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BD1206GUL Fiches technique(PDF) 8 Page - Rohm |
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BD1206GUL Fiches technique(HTML) 8 Page - Rohm |
8 / 13 page Technical Note 8/12 BD1206GUL www.rohm.com 2010.02 - Rev.A © 2010 ROHM Co., Ltd. All rights reserved. (6) Power sequence EN signal must be released after VBAT voltage enough rise up. Prohibit the VBAT rise up during EN=”H”. VBAT EN Fig.8 Power sequence (7) PWM control PWM control by the external terminal (PWMIN) is possible. It becomes PWM operation, which used LED current by a register setup as the base and is the best for the brightness compensation by external control.If the application with is not use PWM, PWMIN pin must be short to VBAT. Fig.9 External PWM input solution It is possible to make it a PWMIN input before EN/LED* is “H”. A PWM drive becomes effective after the time of LED current standup. When rising during PWM operation, as for the standup time of VOUT, only the rate of PWM Duty becomes late. Appearance may be influenced when extremely late frequency and extremely low Duty are inputted. Please secure over 120 μs “H” sections at the time of PWM pulse Force. EN/LED* is an internal enable signal PWMIN LED Current L Compulsion OFF H Normal operation EN /L ED * VO U T PW M IN in p u t LE D C u rrent In te rn a l S o ft-S ta rt T im e N on-P W M PW M IN in p u t L E D Cu rre n t |
Numéro de pièce similaire - BD1206GUL |
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Description similaire - BD1206GUL |
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