Typical operating characteristics (continued) – Rainbow Electronics MAX5971B User Manual
Page 11
______________________________________________________________________________________ 11
MAX5971B
Single-Port, 40W, IEEE 802.3af/at,
PSE Controller with I
2
C
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
LED PWM TIMING: MINIMUM DUTY
CYCLE (DEFAULT)
MAX5971B toc24a
V
AGND
- V
OUT
50V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
OV
OmA
OV
10µs/div
LED PWM TIMING: MAXIMUM DUTY
CYCLE (PROGRAMMABLE)
MAX5971B toc24b
V
AGND
- V
OUT
50V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
OV
OmA
OV
10µs/div
LED OVERCURRENT FAULT WITH PWM DISABLED
MAX5971B toc23b
200ms/div
0V
0V
0mA
V
AGND
- V
OUT
50V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
LED OVERCURRENT FAULT WITH PWM ENABLED
MAX5971B toc23a
200ms/div
0V
0V
0mA
V
AGND
- V
OUT
50V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
LED DETECTION FAULT WITH PWM DISABLED
MAX5971B toc22b
200ms/div
0V
0V
0mA
V
AGND
- V
OUT
10V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
LED DETECTION FAULT WITH PWM ENABLED
MAX5971B toc22a
200ms/div
0V
0V
0mA
V
AGND
- V
OUT
10V/div
V
AGND
- V
LED
20V/div
I
OUT
500mA/div
STARTUP USING 2-EVENT CLASSIFICATION
WITH A VALID PD
MAX5971B toc21
100ms/div
0V
0mA
V
AGND
- V
OUT
20V/div
I
OUT
100mA/div