LX1555MY Microsemi Analog Mixed Signal Group, LX1555MY Datasheet - Page 6
LX1555MY
Manufacturer Part Number
LX1555MY
Description
IC PWM CURRENT MODE 8.4V 8DIP
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet
1.LX1554CM.pdf
(18 pages)
Specifications of LX1555MY
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
48%
Voltage - Supply
11 V ~ 25 V
Buck
Yes
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-55°C ~ 125°C
Package / Case
8-DIP
Frequency-max
500kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
LX1552/3/4/5
6
FIGURE 1. — OSCILLATOR FREQUENCY vs. TIMING RESISTOR
FIGURE 3. — OSCILLATOR DISCHARGE CURRENT vs.
1000
8.50
8.40
8.30
8.20
8.10
8.00
7.90
7.80
7.70
100
0.1
10
1
-75
0.1
C
V
T
C
T
A
CC
T
= 6.8nF
= 25°C
-50
= 22nF
= 15V
TEMPERATURE
(T
A
C
) Ambient Temperature - (°C)
(R
-25
T
= 47nF
T
) Timing Resistor - (k )
1
C
0
T
= 0.1µF
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
25
U
LTRA
P
50
-L
R O D U C T I O N
10
OW
C H A R A C T E R I S T I C C U R V E S
C
V
V
T
C
CC
PIN4
75
= 1nF
S
T
= 3.3nF
= 15V
TART
= 2V
100
-U
P
100
125
C
URRENT
D
, C
A T A
URRENT
FIGURE 2. — MAXIMUM DUTY CYCLE vs. TIMING RESISTOR
FIGURE 4. — OSCILLATOR FREQUENCY vs. TEMPERATURE
100
90
80
70
60
50
40
30
20
10
55
54
53
52
51
50
49
48
47
46
45
S
0
-M
-75
0.1
H E E T
ODE
-50
PWM
(T
A
(R
) Ambient Temperature - (°C)
-25
T
) Timing Resistor - (k )
1
0
25
50
10
V
R
C
75
V
T
T
CC
T
A
= 10k
CC
= 3.3nF
= 25°C
= 15V
= 15V
100
Copyright © 1994
Rev. 1.0b
100
125