MC1391P [MOTOROLA]

TV HORIZONTAL PROCESSOR; 电视的卧式处理器


型号：	MC1391P
厂家：	MOTOROLA
描述：	TV HORIZONTAL PROCESSOR 电视的卧式处理器电视
文件：	总6页 (文件大小：111K)
中文：	中文翻译
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Order this document by MC1391/D

The MC1391 provides low–level horizontal sections including phase

detector, oscillator and pre–driver. This device was designed for use in all

types of television receivers.

TV HORIZONTAL

PROCESSOR

• Internal Shunt Regulator

• Preset Hold Control Capability

• ±300 Hz Typical Pull–In

SEMICONDUCTOR

TECHNICAL DATA

• Linear Balanced Phase Detector

• Variable Output Duty Cycle for Driving Tube or Transistor

• Low Thermal Frequency Drift

• Small Static Phase Error

• Adjustable DC Loop Gain

• Positive Flyback Inputs

P SUFFIX

PLASTIC PACKAGE

CASE 626

ORDERING INFORMATION

Operating

Temperature Range

Device

Package

MC1391P

= 0° to +70°C

Plastic DIP

Figure 1. Simplified Application

nonreg

+ 30V

+150V

470

Hold

100

2.7k

High

Voltage

Tripler

3.3k

10W

12k

0.0068

µF

150k

0.005

2.4k

µF

1µF

MJ105 or Equiv

2.2k

15k

0.001

MC1391P

82k

µF

15.3:1

MRD

1140

0.01

1.5

0.1µ

5.0µF

Equiv

39k

0.2

µF

MPS–U04

or Equiv

0.003

0.1µ

µF

= 6.8 k per 100 V of flyback amplitude.

–20V Sync

This circuit has an oscillator pull–in range of

300 Hz, a noise bandwidth of 320 Hz, and a damping factor of 0.8.

Motorola, Inc. 1996

Rev 2

MOTOROLA ANALOG IC DEVICE DATA

MC1391

MAXIMUM RATINGS (T = +25°C, unless otherwise noted.)

Rating

Supply Current

Value

Unit

mAdc

Vdc

Output Voltage

Output Current

mAdc

Sync Input Voltage (Pin 3)

Flyback Input Voltage (Pin 4)

5.0

Power Dissipation (Package Limitation)

Plastic Package

625

5.0

mW/°C

Derate above T = +25°C

Operating Temperature Range (Ambient)

Storage Temperature Range

0 to +70

°C

–65 to +150

ELECTRICAL CHARACTERISTICS (T = +25°C, unless otherwise noted. See Test Circuit of Figure 2, all switches in position 1.)

Characteristics

Min

8.0

–

Typ

8.6

Max

9.4

–

Unit

Vdc

Regulated Voltage (Pin 6)

Supply Current (Pin 6)

mAdc

Vdc

Collector–Emitter Saturation Voltage (Output Transistor Q1 in Figure 6)

(I = 20 mA, Pin 1 ) Vdc

–

0.15

2.0

0.25

Voltage (Pin 4)

–

Vdc

µs

Oscillator Pull–in Range (Adjust R in Figure 2)

±300

±900

Oscillator Hold–in Range (Adjust R in Figure 2)

Static Phase Error

(∆f = 300 Hz)

–

0.5

–

Free–running Frequency Supply Dependance

(S1 in position 2)

Hz/Vdc

±3.0

Phase Detector Leakage (Pin 5)

(All switches in position 2)

µA

–

±1.0

5.0

Sync Input Voltage (Pin 3)

2.0

1.0

Sawtooth Input Voltage (Pin 4)

3.0

Figure 2. Test Circuit

0.1

3.3k

–

0.1

3.3k

µA

0.1

Pulse Generator

Sync Pulse =

+4.0V

–20 V, 5.0

µs,

39k

0.003

MC1391P

= 15.750 Hz

150k

µF

12k

Output

Pulse

+30V

3.0k

6800pF

1.0k

Pulse Generator

Output = +50 V

12 µs

2.0k

+30V (See Figure 5)

MOTOROLA ANALOG IC DEVICE DATA

MC1391

Figure 3. Frequency versus Temperature

Figure 4. Frequency Drift versus Warm–Up Time

Reference Frequency

= 15.750 Hz

–10

–20

–30

S3 in Position 2

–40

–50

–60

–70

Reference Frequency

= 15.750Hz

120

T , AMBIENT TEMPERATURE (

t, TIME (s)

Figure 5. Mark Space Ratio

4.75

4.5

= 15,750 Hz

4.25

4.0

t = 63.5 µs

3.75

3.5

3.25

3.0

2.75

POSITIVE PULSE WIDTH (

µs)

Figure 6. Representative Schematic Diagram

Oscillator

Timing

Pre–Driver

Oscillator

Regulator

Phase Detector

R22

R17

R14

330

R23

2.15

10k

3.3k

R11

3.0k

2.4k

Q18

2.6k

Phase

Detector

Output

Q14

Q13

Q11

Mark–Space

Q16

Ratio

Q7 Q8

1.2k

Q15

7.5k

R4 430

R12

820

Output

6.8k

R19

R20

Sawtooth

Input

R15

3.3k

Q10

R10

3.6k

Q12

Q17

510

R3 7.5k

R5 2.4k

R21

910

R2 6.8k

470

R13

240

Ground

Sync Input

MOTOROLA ANALOG IC DEVICE DATA

MC1391

CIRCUIT OPERATION

The MC1391P contains the oscillator, phase detector and

The phase detector is isolated from the remainder of the

circuit by R14 and Z2. The phase detector consists of the

comparator Q15, Q16 and the gated current source Q17.

Negative going sync pulses at Pin 3 turn off Q12 and the

current division between Q15 and Q16 will be determined by

the phase relationship of the sync and the sawtooth

waveform at Pin 4, which is derived from the horizontal

flyback pulse. If there is no phase difference between the

sync and sawtooth, equal currents will flow in the collectors of

Q15 and Q16 each of half the sync pulse period. The current

in Q15 is turned around by Q18 so that there is no net output

current at Pin 5 for balanced conditions. When a phase offset

occurs, current will flow either in or out of Pin 5. This pin is

connected via an external low–pass filter to Pin 7, thus

controlling the oscillator.

predriver sections needed for a television horizontal APC loop.

The oscillator is an RC type with one pin (Pin 7) used to

control the timing. The basic operation can be explained

easily. If it is assumed that Q7 is initially off, then the capacitor

connected from Pin 7 to ground will be charged by an

external resistor (R ) connected to Pin 6. As soon as the

voltage at Pin 7 exceeds the potential set at the base of Q8

by resistors R8 and R10, Q7 will turn on and Q6 will supply

base current to Q5 and Q10. Transistor Q10 will set a new,

lower potential at the base of Q8 determined by R8, R9 and

R10. At the same time, transistor Q5 will discharge the

capacitor through R4 until the base bias of Q7 falls below that

of Q8, at which time Q7 will turn off and the cycle repeats.

The sawtooth generated at the base of Q4 will appear

across R3 and turn off Q3 whenever it exceeds the bias

set on Pin 8. By adjusting the potential at Pin 8, the duty

cycle (MSR) at the predriver output pin (Pin 1) can be

changed to accommodate either tube or transistor horizontal

output stages.

Shunt regulation for the circuit is obtained with a zero

temperature coefficient from the series combination of D1,

D2 and Z1.

APPLICATION INFORMATION

–4

For a given phase detector sensitivity (µ) = 1.60 x 10 A/rad

Although it is an integrated circuit, the MC1391P has all

the flexibility of a conventional discrete component horizontal

APC loop. The internal temperature compensated voltage

regulator allows a wide supply voltage variation to be

tolerated, enabling operation from nonregulated power

supplies. A minimum value for supply current into Pin 6 to

maintain zener regulation is about 18 mA. Allowing 2.0 mA for

the external dividers

fc = µβ and β = 3.15 x R Hz/mA

Increasing R will raise the dc loop gain and reduce the static

phase error (S.P.E.) for a given frequency offset. Secondary

effects are to increase the natural resonant frequency of the

loop (ω ) and give a wider pull–in range from an out–of–lock

condition. The loop will also tend to be underdamped with fast

pull–in times, producing good airplane flutter performance.

However, as the loop becomes more underdamped impulse

noise can cause shock excitation of the loop. Unlimited

increase in the dc loop gain will also raise the noise bandwidth

excessively causing horizontal jitter with thermal noise. Once

the dc loop gain has been selected for adequate SPE

performance, the loop filter can be used to produce the balance

between other desirable characteristics. Damping of the loop is

–8.8

nonreg(min)

+ R =

–3

20 x 10

Components R , R and C are used for ripple rejection. If

the supply voltage ripple is expected to be less than 100 mV

(for a 30 V supply) then R and R can be combined and

omitted.

The output pulse width can be varied from 6.0 µs to 48 µs

achieved most directly by changing the resistor R with respect

by changing the voltage at Pin 8 (see Figure 5). However,

care should be taken to keep the lead lengths to Pin 8 as

to R which modifies the ac/dc gain ration (m) of the loop.

Lowering this ratio will reduce the pull–in range and noise

short as possible at Pin 1. The parallel impedance of R and

bandwidth (fnn). (Note: very large values of R will limit the

should be close to 1.0 kΩ to ensure stable pulse widths.

control capability of the phase detector with a corresponding

reduction in hold–in range.)

For 15 mA drive at saturation

–0.3

nonreg

–3

15 x 10

Static phasing can be adjusted simply by adding a small

resistor between the flyback pulse integrating capacitor and

ground. The sync coupling capacitor should not be too small

or it can charge during the vertical pulse and this may result in

picture bends at the top of the CRT.

The oscillator free–running frequency is set by R and C

connected to Pin 7. For values of R ≥ R

discharge

(R4 in

Figure 6), a useful approximation for the free–running

frequency is

Note: In adjusting the loop parameters, the following

equations may prove useful:

1 x χ Tω

0.6 R C

C B

χ =

Proper choice of R and C will give a wide range of

oscillator frequencies – operation at 31.5 kHz for countdown

C = 2 π fc

circuits is possible for example. As long as the product R C

C B

≈ 10 many combinations of values of R and C will satisfy

√ (1 + )T

–4

T = Ry CC

Tω

the free–running frequency requirement of 15.734 kHz.

However, the sensitivity of the oscillator (β) to control–current

from the phase detector is directly dependent on the

K =

where: K = loop damping coeffecient

magnitude of R , and this provides a convenient method of

adjusting the dc loop gain (fc).

MOTOROLA ANALOG IC DEVICE DATA

MC1391

OUTLINE DIMENSIONS

P SUFFIX

PLASTIC PACKAGE

CASE 626–05

ISSUE K

NOTES:

1. DIMENSION L TO CENTER OF LEAD WHEN

FORMED PARALLEL.

2. PACKAGE CONTOUR OPTIONAL (ROUND OR

SQUARE CORNERS).

–B–

3. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

MILLIMETERS

INCHES

DIM

MIN

9.40

6.10

3.94

0.38

1.02

MAX

10.16

6.60

4.45

0.51

1.78

MIN

MAX

0.400

0.260

0.175

0.020

0.070

0.370

0.240

0.155

0.015

0.040

–A–

NOTE 2

2.54 BSC

0.100 BSC

0.76

0.20

2.92

1.27

0.30

3.43

0.030

0.008

0.115

0.050

0.012

0.135

–T–

SEATING

PLANE

7.62 BSC

0.300 BSC

–––

0.76

1.01

–––

0.030

0.040

0.13 (0.005)

MOTOROLA ANALOG IC DEVICE DATA

MC1391

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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and

specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola

datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”

must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of

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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal

How to reach us:

USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454

JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,

3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315

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51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298

MOTOROLA ANALOG IC DEVICE DATA

MC1391/D

◊

MC1391P [MOTOROLA]

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