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TB62752AFUG Datasheet(PDF) 4 Page - Marktech Corporate |
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TB62752AFUG Datasheet(HTML) 4 Page - Marktech Corporate |
4 / 6 page TB62752AFUG 2005-08-5 4 TENTATIVE Protection in LED opened condition The operation with OVD terminal is available for the protection in case LED Circuit opened. Please see the example of application circuit. If load of LED is detached, Nch MOS switching operation is disabled with detection of boost circuit voltage. Setting of external Capacitor In case not using PWM signal to SHDN terminal for brightness control, recommended values are C1 = Over 2.2 (µF), C2 = Over 1.0 (µF) In case with PWM signal to SHDN terminal for brightness control, recommended values are C1 = Over 4.7 (µF), C2=Under 0.1 (µF) to reduce fluctuation of input current and up accuracy of brightness. The recommended capacitor values depend on the Brightness Control Method. <Please see after page-8> The capacitor value must be considered for gain enough accuracy of brightness with reduction of noise from Input current changing. Setting of IO Resistance connects between RSENS pin and GND. The average current is set by this RSENS value and average current are obtained by the following equation. IF[mA] = Current Value error is within ±5%. 300[mV] RSENS [ Ω] |
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