Typical operating characteristics (continued) – Rainbow Electronics MAX5965B User Manual
Page 9
MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
_______________________________________________________________________________________
9
FOLDBACK CURRENT-LIMIT THRESHOLD
vs. OUTPUT VOLTAGE
MAX5965A toc10
V
OUT
- V
EE
(V)
V
SENSE
- V
EE
(mV)
50
40
30
20
10
50
100
150
200
250
300
0
0
FOLDBACK CURRENT-LIMIT THRESHOLD
vs. OUTPUT VOLTAGE
MAX5965A toc10A
V
OUT
- V
EE
(V)
V
SENSE
- V
EE
(mV)
50
40
30
20
10
50
100
150
200
250
300
350
400
450
500
0
0
ICUT = 001
ICUT = 001
DC LOAD DISCONNECT THRESHOLD
vs. TEMPERATURE
MAX5965A toc11
TEMPERATURE (NC)
DC LOAD DISCONNECT THRESHOLD (mV)
60
35
10
-15
3
4
5
6
2
-40
85
OVERCURRENT TIMEOUT
(R
LOAD
= 240
Ω TO 57Ω)
MAX5965A toc12
20ms/div
(AGND - V
OUT
)
50V/div
I
OUT
200mA/div
INT
5V/div
V
GATE_
10V/div
0V
0A
0V
V
EE
OVERCURRENT RESPONSE WAVEFORM
(MAX5965AUAX) (R
LOAD
= 240
Ω TO 57Ω)
MAX5965A toc13
400
μs/div
(AGND - V
OUT
)
50V/div
I
OUT
200mA/div
INT
2V/div
GATE
10V/div
0V
0A
0V
V
EE
SHORT-CIRCUIT RESPONSE TIME
MAX5965A toc14
20ms/div
(AGND - V
OUT
)
20V/div
I
OUT
200mA/div
V
GATE_
10V/div
0V
0A
V
EE
SHORT-CIRCUIT RESPONSE TIME
MAX5965A toc15
4
μs/div
(AGND - V
OUT
)
20V/div
I
OUT
10A/div
V
GATE_
10V/div
0V
130mA
V
EE
Typical Operating Characteristics (continued)
(V
EE
= -48V, V
DD
= +3.3V, V
AUTO
= V
AGND
= V
DGND
= 0V, RESET = SHD_ = unconnected, R
SENSE
= 0.5Ω, IVEE = 00, ICUT = 000,
T
A
= +25°C, all registers = default setting, unless otherwise noted.)