TL H 7889
LM1391
Phase-Locked
Loop
February 1995
LM1391 Phase-Locked Loop
General Description
The LM1391 integrated circuit has been designed primarily
for use in the horizontal section of TV receivers but may
find use in other low frequency signal processing applica-
tions It includes a stable VCO linear pulse phase detector
and variable duty cycle output driver
Features
Y
Internal active regulator for improved supply rejection
Y
Uncommitted collector of output transistor
Y
Output transistor with low saturation and high voltage
swing
Y
APC of the oscillator with a synchronizing signal
Y
DC controlled output duty cycle
Y
g
300 Hz typical pull-in
Y
Linear balanced phase detector
Y
Low thermal frequency drift
Y
Small static phase error
Y
Adjustable DC loop gain
Schematic Diagram
TL H 7889 1
( ) Pin 4 Base of Q16 (LM1391) for use with (
a
) flyback pulse
C1995 National Semiconductor Corporation
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Current
40 mA
DC
Output Voltage
40 V
DC
Output Current
30 mA
DC
Sync Input Voltage (Pin 3)
5 0 Vp-p
Flyback Input Voltage (Pin 4)
5 0 Vp-p
Power Dissipation (Package Limitation)
Plastic Package (Note 1)
1000 mW
Operating Temperature Range (Ambient)
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
Lead Temperature (Soldering 10 sec )
260 C
Electrical Characteristics
T
A
e
25 C (see test circuit all switches in position 1)
Parameter
Conditions
Min
Typ
Max
Units
Regulated Voltage (Pin 6)
I
6
e
22 mA
DC
8 0
8 6
9 2
V
DC
Supply Current (Pin 6)
20
mA
DC
Collector-Emitter Saturation Voltage
I
C1
e
20 mA
0 30
0 40
V
DC
of Output Transistor (Pin 1)
Pin 4 Voltage
2 0
V
DC
Oscillator Pull-in Range
Adjust R
H
g
300
Hz
Oscillator Hold-in Range
Adjust R
H
g
900
Hz
Static Phase Error
D
f
e
300 Hz
0 5
m
s
Free-running Frequency Supply
S1 in position 2
g
3 0
Hz V
DC
Dependance
Phase Detector Leakage (Pin 5)
All switches in position 2
g
1 0
m
A
Sync Input Voltage (Pin 3)
2 0
5 0
Vp-p
Sawtooth Input Voltage (Pin 4)
1 0
3 0
Vp-p
Maximum Oscillator Frequency
500
kHz
Note 1
For operation in ambient temperatures above 25 C the device must be derated based on a 150 C maximum junction temperature and a thermal resistance
of 120 C W junction to ambient
Typical Performance Characteristics
Time
Frequency Drift vs Warm-Up
Frequency vs Temperature
Voltage
Output Duty Cycle vs V
M
TL H 7889 3
2
Typical Applications
TL H 7889 5
FIGURE 1 TV Horizontal Processor
TL H 7889 6
FIGURE 2 General Purpose Phase-Lock Loop
(See Applications Information)
4
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