ML4826 Fairchild, ML4826 Datasheet - Page 2

• Manufacturer Part Number: ML4826
• Description: PFC and Dual Output PWM Controller Combo
• Manufacturer: Fairchild

ML4826
Pin Configuration
Pin Description
2
PIN
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
PFC OUT
DC I
RAMP 1
RAMP 2
I
PWM 2
PWM 1
NAME
AGND
PGND
SENSE
VEAO
V
R
IEAO
V
V
V
V
V
I
RMS
SS
T
CC2
CC1
REF
AC
DC
FB
LIMIT
C
T
PFC transconductance current error amplifier output
PFC gain control reference input
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
Connection for oscillator frequency setting components
PFC ramp input
When in current mode, this pin functions as the current sense input; when in voltage mode,
it is the PWM input from the PFC output (feedforward ramp)
PWM current limit comparator input
Analog signal ground
Return for the PWM totem-pole outputs
PWM driver 2 output
PWM drive 1 output
PFC driver output
Positive supply for the PWM drive outputs
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
DC I
RAMP 1
RAMP 2
I
SENSE
V
R
IEAO
LIMIT
RMS
V
20-Pin PDIP (P20)
T
I
SS
DC
C
AC
T
10
1
2
3
4
5
6
7
8
9
ML4826
TOP VIEW
20
19
18
17
16
15
14
13
12
11
FUNCTION
VEAO
V
V
V
V
PFC OUT
PWM 1
PWM 2
PGND
AGND
FB
REF
CC2
CC1
PRODUCT SPECIFICATION
REV. 1.0.5 2/14/02