Typical operating characteristics – Rainbow Electronics MAX5953D User Manual
Page 7
MAX5953A/MAX5953B/MAX5953C/MAX5953D
IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
_______________________________________________________________________________________
7
DETECTION CURRENT
vs. INPUT VOLTAGE
MAX5953A/B/C/D toc01
INPUT VOLTAGE (V)
DETECTION CURRENT (mA)
8
6
4
2
0.1
0.2
0.3
0.4
0.5
0
0
10
R
DISC
= 25.5k
Ω
I
IN
+ I
RDISC
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
MAX5953A/B/C/D toc02
INPUT VOLTAGE (V)
CLASSIFICATION CURRENT (mA)
25
20
15
10
5
5
10
15
20
25
30
35
40
45
50
0
0
30
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
EFFECTIVE DIFFERENTIAL INPUT
RESISTANCE vs. INPUT CURRENT
MAX5953A/B/C/D toc03
INPUT VOLTAGE (V)
EFFECTIVE DIFFERENTIAL INPUT RESISTANCE (M
Ω
)
8
6
4
2
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
0
10
INPUT OFFSET CURRENT
vs. INPUT VOLTAGE
MAX5953A/B/C/D toc04
INPUT VOLTAGE (V)
INPUT OFFSET CURRENT (
µ
A)
8
6
2
4
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
-4.0
0
10
NORMALIZED UVLO
vs. TEMPERATURE
MAX5953A/B/C/D toc05
TEMPERATURE (
°C)
NORMALIZED UVLO
100
75
50
25
0.992
0.994
0.996
0.998
1.000
1.002
1.004
1.006
1.008
1.010
0.990
0
125
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
MAX5953A/B/C/D toc06
I
SINK
(mA)
V
PGOOD
(mV)
15
10
5
50
100
150
200
250
0
0
20
OUT LEAKAGE CURRENT
vs. TEMPERATURE
MAX5953A/B/C/D toc07
TEMPERATURE (
°C)
OUT LEAKAGE CURRENT (nA)
100
75
50
25
1
10
100
1000
0.1
0
125
V
OUT
= 48V
INRUSH CURRENT CONTROL
(V
IN
= 48V)
MAX5953A/B/C/D toc08
4ms/div
V
OUT
TO
V
EE
50V/div
V
GATE
5V/div
0V
0V
0A
0V
I
INRUSH
100mA/div
PGOOD
50V/div
DCUVLO THRESHOLD
vs. TEMPERATURE
MAX5953A/B/C/D toc09
TEMPERATURE (
°C)
V
DCUVLO
(V)
100
75
50
25
1.2750
1.2775
1.2800
1.2825
1.2725
0
125
DCUVLO RISING
Typical Operating Characteristics
(V
IN
= (V+ - V
EE
) = 48V, GATE = PGOOD = unconnected, GND connected to OUT, HVIN connected to V+, UVLO = V
EE
, C
INBIAS
= 1µF,
C
REGOUT
= 2.2µF, R
RTCT
= 25k
Ω, C
RTCT
= 100pF, C
BST
= 0.22µF, T
J
= 0°C to +125°C, unless otherwise noted. Typical values are
at T
J
= +25°C. All voltages are referenced to V
EE
, unless otherwise noted.)