LT1158CS LINER [Linear Technology], LT1158CS Datasheet - Page 17

• Manufacturer Part Number: LT1158CS
• Description: Half Bridge N-Channel Power MOSFET Driver
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
*
0.01 F
0.01 F
LOW-DROPOUT 12V REGULATOR
ADD THESE COMPONENTS TO IMPLEMENT
f = 25kHz
30k
THE CMOS 555 IS USED AS A 25kHz TRIANGLE-WAVE
OSCILLATOR DRIVING THE LT1158 INPUT PIN. THE
D.C. LEVEL OF THE TRIANGLE WAVE IS SET BY THE
POTENTIOMETER ON THE CMOS 555 SUPPLY PIN, AND
ALLOW ADJUSTMENT OF THE LT1158 DUTY CYCLE
FROM 0 TO 100%.
510
*
3.4k
1 F
4.7k
0.1 F
2.2nF
SYNC
1 F
27k
13k
EXT
MOTOR SPEED
+
0 TO 100%
1
2
3
4
Figure 14. Potentiometer-Adjusted Open Loop Motor Speed Control with Short-Circuit Protection
1
2
3
4
5
6
7
8
CMOS
555
LT3525
4.7k
7.5k
10k
Figure 13. 90% Efficiency 24V to 5V 10A Switching Regulator
8
7
6
5
1N5231A
16
15
14
13
12
11
10
9
2.2nF
U
5.1k
10 F
10 F
330pF
1 F
1N4148
1N4148
*
95% Efficiency 24V to 12V 10A Low Dropout Switching Regulator
+
+
0.33 F
510
10k
SHUTDOWN
0.01 F
0.01 F
1k
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
BOOST DR
V
BIAS
ENABLE
FAULT
INPUT
GND
B GATE FB
+
BOOST DR
V
BIAS
ENABLE
FAULT
INPUT
GND
B GATE FB
+
L1: MAGNETICS CORE #55585-A2
LT1158
30 TURNS 14GA MAGNET WIRE
LT1158
1N4148
T GATE DR
B GATE DR
T SOURCE
T GATE FB
1N4148
T GATE DR
B GATE DR
T SOURCE
T GATE FB
SENSE
SENSE
BOOST
SENSE
SENSE
BOOST
CMOS 555: LMC555 OR TLC555
Q1, Q2: MTP35N06E
V
+
–
+
V
+
–
+
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
24
0.1 F
(2) IRFZ44
24
IRFZ44
R
S
330k
: DALE TYPE LVR-3
ULTRONIX RCS01
0.1 F
INPUT
30V MAX
SHORT-CIRCUIT
CURRENT = 15A
Q2
70 H
+
–
L1
+
Q1
0.02
10V TO 30V
+
START CURRENT
= 15A MINIMUM
+
0.007
+
500 F EA
LOW ESR
MBR340
R
1000 F
LOW ESR
S
LT1158 F14
LT1158
–
+
17
1000 F
LOW ESR
5V OR
12V
LT1158 F13
*