UC3175BQP [ETC]
Servo Motor Controller/Driver ; 伺服电机控制器/驱动器\n
| 型号： | UC3175BQP |
| 厂家： | 
ETC |
| 描述： | Servo Motor Controller/Driver
|
| 文件： | 总6页 (文件大小：369K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC3175B
Full-Bridge Power Amplifier
FEATURES
DESCRIPTION
•
•
•
•
•
Precision Current Control
This full-bridge power amplifier is rated for continuous output current of 0.8 Am-
peres and is intended for use in demanding servo applications such as head
positioning for high-density disk drives. The device includes a precision current
sense amplifier that provides accurate control of load current. Current is
sensed with a single resistor in series with the load. The power amplifier has a
very low output saturation voltage and will operate down to 4V supply levels.
Power output stage protection includes current limiting and thermal shutdown.
±
800mA Load Current
1.25V Total VSAT at 800mA
Controlled Velocity Head Parking
Precision Dual Supply Monitor
with Indicator
Auxiliary functions on this device include a dual-input under-voltage compara-
tor, which can monitor two independent supply voltages and force a built-in
head park function when either is below minimum. When activated by either the
UV comparator, or a command at the separate PARK input, the park circuitry
will override the amplifier inputs to convert the power outputs to a programma-
ble constant voltage source which will hold regulation as the supply voltage
falls to below 3.0 Volts. Added features include a POWER OK flag output, a
LIMIT input to force the drive output to its maximum level in either polarity, and
a over-riding INHIBIT input to disable all amplifiers and reduce quiescent sup-
ply current.
•
Limit Input to Force Output
Extremes
•
•
Inhibit Input and UVLO
4V to 15V operation
This device is packaged in a power PLCC surface mount configuration which
maintains a standard 28-pin outline, but with 7 pins along one edge allocated to
ground for optimum thermal transfer. And is also available in a 24-pin surface
mount SOIC package.
BLOCK DIAGRAM
Note: Pin numbers refer to PLCC package.
UDG-92054-1
10/94
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UC3175B
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage, (+VIN,+VC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
UV Comparator, and Digital Inputs
Note 1: Unless otherwise indicated, voltages are
referenced to ground and currents are positive
into, negative out of, the specified terminals.
"Pulsed" is defined as a less than 10% duty cycle
pulse with a maximum duration of 500µs.
Note 2: See Unitrode Integrated Circuits databook
for information regarding thermal specifications
and limitations of packages.
Maximum forced voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 10V
Maximum forced current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
C/S Inputs
Maximum forced voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 20V
A and B Amplifier Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +VIN
Open Collector Output Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
A and B Output Currents (continuous)
±
Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0A
Parking Drive Output Current
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mA
Pulsed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Output Diode Current (pulsed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Power OK Output Current(continuous) . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . -55°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Thermal Data
QP Package:
Thermal Resistance Junction to Leads,
θJL . . . . . . . . . . . . . . . . . . . . . . . 15°C/W
Thermal Resistance Junction to Ambient,
θJA . . . . . . . . . . . . . . . . . . . . . . . 40°C/W
CONNECTION DIAGRAMS
PACKAGE PIN FUNCTION
SOIC-24 (Top View)
DW Package
PLCC-28 (Top View)
QP Package
FUNCTION
PIN
1
2
+VIN
INH
UV2
UV1
Limit
3
4
5
Park Volts
C/S-
6
7
A+/REF Input
A- In
8
9
A Output
A Cur Sen
10
11
Gnd (Heat Dissipation Pins) 12-18
B Cur Sen
B Output
+VC Supply
B- In
B+ In
C/S+
Pwr OK
Park
Park Drive
C/S Out
19
20
21
22
23
24
25
26
27
28
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated specifications apply for 0°C ≤ TA ≤ 70°C, +VIN = 12V, +VC
= +VIN, A+/REF Input = 6V. TA=TJ.
PARAMETER
INPUT SUPPLY
TEST CONDITIONS
MIN
TYP
MAX UNITS
+VIN Supply Current
All Amplifier Outputs = 6V
35
1
42
mA
mA
V
+VC Supply Current
IOUT = 0A
+VIN UVLO Threshold
UVLO Threshold Hysteresis
Low to High
2.8
200
3.0
mV
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UC3175B
Unless otherwise stated specifications apply for 0°C ≤ TA ≤ 70°C, +VIN = 12V, +VC = +VIN,
A+/REF INPUT = 6V. TA=TJ.
ELECTRICAL
CHARACTERISTICS (cont.)
PARAMETER
UNDER VOLTAGE (UV) COMPARATOR
Input Bias Current
TEST CONDITIONS
MIN
TYP
MAX UNITS
-1.5
1.48
15
-0.5
1.50
25
µA
UV Thresholds
Low to High, Other Input = 5V
1.52
40
V
mV
V
UV Threshold Hysteresis
Pwr OK VSAT
IOUT = 5mA
VOUT = 20V
0.45
5
Pwr OK Leakage
µA
POWER AMPLIFIERS A and B
Input Offset Voltage
VCM = 6V, A Amplifier
8
mV
mV
B Amplifier
12
25
Input Offset Drift
Note 1, A Amplifier Only
VCM = 6V, except A+/REF Input
VCM = 6V, B Amplifier Only
(A+/Ref–C/S+)/12k, TJ = 25°C
1V ≤ VCM ≤ 10V
µV/°C
nA
Input Bias Current
Input Offset Current
Input Bias Current at A+/Ref Input
CMRR
-500
-150
200
105
nA
60
70
70
84
90
90
µA/V
dB
PSRR
+VIN = 4V to 15V, VCM = 1.5V
VOUT = 1V, Sinking 500mA to VOUT = 11V,
Sourcing 500mA
dB
Large Signal Voltage Gain
3.0
15.0
1
V/mV
V/µs
MHz
MHz
A
Slew Rate
1 to 13V, 13 to 1V, TJ = 25°C
Note 1, A Amplifier
2.1
Unity Gain Bandwidth
2
Note 1, B Amplifier
1
High-Side Current Limit
0.8
1.0
0.7
0.85
0.3
0.4
1.0
1.25
1.0
1.0
Output Saturation Voltage
High-Side, ISOURCE = 250mA
High-Side, ISOURCE = 800mA
Low-Side, ISINK = 250mA
Low-Side, ISINK = 800mA
Total, IOUT = 250mA
V
V
V
V
1.2
1.6
V
Total, IOUT = 800mA
V
High Side Diode VF
Low Side Diode VF
ID = 800mA, Inhibit Activated
ID = 800mA, Inhibit Activated
V
V
CURRENT SENSE AMPLIFIER
Input Offset Voltage
VCM = 6V
2.0
mV
Input Offset Change with Common Mode 0V ≤ VCM ≤ 12V
Input
1500 µV/V
Input Offset Drift
Note 1
8
µV/°C
Voltage Gain
-1.0V ≤ VDIFF ≤ +1.0V, VCM = 6V
Low-Side, ISINK = 1.5mA
1.95
2.00
0.3
2.05
0.5
0.7
V
V
V
Output Saturation Voltage
High-Side, ISOURCE = 1.5mA
0.4
Maximum A+/Ref Input
Volts Below +VIN, C/S+ & C/S- = BOUTPUT Max @
10mA Output Current, +VIN = 4.5V, C/S VIO ≤ 5mV
2.6
3.0
V
PARKING FUNCTION
Park Input Threshold
0.7
1.1
60
1.7
100
0.5
V
Park Input Current
Park Input = 1.7V
ISINK = 100mA
VOUT = 20V
µA
V
Park Drive Saturation Voltage, PDVSAT
Parking Drive Leakage
0.3
100
µA
nA
Amplifier A Aux Input Bias Current
-500
-150
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UC3175B
Unless otherwise stated specifications apply for 0°C ≤ TA ≤ 70°C, +VIN = 12V, +VC = +VIN,
A+/REF Input = 6V. TA=TJ.
ELECTRICAL
CHARACTERISTICS (cont.)
PARAMETER
PARKING FUNCTIONS (cont.)
Amplifier A Saturation Voltage, AHVSAT
Regulating Voltage at Park Volts
Minimum Parking Supply Voltage
AUXILIARY FUNCTIONS
Limit Input Low Voltage
TEST CONDITIONS
MIN
1.47
0.7
TYP
MAX UNITS
ISOURCE = 50mA, +VIN = 3V
0.65
1.50
1.7
0.8
1.53
1.9
V
V
V
AHVSAT + PDVSAT ≤ 1.3V @ 50mA
A Output Forced Low
A Output Forced High
0.8
2.2
V
V
Limit Input High Voltage
2.3
1.8
Limit Inactive
1.2
V
Limit Open Circuit Voltage
Limit Input Resistance
1.45
1.50
10
1.55
V
1.2V ≤ Limit Input ≤ 1.8V
kΩ
V
Inhibit Input Threshold
0.7
1.1
400
2
1.7
700
6
Inhibit Input Current
Inhibit Input = 1.7V
µA
mA
°C
Supply Current when Inhibited
Thermal Shutdown Temperature
The sum of +VIN and +VC currents
165
Note 1: This specification not tested in production.
UC3175B Series Current Sensing
UDG-92058
IL
VS
Rfb
Rfa • 2 • RS
GO =
=
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UC3175B
Parking Function
UDG-92059
1.5V • R1 + R2
R2 − (IL • RP)
Notes: Parking voltage =
RP is optional for current limiting.
Inhibit and Park Inputs are active high.
Pwr OK is low on power failure.
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3460
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