ML4821CP 데이터 시트보기 (PDF) - Micro Linear Corporation
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ML4821CP Datasheet PDF : 12 Pages
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ML4821
PIN CONNECTION
ML4821
18-Pin DIP (P18)
ILIM
1
IA OUT
2
IA–
3
IA+
4
ISINE
5
EA OUT
6
EA–
7
VRMS
8
SOFT START
9
18
GND
17
CT
16
VREF
15
VCC
14
OUT
13
PGND
12
RT
11
OVP
10
SYNC
TOP VIEW
ILIM
IA OUT
IA–
IA+
ISINE
EA OUT
EA–
VRMS
SOFT START
N/C
ML4821
20-Pin SOIC (S20)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
TOP VIEW
GND
CT
VREF
VCC
OUT
PGND
RT
OVP
SYNC
N/C
PIN DESCRIPTION (Pin numbers in parentheses are for 20-pin packages)
PIN NAME FUNCTION
1 (1)
2 (2)
3 (3)
4 (4)
5 (5)
ILIM
Peak cycle-by-cycle current limit input
IA OUT Output and compensation node of the
average current error amplifier
IA–
Inverting input of the average current
error amplifier
IA+
Non-Inverting input of the average
current error amplifier and output of
the gain modulator
ISINE Gain modulator input
6 (6)
7 (7)
8 (8)
9 (9)
EA OUT Output of output voltage error
amplifier
INV Inverting input to error amplifier
VRMS Input for average line voltage
compensation
SOFT Normally connected to soft start
START capacitor
PIN NAME
10 (12) SYNC
11 (13) OVP
12 (14) RT
13 (15) PWR
GND
14 (16) OUT
15 (17) VCC
16 (18) VREF
17 (19) CT
18 (20) GND
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
2
Micro Linear
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