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ML4821 Arkusz danych(PDF) 2 Page - Fairchild Semiconductor

Numer części ML4821
Szczegółowy opis  Power Factor Controller
Download  12 Pages
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

ML4821 Arkusz danych(HTML) 2 Page - Fairchild Semiconductor

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ML4821
PRODUCT SPECIFICATION
2
REV. 1.0.2 6/19/01
Pin Connection
Pin Description
Pin Number
Name
Function
18-Pin DIP
20-Pin SOIC
11
ILIM
Peak cycle-by-cycle current limit input
2
2
IA OUT
Output and compensation node of the average current error amplifier
33
IA–
Inverting input of the average current error amplifier
4
4
IA+
Non-Inverting input of the average current error amplifier and output of the
gain modulator
55
ISINE
Gain modulator input
6
6
EA OUT Output of output voltage error amplifier
7
7
INV
Inverting input to error amplifier
88
VRMS
Input for average line voltage compensation
9
9
SOFT
START
Normally connected to soft start capacitor
10
12
SYNC
Oscillator synchronization input
11
13
OVP
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.
12
14
RT
Timing resistor for the oscillator
13
15
PWR
GND
Return for the high current totem pole output
14
16
OUT
High current totem pole output
15
17
VCC
Positive supply for the IC
16
18
VREF
Buffered output for the 5V voltage reference
17
19
CT
Timing capacitor for the oscillator.
18
20
GND
Analog signal ground
ILIM
IA OUT
IA–
IA+
ISINE
EA OUT
EA–
VRMS
SOFT START
GND
CT
VREF
VCC
OUT
PGND
RT
OVP
SYNC
ILIM
IA OUT
IA–
IA+
ISINE
EA OUT
EA–
VRMS
SOFT START
N/C
GND
CT
VREF
VCC
OUT
PGND
RT
OVP
SYNC
N/C
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
TOP VIEW
18-Pin PDIP (P18)
20-Pin SOIC (S20)
TOP VIEW


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