l6564主要特性:

51電子網(wǎng)公益庫(kù)存:

A1040-Y

A1042

A1042

A11D

A11F

A11G

A1202EM

A1225

A124

A1244-O

A1501E

A1502E

A1701

A1807-Y

A1834-GR

A1850

A1855

A1862

A1991

A202

A21RC

A2919SLB

■ fast “bidirectional” input voltage feedforward (1/v2 correction)

■ accurate adjustable output overvoltage protection

■ protection against feedback loop disconnection (latched shutdown)

■ inductor saturation protection

■ ac brownout detection

■ low (≤100 μa) start-up current

■ 6 ma max. operating bias current

■ 1% (@ tj = 25 ℃) internal reference voltage

■ -600/+800 ma totem pole gate driver with active pull-down during uvlo

■ ssop10 package

l6564主要應(yīng)用:

■ pfc pre-regulators for:

 high-end ac-dc adapter/charger

 desktop pc, server, web server

 iec61000-3-2 or jeita-miti compliant smps

■ smps for led luminaires

圖1.l6564方框圖

圖2.采用l6564的演示板e(cuò)vl6564-100w電路圖

50w evl6564-50wflb評(píng)估板

the evl6564-50wflb demonstration board implements a 50 w, wide-range mains input, power factor corrected, power supply suitable for all low power applications needing a high pf, such as lighting applications, led power supplies, etc. it is possible through the use of a low-cost device like the l6564 united with a simple topology like the flyback one, providing, therefore, a very competitive solution.

the main feature of this converter is that the input current is almost in phase with the mains voltage; therefore the power factor is close to unity. this is achieved by the controller, the l6564, shaping the input current as a sinewave in phase with the mains voltage.

evl6564-50wflb評(píng)估板主要特性:

■ line voltage range: 90 to 265 vac

■ minimum line frequency (fl): 47- 63 hz

■ minimum switching frequency: 44 khz

■ reflected voltage: 140 v

■ regulated output voltage: 24 v

■ rated output power: 50 w

■ power factor (load ≥ 50%): 0.9 minimum

■ minimum efficiency at full load: 88%

■ maximum 2fl output voltage ripple: 1.1 v pk-pk (vin=230 vac, pout=50 w)

■ maximum ambient temperature: 50 ℃

■ conducted emi: in acc. with en55022 class-c

■ pcb type and size: single-side, 35 μm, cem-1, 140 x 60 mm


圖3.evl6564-50wflb評(píng)估板外形圖


圖4.evl6564-50wflb評(píng)估板電路圖
evl6564-50wflb評(píng)估板材料清單(bom):



st公司的evl6564-50wflb是采用l6564的輸入電壓90-265 vac的50w pfc電源,適用于需要高pf的所有低功耗應(yīng)用如照明,led電源等,線路頻率47-63hz,開關(guān)頻率大于44khz,輸出電壓24v,負(fù)載大于50%時(shí)的功率系數(shù)大于0.9,滿負(fù)載的效率大于88%.本文介紹了l6564主要特性,方框圖,采用l6564的演示板e(cuò)vl6564-100w電路圖以及 50w的evl6564-50wflb評(píng)估板電路圖和材料清單.