Sanyo LB1980H Three-phase brushless motor driver for vcr capstan motor Datasheet

Ordering number : EN5974
Monolithic Digital IC
LB1980H
Three-Phase Brushless Motor Driver
for VCR Capstan Motors
Overview
Package Dimensions
The LB1980H is a 3-phase brushless motor driver that is
particularly appropriate for VCR capstan motor drivers.
unit: mm
3233-HSOP28H
Functions
[LB1980H]
· 3-phase full-wave drive
· Built-in torque ripple correction circuit (variable
correction ratio)
· Current limiter circuit
· Upper and lower side output stage over-saturation
prevention circuit that does not require external
capacitors.
· FG amplifier
· Thermal shutdown circuit
Allowable power dissipation, Pdmax — W
SANYO: HSOP28H
Independent IC
Ambient temperature, Ta — °C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3098RM (OT) No. 5974-1/8
LB1980H
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Symbol
Conditions
Ratings
Unit
VCC max
7
V
VS max
24
V
IO max
1.3
A
1.81
W
Pd max
Mounted on a 71.6 × 114.3 × 1.6 mm glass Epoxy printed
circuit board
0.77
W
Operating temperature
Topr
Independent device
–20 to + 75
°C
Storage temperature
Tstg
–55 to + 150
°C
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
VS
Supply voltage
VCC
Hall input amplitude
GSENSE pin input range
VHALL
VGSENSE
Between the Hall inputs
With respect to the control system ground
Unit
5 to 22
V
4.5 to 5.5
V
±30 to ±80
mVo-p
–0.20 to + 0.20
V
Electrical Characteristics at Ta = 25°C, VCC = 5 V, VS = 15 V
Parameter
VCC supply current
Ratings
Symbol
Conditions
ICC
RL = ∞, VCTL = 0 V, VLIM = 0 V (Quiescent)
12
18
mA
VOsat1
IO = 500 mA, Rf = 0.5 Ω, Sink + Source
VCTL = VLIM = 5 V (With saturation prevention)
2.1
2.6
V
VOsat2
IO = 1.0 A, Rf = 0.5 Ω, Sink + Source
VCTL = VLIM = 5 V (With saturation prevention)
2.6
3.5
V
1.0
mA
min
typ
Unit
max
[Outputs]
Output saturation voltage
Output leakage current
IOleak
[FR]
FR pin input threshold voltage
FR pin input bias current
VFSR
2.25
IB (FSR)
–5.0
2.50
2.75
V
µA
[Control]
VCREF
2.05
CTLREF pin input range
CTLREF pin voltage
VCREFIN
1.50
CTL pin input bias current
IB (CTL)
2.15
With VCTL = 5 V and the CTLREF pin open
2.25
V
3.50
V
4.0
µA
CTL pin control start voltage
VCTL (ST)
With Rf = 0.5 Ω, VLIM = 5 V, IO ≥ 10 mA,
Hall input logic fixed (U, V, W = H, H, L)
2.00
2.15
2.30
V
CTL pin control Gm
Gm (CTL)
With Rf = 0.5 Ω, ∆IO = 200 mA,
Hall input logic fixed (U, V, W = H, H, L)
0.46
0.58
0.70
A/V
Voff (LIM)
With Rf = 0.5 Ω, VCTL = 5 V, IO ≥ 10 mA,
Hall input logic fixed (U, V, W = H, H, L)
140
200
260
mV
IB (LIM)
With VCTL = 5 V and the VCREF pin open
–2.5
With Rf = 0.5 Ω, VCTL = 5 V, VLIM = 2.06 V,
Hall input logic fixed (U, V, W = H, H, L)
830
[Current Limiter]
LIM current limit offset voltage
LIM pin input bias current
LIM pin current control level
ILIM
µA
900
970
mA
+6
mV
1.0
3.0
µA
3.3
V
[Hall Amplifier]
Hall amplifier input offset voltage
Voff (HALL)
Hall amplifier input bias current
IB (HALL)
Hall amplifier common-mode input voltage range
VCM (HALL)
–6
1.3
[TRC]
Torque ripple correction ratio
TRC
ADJ pin voltage
VADJ
For the high and low peaks in the
Rf waveform when IO = 200 mA.
(Rf = 0.5 Ω, with the ADJ pin open)*1
9
2.37
2.50
%
2.63
V
[FG Amplifier]
FG amplifier input offset voltage
FG amplifier input bias current
FG amplifier output saturation voltage
FG amplifier voltage gain
FG amplifier common-mode input voltage
Voff (FG)
–8
IB (FG)
+8
–100
nA
Sink side, for the load provided by the
VOsat (FG)
internal pull-up resistor
VG (FG)
For the open loop state with f = 10 kHz
VGM (FG)
Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform.
2. Parameters that are indicated as design target values in the conditions column are not tested.
41.5
0.5
mV
44.5
0.5
V
47.5
dB
4.0
V
Continued on next page.
No. 5974-2/8
LB1980H
Continued from preceding page.
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
[Saturation]
The voltages between each OUT and
VOsat (DET) Rf pair when IO = 10 mA, Rf = 0.5 Ω, and
VCTL = VLIM = 5 V
Saturation prevention circuit lower
side voltage setting
0.175
0.25
0.325
V
[TSD]
TSD
Design target value*2
180
°C
∆TSD
Design target value*2
20
°C
TSD operating temperature
Hysteresis width
Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform.
2. Parameters that are indicated as design target values in the conditions column are not tested.
For each Hall logic setting
Ground level
Correction ratio =
2 × (Vp – Vb)
100 × (%)
Vp – Vb
Truth Table and Control Functions
Source → Sink
Phase V → Phase W
1
Phase W → Phase V
Phase U → Phase W
2
Phase W → Phase U
Phase U → Phase V
3
Phase V → Phase U
Phase W → Phase V
4
Phase V → Phase W
Phase W → Phase U
5
Phase U → Phase W
Phase V → Phase U
6
Phase U → Phase V
Hall input
U
V
W
H
H
L
H
H
L
L
L
L
L
L
H
H
L
H
H
H
L
FR
H
L
H
Note: In the FR column, “H” refers to a voltage of 2.75 V or higher, and “L” refers
to 2.25 V or lower (when VCC = 5 V.)
Note: In the Hall input column, “H” refers to the state in the corresponding phase
where the + input is at a potential at least 0.01 V higher than the – input,
and “L” refers to the state where the – input is at a potential at least 0.01 V
higher than the + input.
L
H
L
H
L
H
L
H
L
Note: Since the drive technique adopted is a 180° technique, phases
other than the sink and source phase do not turn off.
IOUT
IOUT
Control Function and Current Limiter Function
Slope: 0.50 A/V (typical)
Control Characteristics
Control Limiter Characteristics
No. 5974-3/8
LB1980H
Pin Descriptions
Pin No.
Pin
27
28
1
UOUT
VOUT
WOUT
Function
U phase output
V phase output
W phase output
Equivalent circuit
(Spark killer diodes are built-in.)
Output current detection. The control block current limiter
operates using the resistor Rf connected between these pins
and ground. Also, the lower side saturation prevention circuit
and the torque ripple correction circuit operate based on the
voltages across this resistor. It is especially important to note
that, since the saturation prevention level is set using this
voltage, the lower side saturation prevention circuit will
become less effective in the high current region if the value of
Rf is lowered excessively. Also, the PWR and SENSE pins
must be connected together.
4
24
Rf (SENSE)
Rf (PWR)
22
VS
5
GSENSE
6
FR
Forward/reverse selection. The voltage applied to this pin
selects the motor direction (forward or reverse).
(Vth = 2.5 V at VCC = 5 V (typical))
23
ADJ
Used for external adjustment of the torque ripple correction
ratio. Apply a voltage externally with a low-impedance circuit
to the ADJ pin to adjust the correction ratio. The correction
ratio falls as the applied voltage is increased, and increases
as the applied voltage decreases. The torque ripple
correction ratio can be modified by factors in the range 0 to 2
times the ratio that applies when his pin is left open.
(The pin voltage is set to about VCC/2 internally, and the
input impedance is about 5 kΩ.)
7
GND
Ground for all circuits other than the output transistors. The
lowest potential of the output transistors is that of the Rf pin.
8
FGIN+
Input used when the FG amplifier is used as an inverting
input. A feedback resistor must be connected between
FGOUT and this pin.
9
FGIN–
Noninverting input used when the FG amplifier is used as a
differential input amplifier. No bias is applied internally.
10
FGOUT
FG amplifier output. There is an internal resistive load.
14
FC
OUT
Lower side saturation
prevention circuit input block
Output block power supply
Ground sensing. The influence of the common ground
impedance on Rf can be excluded by connecting this pin to
nearest ground for the Rf resistor side of the motor ground
wiring that includes Rf. (This pin must not be left open.)
Speed control loop frequency characteristics correction.
Continued on next page.
No. 5974-4/8
LB1980H
Continued from preceeding page.
Pin No.
11
Pin
Function
CTL
Speed control input. The control implemented is fixed current
drive controlled by current feedback from Rf.
Gm = 0.58/V (typical) when Rf = 0.5 Ω
Equivalent circuit
Control reference voltage. While this pin is set to about
0.43 × VCC internally, this voltage can be modified by
applying a voltage from a low-impedance circuit.
(The input impedance is about 4.3 kΩ).
12
CTLREF
13
LIM
Current limiter function control. The output current can be
varied linearly by applying a voltage to this pin.
The slope is 0.5 A/V (typical) when Rf = 0.5 Ω.
15
16
UIN+
UIN–
U phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
17
18
VIN+
VIN–
V phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
19
20
WIN+
WIN–
W phase Hall element inputs.
Logic high is defined as states where IN+ > IN–.
21
VCC
Power supply for all internal blocks other than the output
block. This voltage must be stabilized so that noise and ripple
do not enter the IC.
Pin Assignment
No. 5974-5/8
LB1980H
Block Diagram
Synthesized output logarithmic
compression block
Hall input synthesis block
(linear matrix)
Output stage
Antilogarithm
conversion
and
differential
distribution
Upper side
saturation
prevention
control
Drive distribution circuit
and lower side saturation
prevention circuit
Differential
distribution and
torque ripple
correction
block
Control
amplifier
Feedback
amplifier
About
0.43 × VCC
Forward/
reverse
selection
FG amplifier
Reference
voltage
No. 5974-6/8
Hall
output
GaAs Hall devices
are recommended.
Hall output
Hall output
VCC/2 bias
Hall output
Forward/reverse
command voltage pin
Torque command
voltage pin
CTLREF voltage pin
Current limiter setting
voltage pin
Voltage applied to the
ADJ pin
Power system ground
LB1980H
Sample Application Circuit
No. 5974-7/8
LB1980H
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
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herein are controlled under any of applicable local export control laws and regulations, such products must
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mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of October, 1998. Specifications and information herein are subject
to change without notice.
PS No. 5974-8/8
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