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Ordering number : EN6186
LB1978V
Monolithic Digital IC
LB1978V
Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos
Functions and Features
* Three-phase sensorless motor driver * Built-in speed control * Built-in reference voltage and forward/reverse switching pin * Soft switching * Built-in short brake drive pin
Package Dimensions
unit: mm 3191-SSOP30
[LB1978V]
30 16
5.6
1.0
1 15 0.15 9.95 0.22 0.65 0.43
0.1 1.6max
SANYO : SSOP30
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Output transistor withstand voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol Vcc max Vsus Io max Pd max Topr Tstg Conditions Ratings 2.0 4 0.6 0.4 0 to 60 -40 to +125 Unit V V A W C C
Tj = 125C
Allowable Operating Ranges at Ta = 25C
Parameter Power supply voltage Symbol Vcc Conditions Ratings 1.0 to 1.7 Unit V
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
63099RM(KI) No. 6186-1/9
0.5
7.6
LB1978V
Electrical Characteristics at Ta = 25C, Vcc = 1.2V, in the specified test circuit
Parameter Power supply current Reference voltage Reference voltage characteristics Reference voltage load characteristics Oscillator cycle Rotation switching load characteristics Rotation detection accuracy COM voltage F side output saturation voltage S side output saturation voltage S/S pin input High level voltage S/S pin input Low level voltage F/S DR pin ON voltage F/S DR pin OFF voltage TC pin pull-in voltage BR1 ON voltage BR1 OFF voltage BRsat voltage CI rise voltage CI hysteresis width IRF voltage VI output current PV pin voltage IFC/VVI ratio Output transistor OFF voltage Output transistor ON voltage Symbol Icc Vref Vref / Vcc Iref Vref Iref TS TF/S NF/S VCOM- Vsat1 Vsat2 VSSH VSSL VLon VLoff VTC1 VTC2 VBRon VBRoff VBRsat VCI VCI VIRF IVI VPV IFC/VVI VOUT OFF VOUT ON Conditions START pin H, RIRF = 180 k START pin L, VBR = 0V min Ratings typ 6.8 0 0.725 0.755 1.0 -0.2 0.52 7.70 -16 12 -0.06 0.6 0.68 10.9 +16 38 0.30 0.25 0.3 0.2 F/S = H F/S = L Vcc-0.3 80 160 0.9 110 220 150 300 0.3 0.3 0.680 100 0.785 34 0.785 250 0.3 max 10 10 0.785 2.0 Unit mA A V %/V mV/A ms ms % mV V V V V V V mV mV V V V V mV V A V A/V V V
Vcc = 1.0 to 1.7V Iref = 0 to -50 A CS = 1500 pF CS = 1500 pF, RIRF = 180 k *Target TS = 0.60 ms *Target RCOM = 1 k Vcc = 1.0V, Im = 0.3A Vcc = 1.0V, Im = 0.2A
25 0.17 0.12
0.9
Io = 6 mA, VBR1 = 1.2V 0.620 60 0.725 26 0.720 150 Vcc-0.3
RIRF = 180 k VVI = 0.3V, VIV = GND
0.15 0.650 80 0.755 30 0.755 210
Note: Items shown to be "Target" are not measured.
No. 6186-2/9
LB1978V
Pd max - Ta
Allowable power dissipation, Pd max (W)
0.4
0.26
0
25 Ambient temperature, Ta - (C)
60
Pin Assignment
PGND SGND 17 14 P1 VREF
Vcc
S/S
F/S
W1
W2
DR
DU
U1
U2
V1
V2
30
29
28
27
26
25
24
23
22
21
20
19
18
16
LB1978V
1 FC
2 OSC
3 COM
4 IRF
5 CI
6 PW
7 PV
8 IV
9 VI
10 BR1
11 BR2
12 TC1
13 TC2
15 P2
Top view
P3
No. 6186-3/9
LB1978V
Equivalent Circuit Block Diagram
OSC Vcc DR TC2 TC1 P1 P2 P3 BR1 Brake circuit BR2
Divider
U1 Rotation detector V1 W1 U2 V2 W2
IRF
FG pulse
Constant current circuit
Startup switching Soft switching
Drive select + predriver
Oscillator
Logic circuitry
Soft switch
COM S/S Current bias
Startup detection
PGND DU FC
Vref
Reference voltage
Speed select divider
d/dt
Pulse
Current buffer
Comparator
VI
SGND
F/S
CI
PW
PV IV
VI
Sample Application Circuit
0.01 F
0.01 F 0.01 F
23 22 21 20 V2 19 U2 18 17 16
100
1F
30
29
28
27 DR
26 F/S
25 W1
24 V1
Vcc VREF S/S
U1 PGND W2
DU SGND P3
LB1978V
FC 1 OSC COM IRF 2 3 4 CI 5 PW 6 PV 7 IV 8 VI 9 BR1 BR2 TC1 TC2 10 11 12 13 P1 14 P2 15
2.2F 180 k 1500pF 0.01F 1k 0.1F 6.2k
180 k 0.33F
680k 0.1F
68k
20k
0.033F
No. 6186-4/9
LB1978V
Pin Description
Pin number 1 Pin name FC Equivalent circuit
Vcc
Pin function Oscillator and ripple suppression pin. The higher the capacitance connected to FG, the more effectively will ripple components be suppressed.
1
PGND
2
OSC
Vcc
Startup pulse cycle and drive switching cycle setting pin. Increased capacitance will result in higher startup pulse cycle and drive switching cycle.
2
SGND 3 COM Vcc
3
10k
Startup waveform detector offset setting pin. RCOM = 1 k results in approx. 25 mV offset at startup
120A PGND 4 IRF
Vcc
Oscillator circuit and F-V servo circuit internal current setting pin.
4
25A SGND
5
CI
Vcc
Speed adjustment pin using CR oscillation based on FG pulse edge detection.
5
SGND
Continued on next page
No. 6186-5/9
LB1978V
Continued from preceding page Pin number 6 Pin name PW Equivalent circuit Pin function CI pin waveform and reference voltage comparator output pin.
Vcc
6
PGND
7 PV
Vcc
Current buffer input/output pin.
1k
7
SGND
8 IV
Vcc
Current-to-voltage converter comparator input pin.
1k
8
SGND
9
VI
Vcc
Voltage-to-current converter input pin. Speed increases when VI pin voltage is higher than reference voltage and decreases when VI pin voltage is lower than reference voltage.
9
1k
SGND
10
BRI
Vcc
Brake bias pin. When S/S pin is Low and BR1 pin is 0.9V or higher, brake drive pin BR2 goes ON.
10
SGND
Continued on next page
No. 6186-6/9
LB1978V
Continued from preceding page Pin number 11 Pin name BR2 Equivalent circuit
Vcc
Pin function Brake drive pin. When S/S pin is Low and BR1 pin is 0.9V or higher, brake drive is activated. This is an open-collector output.
11
SGND
12 13
TC1 TC2
Motor current rise/fall slope setting pins. Vcc Setting value changes depending on the High or Low status of the F/S pin.
12 13
SGND 14 15 16 P1 P2 P3 Internal operation measurement pins which shape the current waveform. Must be left open for use.
Vcc
14 15 16
SGND
17
SGND
Signal ground pin. Separate from power supply ground. DU is base pin for U low-speed output transistor. U2, V2, and W2 are pins for connection to low-speed motor coils.
18 19 20 21
DU U2 V2 W2
Vcc
19 18
20
21
22
PGND 22 PGND Power supply ground. Continued on next page
No. 6186-7/9
LB1978V
Continued from preceding page Pin number 23 24 25 Pin name U1 V1 W1 Equivalent circuit Vcc Pin function U1, V1, and W1 are pins for connection to high-speed motor coils.
23
24
25
22
PGND 26 F/S Vcc High-speed/low-speed mode select pin. Vcc -1.0V or lower: high-speed (fast) Vcc -0.3V or higher: low-speed (slow)
26
SGND 27 DR
Vcc
Rotation direction select pin. Vcc -0.3V or higher: phase sequence U -> V -> W Vcc -1.0V or lower: phase sequence U -> W -> V
27
SGND
28 S/S
Vcc
Start/stop pin. 0.9V or higher: Start High active.
28
SGND
29
Vref
Vcc 50A
Reference voltage pin. Reference voltage is 0.75V.
29
SGND
30
Vcc
Power supply pin.
No. 6186-8/9
LB1978V
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. 6186-9/9

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