AAT3177 Datasheet, PDF (14/16 Pages) Advanced Analogic Technologies – High Current, High Efficiency Charge Pump with Auto-Timer

ChargePump^TM
PRODUCT DATASHEET
AAT3177
High Current, High Efficiency Charge Pump with Auto-Timer
Button(s) Pushed^{1, 2}
DATA
MOVIE+DATA
FLASH
MOVIE
DATA+FLASH+MOVIE
Description
Increments through the 16 data settings. Hold down to auto-cycle.
Decrement the data setting. Hold down to auto-cycle.
Generate a flash pulse. Current level determined by the DATA setting (defaults to DATA 1). Trim-pot
VR4 sets timeout duration. Flash will not time out for low current settings (DATA=5-16).
Toggle on/off movie mode illumination. Current level determined by the DATA setting. Leave on to see
effects of changing DATA. Movie mode will time out for high current settings (DATA=1-4).
Reset, shutdown.
Table 5: Evaluation Board User Interface.
Figure 5: AAT3177 Evaluation Board
Top Side Layout.
Figure 6: AAT3177 Evaluation Board
Bottom Side Layout.
1. The ‘+’ sign indicates that these buttons are all pressed and released together.
2. Flash timeout duration is adjustable from 10ms to 2 seconds. Rotate trim pot VR4 clockwise to reduce the duration. When the timeout duration determined by the value of CT
is set to be less than the VR4 setting, it will supersede.
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3177.2008.06.1.0