ML4819CS Micro Linear, ML4819CS Datasheet - Page 2

• Manufacturer Part Number: ML4819CS
• Description: Power Factor and PWM Controller Combo
• Manufacturer: Micro Linear

ML4819
PIN CONFIGURATION
PIN DESCRIPTION
PIN
2
10 R
1
2
3
4
5
6
7
8
9
OVP
GM OUT
EA OUT A
INV A
I
DUTY CYCLE PWM controller duty cycle is limited
PWM B
I
I
SINE
SENSE
SENSE
T
NAME
B
A
FUNCTION
Input form the PFC current sense
transformer to the PWM comparator
(+). Current Limit occurs when this
point reaches 5V.
Input to Over-Voltage comparator.
Output of Gain Modulator. A resistor
to ground on this pin converts the
current to a voltage.
Output of error amplifier.
Inverting input to error amplifier.
Current Multiplier input.
by setting this pin to a fixed voltage.
Error voltage feedback input.
Input for Current Sense resistor for
current mode operation or for
Oscillator ramp for voltage mode
operation.
Oscillator timing resistor pin. A 5V
source across this resistor sets the
charging current for C
T
DUTY CYCLE
EA OUT A
GM OUT
I
I
PWM B
SENSE
SENSE
INV A
I
OVP
SINE
R
A
B
T
20-Pin PDIP
10
1
2
3
4
5
6
7
8
9
ML4819
TOP VIEW
PIN
11 I
12 RAMP COMP Buffered output from the Oscillator
13 GND B
14 OUT B
15 V
16 OUT A
17 GND A
18 V
19 GND
20 C
20
19
18
17
16
15
14
13
12
11
C
GND
V
PGND A
OUT A
V
OUT B
PGND B
RAMP COMP
I
LIM
LIM
NAME
T
REF
CC
CC
REF
T
FUNCTION
Cycle by cycle PWM current limit.
Exceeding 1V threshold on this pin
terminates the PWM cycle.
Ramp (C
current, 1/2 of which is sourced on
pins 9 and 11.
Return for the high current totem pole
output of the PWM controller.
PWM controller totem pole output.
Positive Supply for the IC.
PFC controller totem pole output.
Return for the high current totem pole
output of the PFC controller.
Buffered output for the 5V voltage
reference
Analog signal ground.
Timing Capacitor for the Oscillator.
T
). A resistor to ground sets a