5.15 Miscellaneous Circuits
This section describes circuits intended for micropower/battery operation. The circuits make use of the techniques discussed throughout this book but do not necessarily fall into the power-supply/battery-charger classification.
5.15.1 Simple CCFL Driver (Two Cells)
Figure 5–171 shows an LT1300 micropower DC/DC converter (see Section 5.1) connected to drive a cold-cathode fluorescent lamp (see Section 5.3). The LT1300 U1 is connected as a forward/flyback inverter, optimized for minimum parts count and for operation with two cells. When enabled, U1 charges the primary winding of T1 to 1 A and stops. Transformer T1 then flies back, producing high voltage across the secondary winding. This high voltages ionizes the ...
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