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Ordering number : EN5979A
LB1998
Monolithic Digital IC
LB1998
Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive
Overview
The LB1998 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives.
Package Dimensions
unit: mm 3234-HSOP28HC
[LB1998]
15.3 6.2 2.7 28 15
Functions
* Current linear drive * Control V type amplifier * Top side current detection technique reduces loss voltage of current detection resistor. Voltage effect of this resistor reduces internal current drain of IC. * Built-in current limiter circuit * Built-in reverse blocking circuit * Hall FG output * Built-in 1 Hall FG/3 Hall FG switching circuit * Built-in short braking circuit * Built-in Hall bias cicuit * Built-in thermal shutdown circuit * Built-in S/S function * Built-in 3 mode gain switching function ensures compatibility with 8/12 cm CAV and CLV discs
7.9
0.65
0.25
1
0.85
0.8
0.3
2.5max
0.1
2.25
SANYO : HSOP28HC
2.0
Pd max - Ta
With substrate (114.3 mmx76.1 mmx1.6 mm3)
Allowable power dissipation, Pd max - W
1.8 1.6
1.2 1.08
0.8
IC only
0.79
0.474 0.4
0 -25
0
Ambient temperature, Ta - C
25
50
75
1.3
10.5
4.9
100
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
60499RM(KI)/30299RM(KI) No. 5979-1/9
LB1998 Specifications
Maximum Ratings at Ta = 25C
Parameter Power supply voltage Symbol Conditions Ratings 7.0 14.4 14.4 14.4 Unit V V V V V A W W C C
VCC1 max VCC2 max VCC3 max
Applied output voltage Applied intput voltage Output current Allowable power dissipation
VO max VIN max IO max
Pd max IC only
VCC1
1.3 0.79 1.80 -20 to +75 -55 to +150
with substrate (114.3 x 76.1 x 1.6 mm3, glass exposy)
Operating temperature Storage temperature Topr Tstg
Operating Conditions at Ta = 25C
Parameter Power supply voltage Symbol Conditions Ratings 4 to 6 Unit V V
VCC1 VCC2 VCC1
4 to 13.6
Sample Application at Ta = 25C
Parameter 12V type Symbol Conditions Regulated voltage Unregulated voltage Ratings 4 to 6 4 to 13.6 Unit V V
VCC1 VCC2
No. 5979-2/9
LB1998
Electrical Characteristics at Ta = 25C, VCC1 = 5V, VCC2 = 12V
Parameter [Power supply current] Power supply current Symbol Conditions min Ratings typ max Unit
ICC1 ICC2 ICC1OQ ICC2OQ
VCIN = VCREF VCIN = VCREF VS/S = 0V VS/S = 0V IO = -0.5A, VCC1 = 5V, VCC2 = 12V IO = 0.5A, VCC1 = 5V, VCC2 = 12V RRF = 0.25
1.2
8 250 300 200 60
mA mA A A
Output idle current
[Output] Saturation voltage, upper side 1 Saturation voltage, lower side 1 Current limiter setting voltage [Hall amplifier] Common mode input voltage range Input bias current Minimum Hall input level [S/S pin] High level voltage Low level voltage Input current Leak current [Control]
VOU1 VOD1 VCL VHCOM IHIB VHIN VS/SH VS/SL IS/SI IS/SL IVC IVCREF GVCO VCTH VCTH
VGCOFFSET
1.0 0.3 0.25
V V V
VCC1-1.0
V A
1 60
mVP-P VCC1
0.7 200 V V A A A A times 1.85 200 V mV
2.0
VS/S = 5V VS/S = 0V VCIN = VCREF = 1.65V VCIN = VCREF = 1.65V VRF/VC, Note 1 VCREF = 1.65V, Note 1 VCREF = 1.65V, Note 1
Design target value f = 10 kHz, Design target value 0 1.55 100 0.25 -30
VCIN pin input current VCREF pin input current
Voltage gain Startup voltage Startup voltage width [Gain switching amplifier] Input offset voltage OPEN LOOP voltage gain Same-phase input voltage range [Hall power supply] Hall power supply voltage Allowable current [Thermal shutdown] Operating temperature Hysterisis [Short braking] Brake pin at High level Brake pin at Low level [1 Hall FG/3 Hall FG switching]
1 1
-8 43
+8
mV dB
GVGC VGCOM VH IH TTSD TTSD VBRH VBRL VFSH VFSL RINH RINL
3.5
V
IH = 5 mA
20
0.8
V mA
Design target value Design target value
150
180 15
210
C C
4 0
5 1
V V
FGSEL pin at High level FGSEL pin at Low level
[Gain switching analog switch] Analog switch at High level Analog switch at Low level
4 0
5 1
VCC-0.5
0
VCC1
0.2
Note: * During S/S OFF (standby), the Hall comparator is at High. * Gain switching amplifier operated at a factor of 1. * Design target values are not measured.
No. 5979-3/9
LB1998 Truth Table
Hall input
Source -> Sink
U V Phase W -> Phase V Phase V -> Phase W
Control W L
VCIN
H L H L H L H L H L H L
1 2 3 4 5
H H L
H L L H
Phase W -> Phase U Phase U -> Phase W Phase V -> Phase W Phase W -> Phase V Phase U -> Phase V Phase V -> Phase U Phase V -> Phase U Phase U -> Phase V
L H
L H L
L H H
L H
6
Input:
Phase U -> Phase W Phase W -> Phase U
H: Input 1 is higher in potential than input 2 by at least 0.2V. L: Input 1 is lower in potential than input 2 by at least 0.2V.
Brake Mode Switching Truth Table
BRAKE pin L, OPEN H
VCIN > VCREF
Foward Foward
VCIN < VCREF
Reverse brake Short brake
Pin Assignment
VCIN 1 RIN1 2 RIN2 3 RIN3 4 SIG GND 5 S/S 6 BRAKE 7 28 ROUT3 27 ROUT2 26 ROUT1 25 FGSEL 24 FC 23 VCREF 22 WOUT
PWR GND
LB1998
PWR GND
FG 8 RS 9 VH 10 WIN1 11 WIN2 12 VIN1 13 VIN2 14
21 VOUT 20 UOUT 19 VCC2 18 RF 17 VCC1 16 UIN2 15 UIN1
Top view
A11194
No. 5979-4/9
VCC1 RF
VCC2
Block Diagram
UIN1
+
UIN2
-
VIN1
+
Matrix
Waveform distributor
VIN2
-
UOUT VOUT WOUT
WIN1
+
WIN2
-
LB1998
PWR GND Current limiter Short brake/ reverse brake switching BRAKE
VH
Hall power supply
- + + - - +
-
Forward/ reverse
VCREF
+
VCIN Gain switching amplifier ROUT1
-
Thermal shutdown
+
1 Hall FG/ 3 Hall FG
RIN1 ROUT2 RIN2
Rotation direction detector
-
Reference voltage
+
ROUT3 RIN3 RS FGSEL FC S/S FRAME GND
A11193
No. 5979-5/9
FG
LB1998 Sample Application Circuit
Control voltage
1 VCIN
Gain switching SW(0V or VCC1)
ROUT3 28 ROUT2 27 ROUT1 26
1/3 Hall FG switching
2 RIN1
Gain switching SW(0V or VCC1)
3 RIN2
Gain switching SW(0V or VCC1)
4 RIN3
Applying VCC1 to each pin activates load between ROUT-VCIN S/S
FGSEL 25 FC 24 VCREF 23 WOUT 22 0.1F
0V or Open:1 Hall FG :3 Hall FG VCC1
5 SIG GND 6 S/S
0.1F
Control reference voltage
Brake mode switching
7 BRAKE
LB1998
PWR GND PWR GND
FG output
8 FG
Reverse detection
VOUT 21 0.1F UOUT 20 VCC2 19 RF 18 VCC1 17 0.1F UIN2 16 UIN1 15
Hall element Power supply voltage 5V
9 RS 10 VH 11 WIN1 12 WIN2 13 VIN1 14 VIN2
0.1F
Motor power supply voltage 12V
0.1F
0.033F
0.033F
0.033F
A11195
No. 5979-6/9
LB1998 Pin Descriptions
Pin number
19
Pin name
VCC2
Pin voltage
4V to 13.6V
Equivalent circuit
Pin function
Source side predrive voltage and constant current control amplifier voltage supply pin Power supply pin for all circuits except output transistors, source predriver, and low current control amplifier Reverse detector pin Forward rotation: High Reverse rotation: Low 1 Hall or 3 Hall element waveform Schmitt comparator combined output U phase Hall element input and reverse detector U phase Schmitt comparator input pin Logic High indicates UIN1 > UIN2. V phase Hall element input and reverse detector V phase Schmitt comparator input pin Logic High indicates VIN1 > VIN2. W phase Hall element input and reverse detector W phase Schmitt comparator input pin Logic High indicates WIN1 > WIN2. Hall element lower side bias voltage supply pin
17
VCC1
4V to 6V
VCC1
9
RS
100A
10 k 8 9
8
FG
A11196
15 16
UIN1 UIN2
11 13 200
VCC1 25A 12 14 200 16
13 14
VIN1
VIN2
1.2V to VCC1-1V
15
25A
25A
A11197
11 12
WIN1 WIN2
VCC1 75A 10
10
VH
30 k 2 k
A11198
VCC1 75 k 6 50 k
A11199
6
S/S
0V to WCC1
When this pin is at 0.7V or lower, or when it is open, all circuits are inactive. When driving motor, set this pin to 2V or higher.
5
SIG GND
VCC1
GND pin for all circuits except output Control loop frequency compensator pin. Connecting a capacitor between this pin and GND prevents closed loop oscillation in current limiting circuitry.
2 k
24
FC
24 20 k 5 k
A11200
Continued on next page
No. 5979-7/9
LB1998
Continued from preceding page
Pin number Pin name Pin voltage Equivalent circuit
VCC1 15A 25A 68 k 25A 15A
Pin function
Control reference voltage supply pin. Determines control start voltage.
23
VCREF
0V to 3.5V
200 23
A11201
VCC1 6A 6A 6A
1
VCIN
0V to 3.5V
200 1 6 pF 23
Speed control voltage supply pin V type control technique VC > VCREF : Forward VC < VCREF : Slowdown (Reverse-blocking circuit prevents reverse rotation.)
A11202
22 21 20
WOUT
PWR GND
VOUT UOUT
3.9 20 21 22 3.9 VCC2 18
W phase output Output transistor GND V phase output U phase output Upper side output PNP transistor collector pin (common for all 3 phases). For current detection, connect resistor between VCC3 pin and RF pin. Constant current control and current limiter works by detecting this voltage. 1 Hall FG/3 Hall FG output, switching pin: High -> 3 Hall FG Low/Open -> 1 Hall FG
A11204
18
RF
PWRGND
A11203
VCC1 75 k 25
25
FGSEL
50 k
VCC1 100A 75 k
7
BRAKE
50 k
3
A11205
Brake mode switching pin BRAKE: High -> Short brake Low/Open -> Reverse brake Brake mode changes when VCIN > VCREF.
Continued on next page
No. 5979-8/9
LB1998
Continued from preceding page
Pin number Pin name Pin voltage Equivalent circuit Pin function
2
RIN1
Gain switching selector pin When set to High (VCC1), resistor connected between ROUT1 and VCIN is selected as negative feedback resistor.
VCC1
3
RIN2
0 to VCC1 Low: 0V High: VCC1
26 27 28 10 k 2 3 4
Gain switching selector pin When set to High (VCC1), resistor connected between ROUT2 and VCIN is selected as negative feedback resistor. Gain switching selector pin When set to High (VCC1), resistor connected between ROUT3 and VCIN is selected as negative feedback resistor. Negative feedback resistor connector pins Connect negative feedback resistors between these pins and VCIN.
4
RIN3
A11206
26 27 28
ROUT1 ROUT2 ROUT3
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 June, 1999. Specifications and information herein are subject to change without notice. PS No. 5979-9/9

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