参数资料
型号: NCP1605FORWGEVB
厂商: ON Semiconductor
文件页数: 11/19页
文件大小: 0K
描述: EVAL BOARD FOR NCP1605FORWG
设计资源: NCP1605FORWGEVB BOM
NCP1605FORWGEVB Gerber Files
NCP1605 EVB Schematic
标准包装: 1
主要目的: AC/DC,主面和辅面,带 PFC
输出及类型: 1,隔离
输出电压: 19V
电流 - 输出: 8A
输入电压: 90 ~ 265VAC
稳压器拓扑结构: 正向转换器
频率 - 开关: 133kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: NCP1217,NCP1605
其它名称: NCP1605FORWGEVBOS
NCP1217, NCP1217A
Power P1
Power P2
Power P3
Figure 20. Output Pulses at Various Power Levels (X = 5.0 m s/div) P1 < P2 < P3
300 M
200 M
100 M
0
MAX PEAK
CURRENT
SKIP CYCLE
CURRENT LIMIT
315.40 U
882.70 U
1.450 M
2.017 M
2.585 M
Figure 21. The Skip Cycle Takes Place at Low Peak Currents which Guarantees Noise--Free Operation
Sufficient margin shall be kept between normal Pin1 level and the latchoff point in order to avoid false triggering.
Ramp Compensation
Ramp compensation is a known mean to cure
subharmonic oscillations. These oscillations take place at
half the switching frequency and occur only during
Continuous Conduction Mode (CCM) with a duty--cycle
greater than 50%. To lower the current loop gain, one usually
injects between 50 and 100% of the inductor down--slope.
Figure 22 depicts how internally the ramp is generated.
http://onsemi.com
11
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