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 applications It includes a stable VCO linear pulse phase detector and variable duty cycle output driver
Y Y Y Y Y
Features
Y Y
Y Y Y
Internal active regulator for improved supply rejection Uncommitted collector of output transistor
Output transistor with low saturation and high voltage swing APC of the oscillator with a synchronizing signal DC controlled output duty cycle g 300 Hz typical pull-in Linear balanced phase detector Low thermal frequency drift Small static phase error 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
TL H 7889
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 Output Voltage Output Current Sync Input Voltage (Pin 3) 40 mADC 40 VDC 30 mADC 5 0 Vp-p Flyback Input Voltage (Pin 4) Power Dissipation (Package Limitation) Plastic Package (Note 1) Operating Temperature Range (Ambient) Storage Temperature Range Lead Temperature (Soldering 10 sec ) 5 0 Vp-p 1000 mW 0 C to a 70 C b 65 C to a 150 C 260 C
Electrical Characteristics TA e 25 C (see test circuit
Parameter Regulated Voltage (Pin 6) Supply Current (Pin 6) Collector-Emitter Saturation Voltage of Output Transistor (Pin 1) Pin 4 Voltage Oscillator Pull-in Range Oscillator Hold-in Range Static Phase Error Free-running Frequency Supply Dependance Phase Detector Leakage (Pin 5) Sync Input Voltage (Pin 3) Sawtooth Input Voltage (Pin 4) Maximum Oscillator Frequency Adjust RH Adjust RH Df e 300 Hz S1 in position 2 All switches in position 2 IC1 e 20 mA Conditions I6 e 22 mADC
all switches in position 1) Min 80 Typ 86 20 0 30 20
g 300 g 900
Max 92
Units VDC mADC
0 40
VDC VDC Hz Hz ms Hz VDC
05
g3 0 g1 0
mA Vp-p Vp-p kHz
20 10 500
50 30
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
Frequency Drift vs Warm-Up Time Frequency vs Temperature Output Duty Cycle vs VM Voltage
TL H 7889 – 3
2
Application Information
The following equations may be considered when using the LM1391 in a particular application VCC b 8 6 R201 e R301 e X 0 02 1 Hz 1 5k s RO k 51k 0 6 ROCO R204 j 10 RO fO j C203 e C204 j 1 F 600 fO(Hz) Damping Factor Kj DC Loop Gain mb j 3 2 c 10b5 ROfO Hz rad RX2 CC mb 1 a 2q RY Hz fnn j 4RXCC Noise Bandwidth
q RX2
2 RY
CC mb
Test Circuit
TL H 7889 – 4
Connection Diagram
Dual-In-Line Package
TL H 7889 – 2
Top View Order Number LM1391N See NS Package Number N08E 3
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
Typical Applications (Continued)
TL H 7889 – 7
FIGURE 3 Variable Duty Cycle Oscillator (See Applications Information)
5
LM1391 Phase-Locked Loop
Physical Dimensions inches (millimeters)
Molded Dual-In-Line Package (N) Order Number LM1391N NS Package Number N08E
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