STEVAL-TSP005V2 STMicroelectronics

STEVAL-TSP005V2 Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant Data brief Description This document focuses on a reference design for a simple, low cost 5 V 2 A flyback converter based on the PM8800A device. The PM8800A is a highly integrated device embedding an IEEE 802.3af compliant Powered Device (PD) interface together with a PWM controller. It can be successfully used in all low power, low cost PoE applications. Features IEEE 802.3af compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 Vdc to 60 Vdc output voltage: 5 Vdc 5% Output current: 2 A Peak-to-peak output ripple: 30 mV Efficiency DC-DC full-load: > 86% Efficiency overall peak: > 84% Transient response Vout to 50% load pk-pk step: < 300m V pp V in load line case: < 0.5% May 2014 DocID026436 Rev 1 1/7 For further information contact your local STMicroelectronics sales office. www.st.com . Q %/ 73 8 %/ 73 Q Q) +7 96 % X * 5 8 . 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 62 . 9, 8 73 66 G * 73 8 73 73 X X 73 X 62 % 62 73 73 4 . 282828 9 / X 73 73 7 0(0/ 73 73 73 73 96 X *1 32 9 9 Q Q 73 5 7 Electrical diagram STEVAL-TSP005V2 1 Electrical diagram Figure 1. STEVAL-TSP005V2 demonstration board: electrical schematic 78378 & ) - 5 GD W D F M N D 0 9 G . N N 1 777 VL VVD LV DVV Q *UHH /( . 738728 1 X) 9 5 )S 9 9 X) 7 6,77/ X+ / 9 )X 9 )S )LKFLUO)D 2 *1 ) 5 ( *1 (03*3 VVDVL G G ) 9 7 + / 7 G . & )1 7 K RP G N 5 ) 9 5 5 ) - G 7 VLDVV 5 ) ) ) - 7 5 ) ) 5 5 ) B)( 6 U* 9 ) 5 ) 06 % 30 * & )Q 9 1 ) 9 % & 30 3266 ) ( G 9 , 1 6/6 B 5/, 6 , , ) G &. 6 ,, 1 / 66 ,B/55 ,,B,,, B/ B5B,//5 BB,,/ ,, /5,/,5,B 5 , /5,5B ,//5,,B ,,,B/,5B555,/B ,//B/,/,,,,,BB5,5 ) G .& 5 )B N N 767+ 767 + 5 5 N ) 9 6 671 6 ) . G . & ) LVV VLV VD VD . & D- G5 SW R FM NDZ . G 6 6 8 ,5/B, ) & SRZHU FNMD 38,17 & MDSR FNU ZH , 2/7 DocID026436 Rev 1 &K &K 5 - - &K &K 1 /) / 5 5 5 5 5H & & & & 5 Q Q 5 9 & Q) ) ) & Q 9 .9 & Q) &K 9 & & Q) 5 5 %/ 32( 5H 5H 5H / 5 60 /32( 3 5 X+ & S - & 5H 5 5 Q & & & 8 , & X) 10 X 9 X) 9 9 5 & 9 9 5 2 & . 60 5H 5 %= 627 5 6 /3 62 & & & *1 X) & & & %/ %/ - 5 X 5 & 5 X 57 57 N 9 & & & & %/ Q HH /( & *1 5 N 5 5H 5H 5 5757 5H 57 *1 *1 9) 9) 5H 8 &2 &2 & 9, &6 5 5 5 4 X) 5 &6 - 5& Q3 5& Q3* 5 5 9& 5 9& 5 &&/ * & &&/ 5 96 *1 *1 5 62 & 8 & Q & 30 5 5 5 5 Q 5 5 & 9 5 & & S) . 96 *1 5 5 62 & 5 5 &K *1 HU DQG D SD -