HV
Figure 33. AC Input Brown ? out Timing Diagram
time
Oscillator with Maximum Duty Cycle and Frequency
Jittering
The NCP1236 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 NCP1236 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 34. Frequency Jittering
Time
http://onsemi.com
18
DRV signal
Figure 35. Clamped Driver
DRV
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