ML4821IS MICRO-LINEAR [Micro Linear Corporation], ML4821IS Datasheet - Page 2

• Manufacturer Part Number: ML4821IS
• Description: Power Factor Controller
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

ML4821
PIN CONNECTION
PIN DESCRIPTION
2
1 (1)
2 (2)
3 (3)
4 (4)
5 (5)
6 (6)
7 (7)
8 (8)
9 (9)
PIN
NAME
I
IA OUT Output and compensation node of the
IA–
IA+
I
EA OUT Output of output voltage error
INV
V
SOFT
START
LIM
SINE
SOFT START
RMS
EA OUT
IA OUT
V
I
I
SINE
RMS
EA–
IA+
LIM
IA–
FUNCTION
Peak cycle-by-cycle current limit input
average current error amplifier
Inverting input of the average current
error amplifier
Non-Inverting input of the average
current error amplifier and output of
the gain modulator
Gain modulator input
amplifier
Inverting input to error amplifier
Input for average line voltage
compensation
Normally connected to soft start
capacitor
18-Pin DIP (P18)
1
2
3
4
5
6
7
8
9
TOP VIEW
ML4821
(Pin numbers in parentheses are for 20-pin packages)
18
17
16
15
14
13
12
11
10
GND
C
V
V
OUT
PGND
R
OVP
SYNC
T
REF
CC
T
Micro Linear
10 (12) SYNC
11 (13) OVP
12 (14) R
13 (15) PWR
14 (16) OUT
15 (17) V
16 (18) V
17 (19) C
18 (20) GND
PIN
SOFT START
EA OUT
IA OUT
V
I
NAME
N/C
GND
I
SINE
EA–
RMS
IA+
LIM
IA–
T
CC
REF
T
10
1
2
3
4
5
6
7
8
9
FUNCTION
Oscillator synchronization input
Inhibits output pulses when the
voltage at this pin exceeds 5V. Also,
when the voltage at this pin is less
than 0.7V, the IC goes into low current
shut-down mode.
Timing resistor for the oscillator
Return for the high current totem
pole output
High current totem pole output
Positive supply for the IC
Buffered output for the 5V voltage
reference
Timing capacitor for the oscillator.
Analog signal ground
20-Pin SOIC (S20)
TOP VIEW
ML4821
20
19
18
17
16
15
14
13
12
11
GND
C
V
V
OUT
PGND
R
OVP
SYNC
N/C
T
T
REF
CC