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AS3715 Datasheet(PDF) 34 Page - ams-OSRAM AG |
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AS3715 Datasheet(HTML) 34 Page - ams-OSRAM AG |
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34 / 159 page  ams Datasheet Page 33 [v1-03] 2015-Aug-10 Document Feedback AS3715 − Detailed Description – Power Management Functions Figure 35: DCDC Step-Up Converter DCDC Step-Up Converter Block Diagram: Shows the internal structure of the DCDC boost controller including external components. ov_curr Gate Driver =1 V PWM Logic HV Current Sinks Each 0.156-39.8mA Automatic feedback select (CURR 1,2,3) Optional; only requir ed if CURR3 can exceed 30V clk 1 MHz 50 0 kHz stepu p12_clkinv stpup2_on vov_curren t overshoot comp err o ta stepu p2_fb 1.25 V 0.8 V 1.25 V 0.5 V 1.4 V VSUP currX_ctrl = '10' CURR1 CURR2 CURR3 LEDs as required by th e app lication FB_SU GATE_SU SENSEN_SU SENSEP_SU RSU2 0.15 +/- 5% LSU2 10μH; SD12-100 Coiltronics DSU2 PMEG2010 QSU2 Si1304 CSU2_IN 2.2μF CSU2_OUT2 2.2μF/25V curren t sense setpu p2_v step2_prot VSUPPLY ramp |
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