参数资料
型号: NCP1236AD100R2G
厂商: ON Semiconductor
文件页数: 16/34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)
Waits
next
V CC(on)
before
V HV(min)
V CC
V CC(on)
V CC(min)
HV
starting
time
V CC(inhibit)
current
source =
I start1
HV
current
source =
I start2
time
DRV
Figure 31. Start ? up Timing Diagram
time
For safety reasons, the start ? up current is lowered when
V CC is below V CC(inhibit) , to reduce the power dissipation in
case the V CC pin is shorted to GND (in case of V CC capacitor
failure, or external pull ? down on V CC to disable the
controller).
There are only two conditions for which the current source
doesn’t turn on when V CC reaches V CC(min) : the voltage on
HV pin is too low (below V HV(min) ), or a thermal shutdown
condition (TSD) has been detected. In all other conditions,
the HV current source will always turn on and off to maintain
V CC between V CC(min) and V CC(on) .
Brown ? out protection
When the input voltage goes below V HV(stop) , a
brown ? out condition is detected, and the controller stops.
The HV current source alternatively turns on and off to
maintain V CC between V CC(on) and V CC(min) until the input
voltage is back above V HV(start) .
http://onsemi.com
16
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