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| http://www.belling.com.cn - 1- 8/8/2006 total 13 pages white led pfm step-up dc-dc converter bl8532 selection guide bl8532 xx x xx outline: features: applications pin configuration package description
http://www.belling.com.cn - 2- 8/8/2006 total 13 pages bl8532 functional block diagram absolute maximum ratings: recommended operating conditions: min nom max unit * * * suggestion http://www.belling.com.cn - 3- 8/8/2006 total 13 pages bl8532 electrical characteristics: reference data symbol item test conditions min typ. max unit ifb dd2 *5 noload *6 lx lxleak leak stand-by current ceh threshold voltage cel threshold voltage om om note: 6 . http://www.belling.com.cn - 4- 8/8/2006 total 13 pages bl8532 typical applications: ( http://www.belling.com.cn - 5- 8/8/2006 total 13 pages bl8532 detailed description: iout iout v ifb 1 2 1 ifb v vout r r selection of the external components: http://www.belling.com.cn - 6- 8/8/2006 total 13 pages bl8532 vout vin vout d 1 inductor selection f r d d l l 2 ) 1( min 2 lf vin d i lf dvin r d vin ax l 2 ) 1( im 2 2 ) 1( d r r load l 2 capacitor selection cf r d vout vout r load http://www.belling.com.cn - 7- 8/8/2006 total 13 pages bl8532 vout r ax r r esr im ' 3 diode selection 4 input capacitor 5 resistor r1 r2 for output voltage detect 1 2 1 r r v vout ifb 2 )1 ( r v vout ifb 6 selection of l c and compensation capacitor c1 vout vout i c l vout l 2 2 http://www.belling.com.cn - 8- 8/8/2006 total 13 pages bl8532 test circuits: http://www.belling.com.cn - 9- 8/8/2006 total 13 pages bl8532 http://www.belling.com.cn - 10- 8/8/2006 total 13 pages bl8532 http://www.belling.com.cn - 11- 8/8/2006 total 13 pages bl8532 typical characteristic: bl8532-20psn output current vs. input voltage bl8532-20psn efficiency vs. input voltage(iout=100m a) bl8532-20psn efficiency vs. input voltage(iout=200m a) bl8532-20psn efficiency vs. input voltage(iout=300m a) bl8532-20psn ripple voltage vs. input voltage(iout= 100ma) input voltage (v) bl8532-20psn ripple voltage vs. input voltage(iout= 200ma) bl8532-20psn ripple voltage vs. input voltage(iout= 300ma) http://www.belling.com.cn - 12- 8/8/2006 total 13 pages bl8532 package description: http://www.belling.com.cn - 13- 8/8/2006 total 13 pages bl8532 |
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