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Ordering number : ENN6656A
Monolithic Digital IC
LB11981
Three-Phase Sensorless Motor Driver
Applications
Refrigerator fan motors
Package Dimensions
unit: mm 3222-HSOP28 (275 mil)
[LB11981]
28 15
1.0 5.6 0.2 Ratings 30 Power supply for output stage 30 30 -0.3 to VCC + 0.3 1.0 Independent IC 0.5 -20 to +75 -55 to +150 0.1 1.8max 0.5 7.6 Unit V V V V A W C C
Features
* No Hall sensors required. * No FG sensors required. * Lock detection circuit (Can be set to operate in either automatic recovery or latching mode.) * Thermal shutdown circuit * Current limiter circuit * Low-voltage shutdown circuit * Forward/reverse switching * Supports both single- and dual-power supply circuits.
1
0.8 2.7 0.3
14
15.2
0.8
SANYO: HSOP28 (275 mil)
Specifications
Maximum Ratings at Ta = 25C
Parameter Supply voltage 1 Supply voltage 2 Applied output voltage Applied input voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VCC max VO max VI max IO max Pdmax Topr Tstg Conditions
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
42001RM (OT) No. 6656-1/7
LB11981 Operating Conditions at Ta = 25C
Parameter Supply voltage 1 Supply voltage 2 Symbol VCC VCCM Conditions Ratings *8 (5) to 28 8 to 28 Unit V V
Note: * This device should normally be used with VCC 8 V. If used with 5 V VCC < 8 V, short the VCC and VREG pins together. Note that in this case the electrical characteristics of the device become more easily influenced by fluctuations in the VCC supply voltage.
Electrical Characteristics at Ta = 25C, VCC = VCCM = 18 V
Parameter Supply current 1 Supply current 2 Internal power supply Internal supply load regulation Output saturation voltage 1 Output saturation voltage 2 MCOM pin common-mode input voltage range PCOUT pin output current 1 PCOUT pin output current 2 VCOIN pin input current Minimum VCO frequency Maximum VCO frequency Maximum CX pin charge/discharge current Minimum CX pin charge/discharge current Thermal shutdown circuit operating temperature Thermal shutdown circuit hysteresis BFGO pin output saturation voltage [Lock Detection Circuit] LKC pin voltage threshold Threshold level hysteresis LKC pin charge current LKC pin discharge current LAT pin input current LKO pin saturation voltage [Low-Voltage Cutoff Circuit] Low-voltage detection voltage Hysteresis [Forward/Reverse Circuit] INFR pin input current INFR pin high-level input threshold voltage INFR pin low-level input threshold voltage Note: * Design target values are not tested. IINFR VINH VINL V (INFR) = 5 V 38 3.0 1.0 43 48 A V V VT VF VREG pin detection 38 150 4 180 4.2 210 V mV Vth Vth Ichg Idis ILAT VsatLKO V (LKC) = 0 V V (LKC) = 4.2 V V (LAT) = 0 V, V (LKC)= 4.2 V ILOAD = 1 mA, V(LKC) = 4.2 V 3.7 1.8 0.8 0.52 3.2 4 2 1 0.65 4 0.2 4.3 2.2 1.2 0.78 4.8 0.4 V V A A A V Symbol ICC ICCM VREF VREF VOSAT1 VOSAT2 VIC IPCOU IPCOD IVCOIN fVCOmin Source side Sink side VCOIN = 4 V VCOIN = open 0.85 36 550 11 150 ILOAD = -5 mA IO = 0.4 A, Source + Sink IO = 0.8 A, Source + Sink 0 -120 80 -100 100 1 1 42 650 14 180 15 0.2 0.4 LKC = 5 V Conditions Ratings min 8.8 480 4.75 typ 11 600 5.0 30 1.4 2.0 max 13.2 720 5.25 50 1.7 2.4 VCC - 2 -80 120 2 1.15 48 750 17 210 Unit mA A V mV V V V A A A kHz kHz A A C C V
fVCOmax VCOIN = 5 V Icxmax Icxmin TTSD TTSD VsatFG VCOIN = 5 V VCOIN = open Design target value * Design target value * ILOAD = 1 mA
No. 6656-2/7
LB11981 Pin Functions
Pin No. 1 2 3 4 5 6 7 8 9 10 11, 12, 14 13 15 16 17 18 19 20 21 22 23 24 25 26, 27 28 Pin VCOIN CX LKC LAT INFR LKO GND BFGO RFS RF N.C UOUT VOUT WOUT N.C MCOM FC VCCM UIN VIN WIN VCC VREG TEST PCOUT Not connected Motor coil midpoint input. The coil voltage waveform is detected using this voltage as the reference level. Frequency characteristics correction. Closed loop oscillation in the current control system can be stopped by inserting a capacitor between this pin and ground. Motor drive output stage power supply Coil waveform detection comparator input These are connected to the outputs for each phase through internal 10 k resistors. Power supply Internal 5 V regulator output Test pin. This pin must be left open during normal operation. VCO circuit PLL output Motor driver output Function VCO circuit voltage input. Inputs the PCOUT pin voltage filtered by an RC circuit. The value of the capacitor between this pin and ground determines the operating frequency range and the minimum operating frequency of the VCO circuit. Connection for the lock detection circuit capacitor. The value of the capacitor between this pin and ground determines the lock state monitoring period. The lock detection circuit can be disabled by connecting this pin to ground. Lock detection circuit mode switching input Forward/reverse switching input Lock state detection signal. (A pull-up resistor is required.) Ground Motor back electromotive force detection FG output (3 phases combined). (A pull-up resistor is required.) Current limit sensing. The output current can be detected and current limiting applied by connecting this pin to the RF pin. Lowest potential of the motor driver output transistor. The value of the resistor between this pin and ground determines the current that flows in the output transistor. Not connected
No. 6656-3/7
LB11981 Pin Assignment
VCOIN
1
28 PCOUT 27 TEST2
CX
2
LKC
3
26 TEST1
LAT
4
25 VREG
INFR
5
24 VCC 23 WIN 22 VIN
LKO
6
GND
7
BFGO
8
LB11981
21 UIN 20 VCCM 19 FC 18 MCOM 17 N.C 16 WOUT 15 VOUT Top view
ILB00049
RFS RF N.C
9
10
11
N.C
12
UOUT N.C
13
14
No. 6656-4/7
LB11981 Truth Tables Pin 4 (LAT): Lock detection circuit mode switching
LAT OPEN "L" Mode Automatic recovery mode Output latched in the off state when lock detected.
Pin 5 (INFR): Motor rotation direction switching
INFR OPEN or "L" "H" Mode Forward Reverse
Pin 3 (LKC): Lock detection time setting capacitor connection
LKC GND Capacitor inserted Mode Disabled Enabled
Pin 6 (LKO): Lock state detection signal (A pull-up resistor is required.)
LKO "H" "L" State Lock not detected Lock detected
Lock Detection Time Setting (automatic recovery mode) [LKC pin]
4V
2V t1 t2 Output off period t3
Start of lock detection
ILB00050
The following formula gives the time, t1, from the point the motor speed is locked until the output is turned off. t1[s] = C [F] x 4 [V] / 1 [A] The output off time, t2, is as follows. t2[s] = C [F] x 2 [V] / 0.65 [A] The time, t3, following the output off state until the motor speed locked state is monitored, is as follows. t3[s] = C [F] x 2 [V] / 1 [A] When pin 4 (LAT) is low (output off latching mode), after the t1 period lock state monitoring, the output is turned off and the output is held in the off state until either the VCC or VCCM power supply is switched.
No. 6656-5/7
VREG 0.1 F VCCM
50 k MCOM Rotor position detection circuit UIN VIN WIN
BFGO
Thermal shutdown circuit
Mask circuit
Startup control circuit
Timing control circuit Switching drive circuit
TEST1
TEST2
Output drive circuit
UOUT VOUT WOUT 0.022 F
PLL
VCO
Divide-by-8 circuit
LB11981
560 k
PCOUT RF 200 Upper saturation prevention circuit + RFS VCC GND 0.5
VCOIN
0.47 F --
CX
0.01 F
0.1 F
FC
Lock detection circuit
Low-voltage cutoff circuit
5V REG
VREG 0.1 F
LKC
LAT
LKO INFR 50 k
Sample Application Circuit (Note that the values of the external components depend on the motor used.)
ILB00051
No. 6656-6/7
1 F
LB11981
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 April, 2001. Specifications and information herein are subject to change without notice. PS No. 6656-7/7

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