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Ordering number : ENN6185
Monolithic Digital IC
LB1988N
Three-Phase Sensorless Motor Driver + Loading Motor Driver
Overview
The LB1988N is a sensorless motor driver that includes an on-chip loading motor driver as well. It is optimal for VCR drum motor drive.
Package Dimensions
unit: mm 3196-DIP30SD
[LB1988N]
30 16
Functions and Features
* * * * * * * Soft switching drive Does not require Hall-effect sensors Does not require FG sensors PG amplifier Thermal shutdown circuit Current limiter circuit Loading motor driver
10.16 8.6
1
27.2
15
1.14
1.78
0.48
0.95
SANYO: DIP30SD
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Maximum supply voltage 3 Maximum applied output voltage Maximum applied input voltage Maximum cylinder current Maximum loading current Allowable power dissipation Operating temperature Storage temperature Symbol VCCmax VCCLmax VREGmax Vomax VI1max Iomax Iomax (AVE) Iomax (peak) Pdmax Topr Tstg When mounted on the specified printed circuit board* Conditions Ratings 14.5 14.5 7.0 14.5 - 0.3 to VREG + 0.3 1.0 0.4 1.2 2.8 -20 to +75 -55 to +150 Unit V V V V V A A A W C C
Note: * Specified printed circuit board: 114.3 x 76.1 x 1.6 mm3, glass epoxy
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
71699RM (OT) No. 6185-1/9
3.0
3.95max
3.25
0.25
LB1988N Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage 1 Supply voltage 2 Supply voltage 3 Symbol VCC VCCL VREG Conditions Ratings 8 to 13.8 8 to 13.8 4 to 6 Unit V V V
Electrical Characteristics at Ta = 25C, VCC = VCCL = 12 V, VREG = 5 V
Parameter Supply voltage 1 Supply voltage 2 Supply voltage 3 Output saturation voltage 1 Output saturation voltage 2 MC pin common-mode input voltage range VC pin input bias current Control start voltage Closed loop control gain PCOUT output current 1 PCOUT output current 2 VCOIN input current Minimum VCO frequency Maximum VCO frequency C1/C2 source current ratio C1/C2 sink current ratio C1 source/sink current ratio C2 source/sink current ratio Thermal shutdown operating temperature Thermal shutdown hysteresis Symbol ICC ICCL IREG VOSAT1 VOSAT2 VIC IVC VTHVC GMVC IPCOU IPCOD IVCOIN VC = 0 V VRF = 10 mV RF = 0.5 Source side Sink side VCOIN = 5 V Conditions VC = 0 V, XIN = YIN = 0 V VC = 0 V, XIN = YIN = 0 V VC = 0 V, XIN = YIN = 0 V IO = 0.4 A, source + sink IO = 0.8 A, source + sink 0 -2 2.4 0.75 -1 2.5 0.95 -90 90 0.1 400 18.5 -12 -12 -35 -35 150 180 15 +12 +12 +15 +15 210 0.2 2.6 1.15 6.5 1.4 1.8 Ratings min typ 6.5 max 10 1 10 2.0 2.6 VCC - 2 Unit mA mA mA V V V A V A/V A A A Hz kHz % % % % C C
fVCOMIN CX = 0.022 F, VCOIN = open fVCOMAX CX = 0.022 F, VCOIN = 5 V RSOURCE IC1SOURCE/IC2SOURCE RSINK RC1 RC2 TTSD TTSD IC1SINK/IC2SINK IC1SOURCE/IC1SINK IC2SOURCE/IC2SINK * *
FG and PG Amplifier Block at Ta = 25C, VCC = VCCL = 12 V, VREG = 5 V
Parameter Back EMF FG Output on voltage Output off voltage PG amplifier Input offset voltage Input bias current Common-mode input voltage range Open-loop gain Output on voltage Output off voltage Schmitt amplifier hysteresis VIO IBIN VICOM GVPG VOL VOH VSHIS 4.5 70 93 115 * f = 1 kHz -8 -250 1 55 0.4 3.5 +8 mV nA V dB V V mV VOL VOH 4.5 0.4 V V Symbol Conditions Ratings min typ max Unit
Note: Items marked with an asterisk are design target values and are not tested.
Continued on next page.
No. 6185-2/9
LB1988N
Continued from preceding page.
Loading Block at Ta = 25C, VCC = VCCL = 12 V, VREG = 5 V
Parameter 1 (HIGH) 2 (LOW) Symbol VIN1 VIN2 IIN VT Vref = VS, between the output and VS VSAT U-1 IO = 0.2 A, CW/CCW mode VSAT L-1 Saturation voltage VSAT U-1' VSAT L-1' VSATU-1" Upper side residual voltage VSATL-1" Output transistor leakage current up ILU Vref = VS, between the output and VS IO = 0.2 A, CW/CCW mode Vref = VS, between the output and VS IO = 0.4 A, CW/CCW mode Vref = VS, between the output and VS IO = 0.4 A, CW/CCW mode Vref = 8 V, between the output and ground IO = 0.2 A, CW/CCW mode Vref = 8 V, between the output and ground IO = 0.4 A, CW/CCW mode 7.2 7.2 Sink, VIN = 3.5 V Conditions Ratings min 3.5 0 30 0.7 1.5 0.2 1.6 0.3 8.0 8.0 2.1 0.3 2.2 0.5 8.8 8.8 50 50 1.3 1.0 -5 -2 typ max 5 0.8 50 Unit V V A V V V V V V V A A V A
Input voltage Input current Input hysteresis
down ILL up VFU IF = 0.4 A
Diode forward voltage Control supply current
down VFL IF = 0.4 A lref
No. 6185-3/9
LB1988N Loading Motor Truth Table
Input XIN L H L H YIN L L H H XOUT Off H L L Output YOUT Off L H L Mode Standby Forward Reverse Brake
Pdmax -- Ta
Mounted on the specified printed circuit board (114.3 x 76.1 x 1.6 mm3, glass epoxy)
Allowable power dissipation -- Pd [W]
2.80
1.68
0 -20 0 25 50 75
Ambient temperature -- Ta [C]
Pin Assignment
FC 1 VC 2 VREG 3 PGIN+ 4 PGIN- 5 PGOUT1 6 PGOUT2 7 BFGO 8 LVCC 9 VREF 10 XIN 11 YIN 12 XOUT 13 LGND 14 YOUT 15
30 29 28 27 26 25 24
GND PCOUT VCOIN CX C2 C1 WIN VIN UIN VCC RF MCOM WOUT VOUT UOUT
LB1988N
23 22 21 20 19 18 17 16
Top view
No. 6185-4/9
VREG VCC
BFGO MCOM
Rotor position detection circuit
Thermal shutdown circuit
UIN VIN WIN
Mask circuit
Startup control circuit
Timing control circuit
Soft switching drive circuit
2200 pF
C1
C2
Output drive circuit
2200 pF
UOUT VOUT
PLL
VCO
Divide-by-8 circuit
WOUT
LB1988N
560 k
PCOUT
VCOIN RF
Upper side saturation prevention circuit
0.47 F
CX 1 k 0.5 GND LVCC
0.022 F
VC
200
0. 1 F VREG 5 k
FC
Output drive circuit
LGND
Block Diagram (Note that the values of the external components will vary with the motor actually used.)
200 PGOUT2 XIN
200 YIN VREF XOUT YOUT
PGIN+
PGIN-
PGOUT1
No. 6185-5/9
LB1988N Pin Functions
Pin No. Symbol Voltage Function Equivalent circuit diagram
VREG
1
FC
Frequency characteristics correction. Insert a capacitor between this pin and ground to prevent closed-loop oscillation in the current control system.
1 k 1
10 k
5 k
VREG VCC 50 F 50 F 27 k
Speed control. This circuit implements a constant-current control scheme in which current feedback from the RF pin is applied.
2
40 k 200 24 k
2
VC
0 V to VREG
3
VREG
4 V to 6 V
Control system power supply. This power supply must be stabilized to prevent ripple or other noise entering the circuit.
VREG
4 PGIN+ PG amplifier + input. This input is biased at 1/2 VREG internally.
6 F
6 F
6 F 10 k
200
5 PGIN- PG amplifier - input.
200 10 k
5
4
V REG 60 F 6 38 30 F
6
PGOUT1
PG amplifier linear output.
38
5 k 4
5 k
Continued on next page.
No. 6185-6/9
LB1988N
Continued from preceding page.
Pin No. Symbol Voltage Function Equivalent circuit diagram
VCC
7
PGOUT2
PG Schmitt amplifier output.
VREG+VF VREG 100 A 5 k
7
8 BFGO Motor back EMF detection FG output (3-phase synthesized).
8
9
LVCC
8 to 13.8 V
Loading motor driver output transistor power supply.
VCCL
13 15
10 VREF 0 to VCCL Loading motor driver output voltage setting.
1 mA
1 mA 30 k
30 k 50 k
10
V REG
11 XIN
11
0 V to VREG Loading motor driver logic input.
100 k
12
50 k
12
YIN
50 k
9
13 XOUT
13
Loading motor driver output.
15
2 k
15
YOUT
2 k 14 10
14
LGND
Loading motor driver output transistor ground.
Continued on next page.
No. 6185-7/9
LB1988N
Continued from preceding page.
Pin No. 16 Symbol UOUT Voltage Function Equivalent circuit diagram
VCC
17 VOUT Drum motor driver output.
20 F 3.9 10 k 16 17 20 18 22 23 24
18
WOUT Lowest potential of the drum motor driver output transistor. Constant-current control is implemented by detecting this voltage. The current limiter also functions by detecting this voltage. Internal reference voltage and power supply for the drum motor driver output block and coil waveform detection circuit.
30 k 3.9 30 k
20
RF
21
VCC
8 to 13.8 V
VCC
19 MCOM Motor coil midpoint input. This voltage is used as the reference voltage in coil voltage waveform detection.
16 17 18 22 23 24
2 k 10 k 200 200 200
19
22
UIN Coil waveform detection comparator inputs. These are connected to each of the phase outputs though internal 10-k resistors.
23
VIN
24
WIN
VREG
25 C1 Triangular waveform generator capacitor connection. The triangular waveform generated using this pin is used to implement soft switching for the coil output waveforms. 26 C2
15 F
15 F
25 26
5 F
1 k 1/2VREG -VF
VREG 100 A
The value of the capacitor connected between this pin and ground in the VCO circuit determines the operating frequency range and the minimum operating frequency.
300
27
CX
27
Continued on next page.
No. 6185-8/9
LB1988N
Continued from preceding page.
Pin No. Symbol Voltage Function Equivalent circuit diagram
VREG
28
VCOIN
VCO circuit control voltage input. The PCOUT pin voltage is applied to this pin through an RC filter.
10 k 1.75 V 50 k
28
50 A
50 A
VREG
29
PCOUT
VCO circuit PLL output.
29
30
GND
Ground used for all circuits other than the drum and loading motor driver output transistors.
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. 6185-9/9

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