ML4805
PIN CONFIGURATION
ML4805
18-Pin PDIP (P18)
18-Pin SOIC (S18)
IEAO
IAC
ISENSE
VRMS
SS
VDC
RTCT
RAMP 1
RAMP 2
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
VEAO
VFB
VREF
VCC
PFC OUT
PWM OUT
PGND
AGND
ILIM
TOP VIEW
PIN DESCRIPTION
PIN
NAME
FUNCTION
PIN
NAME
FUNCTION
1
2
3
4
5
6
7
8
IEAO
I
AC
I
SENSE
V
RMS
SS
V
DC
R
T
C
T
RAMP 1
PFC transconductance current error
amplifier output
PFC gain control reference input
9
10
11
RAMP 2
ILIM
AGND
PGND
PWM ramp sense input
PWM current limit sense input
Analog ground
Power ground
Current sense input to the PFC current
limit comparator
Input for PFC RMS line voltage
compensation
Connection point for the PWM soft start
capacitor
PWM voltage feedback input
12
13
14
15
16
PWM OUT PWM driver output
PFC OUT
V
CC
V
REF
V
FB
VEAO
PFC driver output
Positive supply (connected to an
internal shunt regulator).
Buffered output for the internal 7.5V
reference
PFC transconductance voltage error
amplifier input
PFC transconductance voltage error
amplifier output
Connection for oscillator frequency
setting components
17
PFC ramp input
18
2