Datasheet

MAX5986A–MAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
19Maxim Integrated
Typical Application Circuits (continued)
Figure 4. MAX5986B/MAX5986C 12V Output with Back Bias
MAX5986B
MAX5986C
VDRV
CLASS2
MPS
V
DD
V
CC
WAD
WK
SL
RREF
GND PGND
ULP
AUX
LX
FB
LED
L0
220µH*
C2
10µF
C1
68nF
C3
1µF
1µF
R1
215k
I
R
SL
60.4kI
0I
TO µP OPEN-DRAIN OUTPUTS
OR PULLDOWN SWITCHES
R
SIG
24.9kI
R2
24.9k
I
12V
OUTPUT
RJ-45 AND
BRIDGE
RECTIFIER
*USE 110µH FOR MAX5986C
C4
10µF