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Ordering number : EN5974
Monolithic Digital IC
LB1980H
Three-Phase Brushless Motor Driver for VCR Capstan Motors
Overview
The LB1980H is a 3-phase brushless motor driver that is particularly appropriate for VCR capstan motor drivers.
Package Dimensions
unit: mm 3233-HSOP28H
[LB1980H]
Functions
* 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
SANYO: HSOP28H
Allowable power dissipation, Pdmax -- W
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 = 25C
Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VS max IO max Pd max Topr Tstg Mounted on a 71.6 x 114.3 x 1.6 mm glass Epoxy printed circuit board Independent device Conditions Ratings 7 24 1.3 1.81 0.77 -20 to + 75 -55 to + 150 Unit V V A W W C C
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage Hall input amplitude GSENSE pin input range Symbol VS VCC VHALL VGSENSE Between the Hall inputs With respect to the control system ground Conditions Ratings 5 to 22 4.5 to 5.5 30 to 80 -0.20 to + 0.20 Unit V V mVo-p V
Electrical Characteristics at Ta = 25C, VCC = 5 V, VS = 15 V
Parameter VCC supply current [Outputs] VOsat1 Output saturation voltage VOsat2 Output leakage current [FR] FR pin input threshold voltage FR pin input bias current [Control] CTLREF pin voltage CTLREF pin input range CTL pin input bias current CTL pin control start voltage CTL pin control Gm [Current Limiter] LIM current limit offset voltage LIM pin input bias current LIM pin current control level [Hall Amplifier] Hall amplifier input offset voltage Hall amplifier input bias current Hall amplifier common-mode input voltage range [TRC] Torque ripple correction ratio ADJ pin voltage [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) IB (FG) Sink side, for the load provided by the VOsat (FG) internal pull-up resistor VG (FG) VGM (FG) For the open loop state with f = 10 kHz 41.5 0.5 44.5 -8 -100 0.5 47.5 4.0 +8 mV nA V dB V TRC VADJ For the high and low peaks in the Rf waveform when IO = 200 mA. (Rf = 0.5 , with the ADJ pin open)*1 2.37 9 2.50 2.63 % V Voff (HALL) IB (HALL) VCM (HALL) 1.3 -6 1.0 +6 3.0 3.3 mV A V Voff (LIM) IB (LIM) ILIM With Rf = 0.5 , VCTL = 5 V, IO 10 mA, Hall input logic fixed (U, V, W = H, H, L) With VCTL = 5 V and the VCREF pin open With Rf = 0.5 , VCTL = 5 V, VLIM = 2.06 V, Hall input logic fixed (U, V, W = H, H, L) 140 -2.5 830 900 970 200 260 mV A mA VCREF VCREFIN IB (CTL) VCTL (ST) Gm (CTL) With VCTL = 5 V and the CTLREF pin open With Rf = 0.5 , VLIM = 5 V, IO 10 mA, Hall input logic fixed (U, V, W = H, H, L) With Rf = 0.5 , IO = 200 mA, Hall input logic fixed (U, V, W = H, H, L) 2.00 0.46 2.15 0.58 2.05 1.50 2.15 2.25 3.50 4.0 2.30 0.70 V V A V A/V VFSR IB (FSR) 2.25 -5.0 2.50 2.75 V A IOleak IO = 500 mA, Rf = 0.5 , Sink + Source VCTL = VLIM = 5 V (With saturation prevention) IO = 1.0 A, Rf = 0.5 , Sink + Source VCTL = VLIM = 5 V (With saturation prevention) 2.1 2.6 2.6 3.5 1.0 V V mA Symbol ICC Conditions RL = , VCTL = 0 V, VLIM = 0 V (Quiescent) Ratings min typ 12 max 18 Unit mA
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.
Continued on next page.
No. 5974-2/8
LB1980H
Continued from preceding page. Parameter [Saturation] Saturation prevention circuit lower side voltage setting [TSD] TSD operating temperature Hysteresis width TSD TSD Design target value*2 Design target value*2 180 20 C C The voltages between each OUT and VOsat (DET) Rf pair when IO = 10 mA, Rf = 0.5 , and VCTL = VLIM = 5 V 0.175 0.25 0.325 V Symbol Conditions Ratings min typ max Unit
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 x (Vp - Vb) 100 x (%) Vp - Vb
Truth Table and Control Functions
Source Sink 1 Phase V Phase W Phase W Phase V Phase U Phase W Phase W Phase U Phase U Phase V Phase V Phase U Phase W Phase V Phase V Phase W Phase W Phase U Phase U Phase W Phase V Phase U Phase U Phase V Hall input U H V H W L FR H L H L H L H L H L H L 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.
2
H
L
L
3
H
L
H
4
L
L
H
5
L
H
H
6
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.
Control Function and Current Limiter Function
IOUT
IOUT
Slope: 0.50 A/V (typical)
Control Characteristics
Control Limiter Characteristics No. 5974-3/8
LB1980H Pin Descriptions
Pin No. 27 28 1 Pin UOUT VOUT WOUT U phase output V phase output W phase output Function (Spark killer diodes are built-in.) Equivalent circuit
4 24
Rf (SENSE) Rf (PWR)
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. 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.) 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)) 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 k.) Ground for all circuits other than the output transistors. The lowest potential of the output transistors is that of the Rf pin.
OUT
Lower side saturation prevention circuit input block
22
VS
5
GSENSE
6
FR
23
ADJ
7
GND
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
Speed control loop frequency characteristics correction.
Continued on next page.
No. 5974-4/8
LB1980H
Continued from preceeding page. Pin No. 11 Pin CTL Function 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 Control reference voltage. While this pin is set to about 0.43 x VCC internally, this voltage can be modified by applying a voltage from a low-impedance circuit. (The input impedance is about 4.3 k). 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 . Equivalent circuit
12
CTLREF
13
LIM
15 16 17 18 19 20
UIN+ UIN- VIN+ VIN- WIN+ WIN-
U phase Hall element inputs. Logic high is defined as states where IN+ > IN-. V phase Hall element inputs. Logic high is defined as states where IN+ > IN-. 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
Output stage
Synthesized output logarithmic compression block
Hall input synthesis block (linear matrix)
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 x VCC
Forward/ reverse selection
FG amplifier
Reference voltage
No. 5974-6/8
GaAs Hall devices are recommended.
Hall output Power system ground Voltage applied to the ADJ pin
Sample Application Circuit
Hall output
Hall output
Hall output
LB1980H
Current limiter setting voltage pin CTLREF voltage pin Torque command voltage pin Forward/reverse command voltage pin VCC/2 bias
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. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or 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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