参数资料
| 型号： | NCP1015ST65T3G |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/22页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT SMPS CM SOT223 |
| 标准包装： | 4,000 |
| 输出隔离： | 隔离 |
| 频率范围： | 59kHz ~ 71kHz |
| 输入电压： | 8.1 V ~ 10 V |
| 输出电压： | 700V |
| 功率（瓦特）： | 19W |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 带卷 (TR) |
NCP1015
V CC(off) = 8.5 V
V CC(on) = 7.5 V
Drain
+
-
+
Startup Source
+
V CC
Rlimit
D1
+
?
+
CVCC
+
CAux
Laux
Ground
Figure 17. A Detailed View of the NCP1015 with Properly Connected Auxiliary Winding
u 30 ms
Figure 18. The Burst Frequency becomes So Low that it is Difficult to
Keep an Adequate Level on the Auxiliary V CC
Lowering the Standby Power with Skip ? cycle
Skip cycle offers an efficient way to reduce the standby
power by skipping unwanted cycles at light loads. However,
the recurrent frequency in skip often enters the audible range
and a high peak current obviously generates acoustic noise
in the transformer. The noise takes its origins in the
resonance of the transformer mechanical structure which is
excited by the skipping pulses. A possible solution,
successfully implemented in the NCP1200 series, also
authorizes skip cycle but only when the power demand as
dropped below a given level. At this time, the peak current
is reduced and no noise can be heard. Figure 19 shows the
peak current evolution of the NCP1015 entering standby:
http://onsemi.com
11
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