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YB7000 Datasheet, PDF (1/1 Pages) YOBON TECHNOLOGIES,INC. – Photoflash Capacitor Charger with Automatic Refresh | |||
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YB7000
Photoflash Capacitor Charger with Automatic Refresh
Description
YB7000 charge high voltage photoflash
capacitors quickly and efficiently. Designed
for use in digital and film cameras, these
devices use flyback topology to achieve
efficiencies up to four times better than
competing flash modules. A unique peak
inductor current control mechanism maintains
current-limited mode transformer operation
throughout the entire charge cycle, eliminating
the high inrush current often found in modules.
YB7000 output voltage sensing scheme
monitors the flyback voltage to directly regulate
the output voltage. This feature allows the
capacitor to be held at a fully charged state
without excessive power consumption.
Adjustable refresh time is fully controllable by
the user with a resistor. The DONE pin signals
that the capacitor is full charged.
Features
 Charge Any Size Photoflash Capacitor
 Support Operation from Two AA Cells or
Any Supply from 1.8V to 16V
 Use Standard transformers
 No High Voltage Zener Diode Required
 Built in 40V output switch
 Adjustable Output Voltage
 Adjustable Peak Switch Current
 Automatic Refresh with adjustable timer
 Charge Complete Indicator
 Small 8-Lead MSOP Packages
Applications
 Digital Camera Flash unit
 Film Camera Flash Unit
 High Voltage Power Supplies
 Photoflash module for cell phone
Typical Application Circuit
Figure 1jTypical Application Circuit
YB7000 MRev.0.3
www.yobon.com.tw
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