- 您现在的位置：买卖IC网 > Datasheet目录996 > NCP1351LEDGEVB (ON Semiconductor)EVAL BOARD FOR NCP1351LEDG Datasheet资料下载
参数资料
| 型号： | NCP1351LEDGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/27页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP1351LEDG |
| 设计资源： | NCP1351 EVB BOM NCP1351LEDGEVB Gerber Files NCP1351LED EVB Schematic |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 700mA |
| 输出及类型： | 1，隔离 |
| 输出电压： | 33V |
| 特点： | 短路保护 |
| 输入电压： | 85 ~ 265 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1351 |
| 其它名称： | NCP1351LEDGEVBOS |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
NCP1351
V Ct
Controlled by the
FB Current
Minimum Frequency
P out
I Ct = 10 m A
Decreases
P out
Increases
Maximum Frequency
Figure 10. The Current Injected into the Feedback Loop Adjusts the Switching Frequency
C t Voltage
C t Voltage
Figure 11. In Light Load Conditions, the
Oscillator Further Delays the Restart Time
In light load conditions, the frequency can go down to a
few hundred Hz without any problem. The internal circuitry
naturally blocks the oscillator and softly shifts the restart
time as shown on Figure 11 scope shot.
Delays The Restart Time
In lack of feedback current, for instance during a startup
sequence or a short circuit, the oscillator frequency is pushed
to the limit set by the timing capacitor. In this case, the lower
threshold imposed to the timing capacitor is blocked to
500 mV (parameter V fault ). This is the maximum power the
Figure 12. C t Voltage Swing at a Moderate
Loading
power supply can deliver at low line. This discrepancy
relates to the propagation delay from the point where the
peak is detected to the MOSFET gate effective pulldown. It
naturally includes the controller reaction time, but also the
driver capability to pull the gate down. If the MOSFET Q g
is too large, then this parameter will greatly affect your
overpower parameter. Sometimes, the small PNP can help
and we recommend it if you use a large Q g MOSFET:
D1
1N4148
converter can deliver. To the opposite, as you inject current
via the optocoupler in the feedback pin, the off time expands
and the power delivery reduces. The maximum threshold
DRV
Q1
2N2907
level in standby conditions is set to 6 V.
GND
Over Power Protection
As any universal-mains operated converters, the output
power slightly increases at high line compared to what the
Figure 13. A Low-Cost PNP Improves the Drive
Capability at Turn-off
http://onsemi.com
12
相关PDF资料 |
PDF描述 |
|---|---|
| NCP3065BBGEVB | BOARD EVAL NCP3065 MR16 BOOST |
| NCP3066SCBCKGEVB | EVAL BOARD FOR NCP3066SCBCKG |
| NCP5005GEVB | EVAL BOARD FOR NCP5005G |
| NCP5006EVB | EVAL BOARD FOR NCP5006 |
| NCP5030MTTXGEVB | EVAL BOARD FOR NCP5030MTTXG |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1351PRINTGEVB | 功能描述:电源管理IC开发工具 NCP1351 40 W PRINTER EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1377 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation |
| NCP1377/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PWM Current -Mode Controller |
| NCP1377_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation |
| NCP1377_11 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation |
发布紧急采购，3分钟左右您将得到回复。