MAX5984 MAXIM [Maxim Integrated Products], MAX5984 Datasheet - Page 11

• Manufacturer Part Number: MAX5984
• Description: Single-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFET
• Manufacturer: MAXIM [Maxim Integrated Products]

1, 2, 3
PIN
4
5
6
Single-Port, 40W, IEEE 802.3af/802.3at PSE
(MAX5984C)
(MAX5984D)
(MAX5984A/
MAX5984B)
2-EVENT
PWMEN
LSCEN
NAME
ILIM1
ILIM2
V
______________________________________________________________________________________
EE
Analog Low-Side Supply Input. Bypass with an external 100V, 47FF capacitor in parallel with a
100V, 0.1FF ceramic capacitance 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 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 for details.
2-Event Classification Select. Referenced to V
supply. Leave unconnected to disable 2-Event classification. Force low to enable the 2-Event
classification. See the 2-Event PD Classification section for more details. Change status of this
bit only when the part is in reset state. The MAX5984C/MAX5984D are enabled.
PWM Control Logic Input. Referenced to V
Leave unconnected to enable the internal PWM to drive the LED pin. Force low to disable the
internal PWM. The MAX5984A/MAC5984B/MAX5984D are enabled.
Load Stability Check Function Select. Referenced to V EE. LSCEN is internally pulled up to the
digital supply. Leave unconnected to enable the load stability check function. Force low to disable
the load stability check function. Change status of this bit only when the part is in reset state.
The MAX5984A is disabled but the MAX5984B/MAX5984C are enabled.
Controller with Integrated MOSFET
*EXPOSED PAD, CONNECT TO AGND.
TOP VIEW
OUTP
N.C.
N.C.
OUT
OUT
N.C.
DET
22
23
24
25
26
27
28
21
1
+
20
2
THIN QFN
19
3
MAX5984
18
4
17
5
*EP
16
6
EE
FUNCTION
. PWMEN is internally pulled up to the digital supply.
EE
15
7
. 2-EVENT is internally pulled up to the digital
14
13
12
11
10
9
8
EN
LEGACY
V
I.C.
I.C.
I.C.
I.C.
EE
EE
EE_DIG
EE
. ILIM1 is internally pulled up to the digital
. ILIM2 is internally pulled up to the digital
.
Pin Configuration
Pin Description
11