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参数资料
| 型号： | NCL30105GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL 80V 350 FOR LED DRV |
| 设计资源： | NCL30105GEVB Gerber Files NCL30105GEVB BOM NCL30105GEVB Schematic |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 350mA |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 60V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCL30105 |
| 其它名称： | NCL30105GEVBOS |
NCL30105
V CC
V CC(on)
V CC(off)
Internal
timer
t start(delay)
reset
reset
V DRV
V SSTART
V CS
Soft ? Start
Sequence
V SSTART(open)
V SSTART = V ILIM * I ratio
User changes
the setpoint
V ILIM
Soft ? Start
Sequence
Constant Peak
Variable Peak
Figure 22. A Typical Startup Sequence
C SSTART + SSTART
+ + 0.1 m F
I ratio
Soft ? Start Pin
The soft ? start internal section is shown in Figure 23. The
soft ? start sequence is implemented using a current source
that charges an external capacitor. The relationship between
the capacitor voltage and the peak current voltage set point
is I ratio . The maximum peak current set point is
V SSTART /I ratio . For luminosity balancing purposes, it is
possible to force the voltage on the SSTART pin from an
external source. When forcing V SSTART with an external
source, the current into the SSTART pin must be limited to
ensure that the maximum current rating is not exceeded. It
is recommended to set V SSTART by connecting a diode as
shown in Figure 23. Using this configuration, the SSTART
capacitor value to set a 15 ms soft ? start duration (t SSTART )
is calculated using Equation 1:
(eq. 1)
I @ t SSTART 20 m @ 15 m
3
http://onsemi.com
12
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