Typical operating characteristics (continued) – Rainbow Electronics MAX5971А User Manual
Page 10
10 _____________________________________________________________________________________
MAX5971A
Single-Port, 40W, IEEE 802.3af/802.3at PSE
Controller with Integrated MOSFET
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
LED PWM TIMING AND DUTY CYCLE
MAX5971A toc24
10µs/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 DISABLED
MAX5971A 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
MAX5971A 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
MAX5971A 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
MAX5971A 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
MAX5971A toc21
100ms/div
0V
0mA
V
AGND
- V
OUT
20V/div
I
OUT
100mA/div