Ordering number : ENN6656A Monolithic Digital IC LB11981 Three-Phase Sensorless Motor Driver Applications Package Dimensions Refrigerator fan motors unit: mm Features 3222-HSOP28 (275 mil) 1.0 [LB11981] 15 0.5 7.6 5.6 28 1 14 0.8 2.7 0.2 0.3 1.8max • 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. 0.1 15.2 0.8 SANYO: HSOP28 (275 mil) Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Supply voltage 1 VCC max Supply voltage 2 VCC max Applied output voltage Conditions Ratings Unit 30 Power supply for output stage V 30 V VO max 30 V Applied input voltage VI max –0.3 to VCC + 0.3 V Maximum output current IO max 1.0 A Allowable power dissipation Pdmax 0.5 W Operating temperature Topr Independent IC –20 to +75 °C Storage temperature Tstg –55 to +150 °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 42001RM (OT) No. 6656-1/7 LB11981 Operating Conditions at Ta = 25°C Parameter Symbol Supply voltage 1 VCC Supply voltage 2 VCCM Conditions Ratings Unit *8 (5) to 28 V 8 to 28 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 = 25°C, VCC = VCCM = 18 V Parameter Symbol Supply current 1 ICC Supply current 2 ICCM Internal power supply VREF Conditions LKC = 5 V Ratings min typ Unit max 8.8 11 13.2 mA 480 600 720 µA 4.75 5.0 5.25 V Internal supply load regulation ∆VREF ILOAD = –5 mA 30 50 mV Output saturation voltage 1 VOSAT1 IO = 0.4 A, Source + Sink 1.4 1.7 V Output saturation voltage 2 VOSAT2 IO = 0.8 A, Source + Sink 2.0 2.4 V MCOM pin common-mode input voltage range PCOUT pin output current 1 VIC 0 IPCOU Source side PCOUT pin output current 2 IPCOD Sink side VCOIN pin input current IVCOIN VCOIN = 4 V Minimum VCO frequency fVCOmin Maximum VCO frequency fVCOmax VCOIN = 5 V VCOIN = open VCC – 2 V –120 –100 –80 µA 80 100 120 µA 1 2 µA 1 1.15 kHz 0.85 36 42 48 kHz 550 650 750 µA 11 14 17 µA 150 180 210 Maximum CX pin charge/discharge current Icxmax VCOIN = 5 V Minimum CX pin charge/discharge current Icxmin VCOIN = open Thermal shutdown circuit operating temperature TTSD Design target value * Thermal shutdown circuit hysteresis ∆TTSD Design target value * 15 BFGO pin output saturation voltage VsatFG ILOAD = 1 mA 0.2 °C °C 0.4 V [Lock Detection Circuit] LKC pin voltage threshold Vth 3.7 4 4.3 V Threshold level hysteresis ∆Vth 1.8 2 2.2 V LKC pin charge current Ichg V (LKC) = 0 V LKC pin discharge current Idis V (LKC) = 4.2 V LAT pin input current ILAT V (LAT) = 0 V, V (LKC)= 4.2 V VsatLKO ILOAD = 1 mA, V(LKC) = 4.2 V LKO pin saturation voltage 0.8 1 1.2 µA 0.52 0.65 0.78 µA 3.2 4 4.8 µA 0.2 0.4 V [Low-Voltage Cutoff Circuit] Low-voltage detection voltage Hysteresis VT VREG pin detection ∆VF 38 4 4.2 V 150 180 210 mV 38 43 48 µA [Forward/Reverse Circuit] INFR pin input current IINFR INFR pin high-level input threshold voltage VINH INFR pin low-level input threshold voltage VINL V (INFR) = 5 V 3.0 V 1.0 V Note: * Design target values are not tested. No. 6656-2/7 LB11981 Pin Functions Pin No. Pin 1 VCOIN 2 CX The value of the capacitor between this pin and ground determines the operating frequency range and the minimum operating frequency of the VCO circuit. 3 LKC 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. 4 LAT Lock detection circuit mode switching input 5 INFR Forward/reverse switching input 6 LKO Lock state detection signal. (A pull-up resistor is required.) 7 GND Ground 8 BFGO 9 RFS Current limit sensing. The output current can be detected and current limiting applied by connecting this pin to the RF pin. 10 RF 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. 11, 12, 14 N.C Not connected 13 UOUT 15 VOUT 16 WOUT 17 N.C 18 MCOM 19 FC 20 VCCM 21 UIN 22 VIN 23 WIN Function VCO circuit voltage input. Inputs the PCOUT pin voltage filtered by an RC circuit. Motor back electromotive force detection FG output (3 phases combined). (A pull-up resistor is required.) Motor driver output 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 kΩ resistors. 24 VCC Power supply 25 VREG Internal 5 V regulator output 26, 27 TEST Test pin. This pin must be left open during normal operation. 28 PCOUT VCO circuit PLL output No. 6656-3/7 LB11981 Pin Assignment 1 28 PCOUT CX 2 27 TEST2 LKC 3 26 TEST1 LAT 4 25 VREG INFR 5 24 VCC LKO 6 23 WIN GND 7 22 VIN BFGO 8 21 UIN RFS 9 20 VCCM RF 10 19 FC N.C 11 18 MCOM N.C 12 17 N.C UOUT 13 16 WOUT N.C 14 15 VOUT LB11981 VCOIN Top view ILB00049 No. 6656-4/7 LB11981 Truth Tables Pin 4 (LAT): Lock detection circuit mode switching LAT Mode OPEN Automatic recovery mode “L” Output latched in the off state when lock detected. Pin 5 (INFR): Motor rotation direction switching INFR Mode OPEN or “L” Forward “H” Reverse Pin 3 (LKC): Lock detection time setting capacitor connection LKC Mode GND Disabled Capacitor inserted Enabled Pin 6 (LKO): Lock state detection signal (A pull-up resistor is required.) LKO State “H” Lock not detected “L” Lock detected Lock Detection Time Setting (automatic recovery mode) [LKC pin] 4V 2V t1 t2 t3 Output off period 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 [µF] × 4 [V] / 1 [µA] The output off time, t2, is as follows. t2[s] = C [µF] × 2 [V] / 0.65 [µA] The time, t3, following the output off state until the motor speed locked state is monitored, is as follows. t3[s] = C [µF] × 2 [V] / 1 [µA] 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 0.1 µF 0.01 µF 0.47 µF 560 kΩ 50 kΩ VREG FC CX VCOIN PCOUT TEST2 TEST1 BFGO 1 µF LAT Mask circuit VCO LKO Switching drive circuit 50 kΩ + -- 200 Ω Divide-by-8 circuit Timing control circuit Lock detection circuit LKC PLL Startup control circuit Thermal shutdown circuit Rotor position detection circuit INFR Low-voltage cutoff circuit Upper saturation prevention circuit 5V REG WOUT VOUT UOUT WIN VIN UIN MCOM VCCM VREG GND VCC RFS RF 0.1 µF 0.1 µF 0.5 Ω 0.022 µF LB11981 Sample Application Circuit (Note that the values of the external components depend on the motor used.) Output drive circuit ILB00051 No. 6656-6/7 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