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CAT3616HV4 Datasheet(PDF) 9 Page - Catalyst Semiconductor |
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CAT3616HV4 Datasheet(HTML) 9 Page - Catalyst Semiconductor |
9 / 14 page © 2006 Catalyst Semiconductor, Inc. 9 Doc. No. 5018 Rev. A Characteristics subject to change without notice BLOCK DIAGRAM Figure 2. CAT3616 Functional Block Diagram BASIC OPERATION At power-up, the CAT3616 starts operating in 1x mode where the output will be approximately equal to the input supply voltage (less any internal voltage losses). If the output voltage is sufficient to regulate all LED currents the device remains in 1x operating mode. If the input voltage is insufficient or falls to a level where the regulated currents cannot be maintained, the device automatically switches (after 400µs) into 1.5x mode. In 1.5x mode, the output is approximately equal to 1.5 times the input supply voltage (less any internal voltage losses). The above sequence is repeated each and every time the chip is powered-up or is taken out of shutdown mode (via EN pin). CAT3616 |
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