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Ordering number : ENN5792A
Monolithic Digital IC
LB1991V
Three-Phase Brushless Motor Driver for Portable VCR Capstan Motors
Overview
The LB1991V is a 3-phase brushless motor driver IC that is optimal for driving the capstan motor in portable VCR products.
Package Dimensions
unit: mm 3175A-SSOP24
[LB1991V]
24 13
1.0 5.6 0.1 0.43 1.6max 0.15
Functions
* 3-phase full-wave voltage drive technique (120 voltage-linear technique) * Torque ripple correction circuit (overlap correction) * Speed control technique based on motor voltage and current control. * Built-in FG comparators * Built-in thermal shutdown circuit
1
8.0
12
0.22
0.65
SANYO: SSOP24
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Symbol VCC1 max Maximum supply voltage VCC2 max VS max Applied output voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature VO max IO max Pd max Topr Tstg Independent IC Conditions Ratings 10 11 11 VS + 2 1.0 440 -20 to +75 -55 to +150 Unit V V V V A mW C 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 Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
73099TH (OT)/53098RM (OT) No. 5792-1/8
0.5
7.6
LB1991V Allowable Operating Ranges at Ta = 25C
Parameter Symbol VCC1 Supply voltage VCC2 VS Hall input amplitude VHALL Between Hall effect element inputs VCC1 VCC2 Conditions Ratings 2.7 to 6.0 3.5 to 9.0 Up to VCC2 20 to 80 Unit V V V mVp-p
Electrical Characteristics at Ta = 25C, VCC1 = 3 V, VCC2 = 4.75 V, VS = 1.5 V
Parameter [Supply Current] VCC1 current drain VCC2 current drain VCC1 quiescent current VCC2 quiescent current VS quiescent current [VX1] High side residual voltage Low side residual voltage [VX2] High side residual voltage Low side residual voltage Output saturation voltage Overlap High/low overlap difference [Hall Amplifiers] Input offset voltage Common-mode input voltage range I/O voltage gain [Standby Pin] High-level voltage Low-level voltage Input current Leakage current [FRC Pin] High-level voltage Low-level voltage Input current Leakage current [VH] Hall supply voltage (-) pin voltage [FG Comparator] Input offset voltage Input bias voltage Input bias current offset Common-mode input voltage range Output high-level voltage Output low-level voltage Voltage gain Output current (sink) [TSD] TSD operating temperature TSD temperature hysteresis T-TSD TSD Design target value *1 Design target value *1 180 20 C C VFGOFF IbFG IbFG VFGCM VFGOH VFGOL VGFG IFGOS At the internal pull-up resistors At the internal pull-up resistors *1 For the output pin low level 100 5 VFGIN+ = VFGIN- = 1.5 V VFGIN+ = VFGIN- = 1.5 V -100 1.2 2.8 0.2 -3 +3 500 +100 2.5 mV nA nA V V V dB mA VHALL VH(-) IH = 5 mA, VH(+) - VH(-) IH = 5 mA 0.85 0.81 0.95 0.88 1.05 0.95 V V VFRCH VFRCL IFRCIN IFRCLK VFRC = 3 V VFRC = 0 V 20 2.5 0.4 30 -30 V V A A VSTH VSTL ISTIN ISTLK VSTBY = 3 V VSTBY = 0 V 25 2.5 0.4 40 -30 V V A A VHOFF VHCM VGVH *1 Rangle = 20 k Rangle = 20 k -5 0.95 25.5 28.5 +5 2.1 31.5 mV V dB VXH2 VXL2 VO(sat) O.L O.L IOUT = 0.5 A IOUT = 0.5 A IOUT = 0.8 A, Sink + Source RL = 39 x 3, Rangle = 20 k *2 (Average upper side overlap) - (Average lower side overlap) *2 73 -8 80 0.25 0.25 0.40 0.40 1.4 87 +8 V V V % % VXH1 VXL1 IOUT = 0.2 A IOUT = 0.2 A 0.15 0.15 0.22 0.20 0.29 0.25 V V ICC1 ICC2 ICC1Q ICC2Q ISQ IOUT = 100 mA IOUT = 100 mA VSTBY = 0 V VSTBY = 0 V VSTBY = 0 V 75 3 7.0 1.5 5 10.0 3.0 100 100 mA mA mA A A Symbol Conditions Ratings min typ max Unit
Notes: 1. Items specified as design target values in the conditions column are not tested. 2. The standard for overlap is the value as measured.
No. 5792-2/8
LB1991V
Allowable power dissipation, Pd max -- W
Ambient temperature, Ta -- C
Pin Assignment
Truth Table
Source phase Sink phase 1 VW WV UW WU UV VU WV VW WU UW VU UV H Hall input H L FRC H L H L H L H L H L H L
2
H
L
L
3
H
L
H
4
L
L
H
5
L
H
H
6
L
H
L
Note: The "H" entries in the FRC column indicate a voltage of 2.50 V or higher, and the "L" entries indicate a voltage of 0.4 V or lower. (When VCC1 is 3 V.) At the Hall inputs, for each phase a high-level input is the state where the (+) input is 0.02 V or higher than the (-) input. Similarly, a low-level input is the state where the (+) input is 0.02 V or lower than the (-) input.
No. 5792-3/8
LB1991V Pin Functions
Pin No. 1 2 3 Pin VCC1 VCC2 VS UOUT Equivalent circuit Supply voltage for all circuits other than the IC internal output block and the amplitude control block. Supply voltage for the IC internal output control block and the amplitude control block. Motor drive power supply. The voltage applied to this pin must not exceed VCC2. U phase output Pin function
5
7
VOUT
V phase output (These outputs include built-in spark killer diodes.)
9
WOUT Rf
W phase output
6, 8
Ground for the output power transistors
10
VH+ Hall element bias voltage supply A voltage that is typically 0.95 V is generated between the VH + and VH- pins. (When IH is 5 mA.)
11
VH-
13
GND
Ground for circuits other than the output transistor The Rf pin potential is the lowest output transistor potential. Forward/reverse selection. Applications can select motor forward or reverse direction rotation using this pin. (This pin has hysteresis characteristics.)
14
FRC
15
STBY
Selects the bias supply for all circuits other than the FG comparators. The bias supply is cut when this pin is set to the low level.
16 17 18 19 20 21 12
UIN1 UIN2 VIN1 VIN2 WIN1 WIN2 ANGLE
U phase Hall element input The logic high level is the state where the IN+ voltage is greater than the IN- voltage. V phase Hall element input The logic high level is the state where the IN+ voltage is greater than the IN- voltage. W phase Hall element input The logic high level is the state where the IN+ voltage is greater than the IN- voltage. Hall input/output gain control. The gain is controlled by the resistor connected between this pin and ground.
22
FGIN+
FG comparator noninverting inputs. There is no internally applied bias.
23
FGIN-
FG comparator inverting inputs. There is no internally applied bias.
24
FGOUT
FG comparator outputs. There is an internal 20-k resistor load.
No. 5792-4/8
Block Diagram
Forward/re verse switching current distribution Drive signal current generation block Synthesized signal level shifters
Power to the thick line blocks is supplied from VCC2.
Hall input synthesis (matrix)
Hall amplifiers
LB1991V
Upper and lower amplitude limiters
1.2-V reference voltage and bias startup circuit
Bias supply
Hall power-supply voltage output circuit
FG amplifier
No. 5792-5/8
LB1991V Overlap Generation and Calculation Method
Upper side residual voltage
Upper side clamp potential
Absolute voltage
Electrical angle
Calculated center point
Lower side clamp potential Lower side residual voltage
Time
[Overlap Generation] Since the voltage generated in the amplitude control block is, taking the center point as the reference, 2 x x (1/2 VS - VX) on one side, the intersection point of the waveform will be x (1/2 VS - VX) from the center point. To clamp that waveform at (1/2 VS - VX) referenced to the center point the overlap must be: A/B x 100 = x 100 (%). [Overlap Calculation] * Upper side overlap (VS - VXH - VXL) (VS - VXH + VXL) Calculated center point: VN = ---------------- + VXL = ---------------- 2 2 Since A = V - VN, B = VS - VXH - VN, the upper side overlap will be: A V - ((VS - VXH + VXL)/2) = -- = ---------------------------- x 100 (%) B VS - VXH - ((VS - VXH + VXL)/2) Which can be calculated as: 2V - (VS - VXH) - VXL = ---------------------- x 100 (%). (VS - VXH) - VXL * Lower side overlap Since C = VN - V, and D = VN - VXL, the lower side overlap will be: C ((VS - VXH + VXL)/2) - V = -- = ------------------------ x 100 D ((VS - VXH + VXL)/2) - VXL Which can be calculated as: (VS - VXH) - VXL -2V = ---------------------- x 100 (%). (VS - VXH) - VXL
No. 5792-6/8
LB1991V Test Circuit
No. 5792-7/8
LB1991V
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 July, 1999. Specifications and information herein are subject to change without notice. PS No. 5792-8/8

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