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 Internal active regulator for improved supply rejection Uncommitted collector of output transistor Y Y 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. LM1391 Phase-Locked Loop February 1995 Absolute Maximum Ratings Flyback Input Voltage (Pin 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Current 40 mADC Output Voltage Output Current Sync Input Voltage (Pin 3) 40 VDC 30 mADC 5.0 Vp-p 5.0 Vp-p Power Dissipation (Package Limitation) Plastic Package (Note 1) Operating Temperature Range (Ambient) Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 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, all switches in position 1) Parameter Regulated Voltage (Pin 6) Conditions I6 e 22 mADC Min Typ Max 8.0 8.6 9.2 Supply Current (Pin 6) Collector-Emitter Saturation Voltage of Output Transistor (Pin 1) 20 IC1 e 20 mA 0.30 Pin 4 Voltage Units VDC mADC 0.40 VDC 2.0 VDC Oscillator Pull-in Range Adjust RH g 300 Hz Oscillator Hold-in Range Adjust RH g 900 Hz Static Phase Error Df e 300 Hz 0.5 ms Free-running Frequency Supply Dependance S1 in position 2 g 3.0 Hz/VDC Phase Detector Leakage (Pin 5) All switches in position 2 g 1.0 mA 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 Frequency Drift vs Warm-Up Time Frequency vs Temperature Output Duty Cycle vs VM Voltage TL/H/7889 – 3 2 Application Information DC Loop Gain 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 RX2 CC mb 1 a 2q RY Hz fnn j 4RXCC 1 Hz 1.5k s RO k 51k 0.6 ROCO R204 j 10 RO fO j C203 e C204 j mb j 3.2 c 10b5 ROfO Hz/rad Noise Bandwidth Damping Factor Kj 1 F 600 fO(Hz) 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 LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Europe Fax: (a49) 0-180-530 85 86 Email: cnjwge @ tevm2.nsc.com Deutsch Tel: (a49) 0-180-530 85 85 English Tel: (a49) 0-180-532 78 32 Fran3ais Tel: (a49) 0-180-532 93 58 Italiano Tel: (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductor Japan Ltd. Tel: 81-043-299-2309 Fax: 81-043-299-2408 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.