TI UC2634

UC1634
UC2634
UC3634
Phase Locked Frequency Controller
FEATURES
DESCRIPTION
•
Precision Phase Locked Frequency Control
System
•
Communication Logic for 2-Phase Motors
•
Disable Input for Motor Inhibit
•
Crystal Oscillator
The UC1634 series of devices is optimized to provide precision
phase locked frequency control for two phase DC brushless motors. These devices include most of the features of the general
purpose UC1633 Phase Locked Control family and also provide
the out-of-phase commutation signals required for driving two
phase brushless motors. Only an external power booster stage
is required for a complete drive and control system.
•
Programmable Reference Frequency Dividers
•
Phase Detector with Absolute Frequency
Steering
•
Digital Lock Indicator
•
Two High Current Op-Amps
•
5V Reference Output
BLOCK DIAGRAM
6/93
The two commutation outputs are open collector devices that can
sink in excess of 16mA. A disable input allows the user to simultaneously force both of these outputs to an active low state.
Double edge logic, following the sense amplifier, doubles the reference frequency at the phase detector by responding to both
edges of the input signal at Pin 7.
UC1634
UC2634
UC3634
ABSOLUTE MAXIMUM RATINGS (Note 1, 2)
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 Voltage . . . . . . . . . . . . . . . . . . -.3V to +10V
Disable Input Voltage . . . . . . . . . . . . . . . . . . . . . . . -.3V to +10V
Oscillator Input Voltage . . . . . . . . . . . . . . . . . . . . . . -.3V to +5V
Sense Amplifier Input Voltage . . . . . . . . . . . . . . . . -.3V to +20V
Driver Output Currents . . . . . . . . . . . . . . . . . . . . . . . . . . +30mA
Driver Output Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . +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
Note 1: Voltages are referenced to ground, (Pin 16, DIL Package). 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)
Q Package
PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
DIV 2/4/8
Lock Indicator Output
Phase Detector
Output
Disable Input
N/C
Driver A Output
Driver B Output
Sense Amp Output
5V Ref Output
Loop Amp Inv Input
Loop Amp Output
Buffer Amp Input
Buffer Amp Output
+VIN
N/C
OSC Output
OSC Input
Ground
DIV 4/5 Input
DIL-16, SOIC-16 (TOP VIEW)
J or N Package, DW Package
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the
UC3634, -25°C to + 85°C for the UC2634 and -55°C to +125°C for the UC1634,
+VIN = 12V. TA=TJ.
PARAMETERS
Supply Current
TEST CONDITIONS
+VIN = 15V
Reference
Output Voltage (VREF)
Load Regulation
Line Regulation
Short Circuit Current
Oscillator
DC Voltage Gain
MIN
4.75
IOUT = 0mA to 7mA
+VIN = 8V to 15V
VOUT = 0V
12
MAX UNITS
20
29
mA
5.0
5.0
5.25
20
V
mV
2.0
20
mV
30
mA
12
16
20
dB
Input DC Level (VIB)
Input Impedance (Note 3)
Oscillator In Pin Open, TJ = 25°C
VIN = VIB ± 0.5V, TJ = 25°C
1.15
1.3
1.3
1.6
1.45
1.9
V
kΩ
Output DC Level
Maximum Operating Frequency
Oscillator In Pin Open, TJ = 25°C
1.2
10
1.4
1.6
V
MHz
Input = 1VPP at Oscillator In
10
Input = 5V (Div. by 4)
Input = 0V (Div. by 5)
-5.0
Dividers
Maximum Input Frequency
Div. 4/5 Input Current
(Q Package Only, Note 4)
Oscillator In to Oscillator Out
TYP
2
MHz
150
0.0
500
5.0
µA
µA
UC1634
UC2634
UC3634
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the
UC3634, -25°C to + 85°C for the UC2634 and -55°C to +125°C for the UC1634,
+VIN = 12V. TA=TJ
PARAMETERS
Dividers (cont.)
Div. 4/5 Input Threshold
(Q Package Only, Note 4)
Div. 2/4/8 Input Current
Div. 2/4/8 Open Current Voltage
Div. by 2 Threshold
Div. by 4 Threshold
Div. by 8 Threshold
TEST CONDITIONS
MIN
TYP
0.5
1.6
2.2
V
150
500
µA
-150
2.5
0.8
3.5
µA
V
V
3.5
V
Input = 5V (Div. by 8)
MAX UNITS
Input = 0V (Div. by 2)
Input Current = 0µA (Div. by 4)
-500
1.5
0.20
Volts Below VREF
0.20
0.8
Percent of VREF
27
33
Input = 1.5V
-1.0
30
10
-0.2
%
mV
µA
0.3
0.1
0.6
5.0
V
µA
-5.0
0.5
150
0.0
1.6
500
5.0
2.2
µA
µA
V
47
2.0
2.0
4.5
0.2
0.2
50
8.0
5.0
6.0
0.5
0.5
53
7.5
V
V
%
mA
mA
kΩ
0.3
0.1
0.45
1.0
V
µA
53
1.5
V
Sense Amplifier
Threshold Voltage
Threshold Hysteresis
Input Bias Current
Two Phase Drive Outputs, A and B
Saturation Voltage
Leakage Current
Disable Input
Input Current
Threshold Voltage
Phase Detector
High Output Level
Low Output Level
Mid Output Level
High Level Maximum Source Current
Low Level Maximum Sink Current
Mid Level Output Impedance (Note 3)
Lock Indicator Output
Saturation Voltage
Leakage Current
Loop Amplifier
IOUT = 16mA
VOUT = 15V
Input = 5V (Disabled, A and B Outputs Active Low)
Input = 0V (Enabled)
Positive Phase / Freq. Error, Volts Below VREF
Negative Phase / Freq. Error
Zero Phase / Freq. Error, Percent of VREF
VOUT = 4.3V
VOUT = 0.7V
IOUT = -200 to +200µA, TJ = 25°C
Freq. Error, IOUT = 5mA
Zero Freq. Error, VOUT = 15V
N INV. Reference Voltage
Percent of VREF
47
50
Input Bias Current
AVOL
PSRR
Input = 2.5V
-0.8
60
70
-0.2
75
100
µA
dB
dB
16
16
35
30
mA
mA
-0.8
70
-0.2
100
µA
dB
Source, VOUT = 0V
70
16
100
35
dB
mA
Sink, VOUT = 5V
16
30
mA
Short Circuit Current
+VIN = 8V to 15V
Source, VOUT = 0V
Sink, VOUT = 5V
Buffer Op-Amp
Input Offset Voltage
Input Bias Current
PSRR
CMRR
Short Circuit Current
VCM = 2.5V
8
VCM = 2.5V
+VIN = 8 to 15V
VCM = 0 to 10V
%
mV
Note 3: These impedance levels will vary with TJ at about 1700ppm/°C.
Note 4: This part is also available in a 20 pin plastic leadless chip carrier, Q designator, where a divide by 4/5 select pin is available.
Consult factory for details.
3
UC1634
UC2634
UC3634
APPLICATION AND OPERATION INFORMATION (For additional information see UC1633 data sheet)
Design Example:
Precision phased locked frequency control of a 2-phase motor at 3600 RPM. Using the commutation logic on the
UC3634, a simple discrete drive scheme is possible.
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3460
4
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