参数资料
型号: NCP5680MUTXG
厂商: ON Semiconductor
文件页数: 14/27页
文件大小: 0K
描述: IC LED DRIVER WHT HI EFF 24-UQFN
产品变化通告: Product Obsolescence 30/Jun/2011
标准包装: 3,000
拓扑: 切换式电容器(充电泵)
输出数: 2
内部驱动器:
类型 - 主要: 闪灯/白光
类型 - 次要: 白色 LED
频率: 850kHz ~ 1.15MHz
电源电压: 2.7 V ~ 5.5 V
输出电压: 4.5 V ~ 5.3 V
安装类型: 表面贴装
封装/外壳: 24-UFQFN 裸露焊盘
供应商设备封装: 24-UQFN(3.5x3.5)
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
NCP5680
Finally, the charge pump can be de ? activated, upon
command from the MCU, during a transmit burst pulse
applied to the PHSEN pin: see typical schematic Figure 6.
In this case, any on going flash keeps going, but no energy
is absorbed from the battery as depicted in Figures 7 and 8.
Similarly, the burst function can be used to smooth the
input battery current as depicted in Figure 9.
R2
6
470k
4
VSD
U2
NTJD1155L
1 5
TXMSK GND
23
D1
PHOTO
R1 22k
NCP5680
PHSEN
GND
Figure 5. Typical Pre Charge and Full Charge
Sequence
Figure 7. GSM Burst during the Re ? charge of
the SuperCAP
TX Mask = 1
Figure 6. Typical Transmit Burst Mask
Figure 8. GSM Burst during a Flash and
Re ? charge Sequence
Figure 9. GSM Active during a Re ? charge Cycle
http://onsemi.com
14
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