MAX5971BETI+ Maxim Integrated Products, MAX5971BETI+ Datasheet - Page 12

• Manufacturer Part Number: MAX5971BETI+
• Description: Hot Swap & Power Distribution IEEE 802.3af/at PSE Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX5971BETI+

• Lead Free Status / Rohs Status: Details

Single-Port, 40W, IEEE 802.3af/at,
PSE Controller with I
12
1, 2, 3
_____________________________________________________________________________________
PIN
4
5
6
7
8
MIDSPAN
PWMEN
NAME
ILIM1
ILIM2
SDA
V
EE
Analog Low-Side Supply Input. Bypass with an external 100V, 47FF capacitor in parallel with a
100V, 0.1FF ceramic capacitor between AGND and V
Class 5 Current-Limit Digital Adjust 1. Referenced to V
supply. Use ILIM1 with ILIM2 to enable Class 5 operation and to adjust the Class 5 current-limit
value. See the Electrical Characteristics table and Table 3 in the Class 5 PD Classification section
for details.
Class 5 Current-Limit Digital Adjust 2. Referenced to V
supply. Use ILIM2 with ILIM1 to enable Class 5 operation and to adjust the Class 5 current-limit
value. See the Electrical Characteristics table and Table 3 in the Class 5 PD Classification section
for details.
PWM Control Logic Input. Referenced to V
ply. Leave unconnected to enable the internal PWM to drive the LED pin. Force low to disable the
internal PWM.
Detection Collision Avoidance Logic Input. Referenced to V
to the digital supply. Leave unconnected to activate the detection collision avoidance circuitry
for midspan PSE systems. Force low to disable this function for an end-point PSE system. The
MIDSPAN logic level latches after the device is powered up or after a reset condition.
2-Wire Serial Interface Input/Output Data Line. Referenced to V
face is not used.
*CONNECT TO V
TOP VIEW
OUTP
N.C.
N.C.
OUT
OUT
N.C.
DET
EE
.
22
23
24
25
26
27
28
21
1
+
2
20
2
C
THIN QFN
19
MAX5971B
3
18
4
17
5
*EP
16
6
EE
FUNCTION
. PWMEN is internally pulled up to the digital sup-
15
7
14
13
12
11
10
9
8
EE
EN
LEGACY
V
AD0
INT
SCL
SDA
EE
EE
EE_DIG
.
. ILIM1 is internally pulled up to the digital
. ILIM2 is internally pulled up to the digital
EE
. MIDSPAN is internally pulled up
EE
. Connect to V
Pin Configuration
Pin Description
EE
if the I
2
C inter-