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TB62752AFUG Fiches technique(PDF) 4 Page - Marktech Corporate

No de pièce TB62752AFUG
Description  Step Up Type DC/DC Converter for White LED
Download  6 Pages
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Fabricant  MARKTECH [Marktech Corporate]
Site Internet  http://www.marktechopto.com
Logo MARKTECH - Marktech Corporate

TB62752AFUG Fiches technique(HTML) 4 Page - Marktech Corporate

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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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