UNITRODE UC1633, UC2633, UC3633 Technical data

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UNITRODE UC1633, UC2633, UC3633 Technical data

UC1633

UC1633

UC2633

UC3633

Phase Locked Frequency Controller

FEATURES

Precision Phase Locked Frequency Control System

Crystal Oscillator

Programmable Reference Frequency Dividers

Phase Detector with Absolute Frequency Steering

Digital Lock Indicator

Double Edge Option on the Frequency Feedback Sensing Amplifier

Two High Current Op-Amps

5V Reference Output

BLOCK DIAGRAM

DESCRIPTION

The UC1633 family of integrated circuits was designed for use in phase locked frequency control loops. While optimized for precision speed control of DC motors, these devices are universal enough for most applications that require phase locked control. A precise reference frequency can be generated using the device’s high frequency oscillator and programmable frequency dividers. The oscillator operates using a broad range of crystals, or, can function as a buffer stage to an external frequency source.

The phase detector on these integrated circuits compares the reference frequency with a frequency/phase feedback signal. In the case of a motor, feedback is obtained at a hall output of other speed detection device. This signal is buffered by a sense ampilfier that squares up the signal as it goes into the digital phase detector. The phase detector responds proportionally to the phase error between the reference and the sense amplifier output. This phase detector includes absolute frequency steering to provide maximum drive signals when any frequency error exists. This feature allows optimum start-up and lock times to be realized.

Two op-amps are included that can be configured to provide necessary loop filtering. The outputs of the op-amps will source or sink in excess of 16mA, so they can provide a low impedence control signal to driving circuits.

Additional features include a double edge option on the sense amplifier that can be used to double the loop reference frequency for increased loop bandwidths. A digital lock signal is provided that indicates when there is zero frequency error, and a 5V reference output allows DC operating levels to be accurately set.

4/97

1

ABSOLUTE MAXIMUM RATINGS

Input Supply Voltage (+VIN) . . . . . . . . . . . . . . . . . . . . . . . . +20V Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . . -30mA Op-Amp Output Currents . . . . . . . . . . . . . . . . . . . . . . . . ±30mA Op-Amp Input Voltages . . . . . . . . . . . . . . . . . . . . . -.3V to +20V Phase Detector Output Current . . . . . . . . . . . . . . . . . . . ±10mA Lock Indicator Output Current . . . . . . . . . . . . . . . . . . . . +15mA Lock Indicator Output Voltage . . . . . . . . . . . . . . . . . . . . . . +20V Divide Select Input Voltages . . . . . . . . . . . . . . . . . -.3V to +10V Double Edge Disable Input Voltage . . . . . . . . . . . . -.3V to +10V Oscillator Input Voltage . . . . . . . . . . . . . . . . . . . . . . -.3V to +5V Sense Amplifier Input Voltage . . . . . . . . . . . . . . . . .3V to +20V Power Dissipation at TA = 25°C (Note 2 . . . . . . . . . . . 1000mW Power dissipation at TC = 25°C (Note 2) . . . . . . . . . . . 2000mW Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C Storage Temperature . . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C

DIL-16 (TOP VIEW)

J or N Package

UC1633

UC2633

UC3633

Note1: Voltages are referenced to ground, (Pin 16). Currents are positive into, negative out of, the specified terminals.

Note 2: Consult Packaging Section of Databook for thermal limitations and considerations of package.

CONNECTION DIAGRAMS

PLCC-20 (TOP VIEW)

PACKAGE PIN FUNCTION

Q Package

FUNCTION

PIN

 

N/C

1

 

Div 4/5 Input

2

 

Div 2/4/8 Input

3

 

Lock Indicator Output

4

 

Phase Detector Output

5

 

N/C

6

 

Dbl Edge Disable Input

7

 

Sense Amp Input

8

 

5V Ref Output

9

 

Loop Amp Inv Input

10

 

N/C

11

 

Loop Amp Output

12

 

Aux Amp Non-Inv Input

13

 

Aux Amp Inv Input

14

 

Aux Amp Output

15

 

N/C

16

 

+VIN

17

 

OSC Output

18

 

OSC Input

19

 

Ground

20

ELECTRICAL CHARACTERISTICS: (Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the

 

 

UC3633, -25°C to +85°C for the UC2633, -55°C to +125°C for the UC1633, +V IN =

 

12V; TA=TJ.)

 

 

 

 

 

 

 

 

 

 

 

 

PARAMETER

 

TEST CONDITIONS

MIN.

TYP.

MAX.

UNITS

Supply Current

 

+VIN = 15V

 

20

28

 

mA

Reference

 

 

 

 

 

 

 

Output Voltage (VREF)

 

 

4.75

5.0

5.25

 

V

Load Regulation

 

IOUT = 0V to 7mA

 

5.0

20

 

mV

Line Regulation

 

+VIN = 8V to 15V

 

2.0

20

 

mV

Short Circuit Current

 

VOUT = 0V

12

30

 

 

mA

Oscillator

 

 

 

 

 

 

 

DC Voltage Gain

 

Oscillator Input to Oscillator Output

12

16

20

 

dB

Input DC Level (VIB)

 

Oscillator Input Pin Open, TJ = 25°C

1.15

1.3

1.45

 

V

Input Impedance (Note 3)

 

VIN = VIB ±0.5V, TJ = 25°C

1.3

1.6

1.9

 

kΩ

Output DC Level

 

Oscillator Input Pin Open, TJ = 25°C

1.2

1.4

1.6

 

V

Maximum Operating Frequency

 

 

10

 

 

 

MHz

Dividers

 

 

 

 

 

 

 

Maximum Input Frequency

 

Input = 1VPP at Oscillator Input

10

 

 

 

MHz

Div. 4/5 Input Current

 

Input = 5V (Div. by 4)

 

150

500

 

μA

 

 

Input = 0V (Div. by 5)

-5.0

0.0

5.0

 

μA

Div. 4/5 Threshold

 

 

0.5

1.6

2.2

 

V

Note 3: These impedence levels will vary with TJ at about 1700ppm/°C

2

UC1633

UC2633

UC3633

ELECTRICAL

(Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the UC3633,

 

CHARACTERISTICS (cont.): -25°C to +85°C for the UC2633, -55°C to +125°C for the UC1633, +V IN = 12V; TA=TJ.)

 

 

 

 

 

 

 

 

PARAMETER

 

TEST CONDITIONS

MIN.

TYP.

MAX.

UNITS

Dividers (cont.)

 

 

 

 

 

 

 

Div. 2/4/8 Input Current

 

Input = 5V (Div. by 8)

 

150

500

 

μA

 

 

Input = 0V (Div. by 2)

-500

-150

 

 

μA

Div. 2/4/8 Open Circuit Voltage

 

Input Current = 0μA (Div. by 4)

1.5

2.5

3.5

 

V

Div. by 2 Threshold

 

 

0.20

0.8

 

 

V

Div. by 4 Threshold

 

 

1.5

 

3.5

 

V

Div. by 8 Threshold

 

Volts Below VREF

0.20

0.8

 

 

V

Sense Amplifier

 

 

 

 

 

 

 

Threshold Voltage

 

Percent of VREF

27

30

33

 

%

Threshold Hysteresis

 

 

 

10

 

 

mV

Input Bias Current

 

Input = 1.5V

-1.0

-0.2

 

 

μA

Double Edge Disable Input

 

 

 

 

 

 

 

Input Current

 

Input = 5V (Disabled)

 

150

500

 

μA

 

 

Input = 0V (Enabled)

-5.0

0.0

5.0

 

μA

Threshold Voltage

 

 

0.5

1.6

2.2

 

v

Phase Detector

 

 

 

 

 

 

 

High Output Level

 

Positive Phase/Freq. Error, Volts Below VREF

 

0.2

0.5

 

V

Low Output Level

 

Negative Phase/Freq. Error

 

0.2

0.5

 

V

Mid Output Level

 

Zero Phase/Freq. Error, Percent of VREF

47

50

53

 

%

High Level Maximum Source Current

VOUT = 4.3V

2.0

8.0

 

 

mA

Low Level Maximum Sink Current

 

VOUT = 0.7V

2.0

5.0

 

 

mA

Mid Level Output Impedance (Note 3)

IOUT = -200 to +200μA, TJ = 25°C

4.5

6.0

7.5

 

k Ω

Lock Indicator Output

 

 

 

 

 

 

 

Saturation Voltage

 

Freq. Error, IOUT = 5mA

 

0.3

0.45

 

V

Leakage Current

 

Zero Freq. Error, VOUT = 15V

 

0.1

1.0

 

μA

Loop Amplifier

 

 

 

 

 

 

 

NON INV. Reference Voltage

 

Percent of VREF

47

50

53

 

%

Input Bias Current

 

Input = 2.5V

-0.8

-0.2

 

 

μA

AVOL

 

 

60

75

 

 

dB

PSRR

 

+VIN = 8V to 15V

70

100

 

 

dB

Short Circuit Current

 

Source, VOUT = 0V

16

35

 

 

mA

 

 

Sink, VOUT = 5V

16

30

 

 

mA

Auxiliary Op-Amp

 

 

 

 

 

 

 

Input Offset Voltage

 

VCM = 2.5V

 

 

8

 

mV

Input Bias Current

 

VCM = 2.5V

-0.8

-0.2

 

 

μA

Input Offset Current

 

VCM = 2.5V

 

.01

0.1

 

μA

AVOL

 

 

70

120

 

 

dB

PSRR

 

+VIN = 8V to 15V

70

100

 

 

dB

CMRR

 

VCM = 0V to 10V

70

100

 

 

dB

Short Circuit Current

 

Source, VOUT = 0V

16

35

 

 

mA

 

 

Sink, VOUT = 5V

16

30

 

 

mA

Note 3: These impedence levels will vary with TJ at about 1700ppm/°C

3

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