PRELIMINARY
CM9156A
Application Evaluation Circuit
Note 1: Pull-up and current setting resistor values will vary with application.
Note ꢀ: JP1 jumper selects either Flash WLED application or WLED for LCD backlight application.
Note 3: JPꢀ jumper selects Flash signal or disables signal connected to ENA pin If JPꢀ is not jumpered, then ENA is pulled high.
Note 4: Flash WLEDs have three cathodes and one common anode.
Note 5: The SN74LS0ꢀ is configured as a one-shot pulse generator, with time controlled by R1ꢀ, R16, and C5.
Note 6: J3 jumper inserted will create a 1/60 s flash pulse (16 ms). Without J3 jumper inserted the flash pulse will be will 1/30 s (33
ms.
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
