Datasheet

MAX5942A/MAX5942B
IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
______________________________________________________________________________________ 15
HIGH-
VOLTAGE
REGULATOR
IN
EN
OUT
BIAS
WINDING
REGULATOR
IN
EN
OUT
SLOPE
COMPENSATION
26mV/µs
275kHz
OSCILLATOR
70ns
BLANKING
R
S
Q
80%/50%
DUTY CYCLE
CLAMP
ILIM
BUF
UVLO
V-
FB
V+
V
DD
SS_SHDN
PWM
V
DD-OK
V
CC
NDRV
CS
V
CC
4µA
3R
50kΩ
R
5kΩ
2.4V
6.6V
0.7V
125mV
0.25V
26mV/µs
1MΩ
MAX5942A ONLY
∑
ERROR
AMP
V
CC
Figure 4. MAX5942A/MAX5942B PWM Controller Functional Diagram