Ordering number : EN5979A LB1998 Monolithic Digital IC LB1998 Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive Overview Package Dimensions The LB1998 is a three-phase brushless motor driver especially suited for CD-ROM spindle motor drives. unit: mm 3234-HSOP28HC [LB1998] 15.3 10.5 4.9 1 1.3 0.25 0.8 0.3 0.1 2.5max 2.25 0.85 SANYO : HSOP28HC Pd max – Ta 2.0 Allowable power dissipation, Pd max – W • 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 15 7.9 28 0.65 6.2 2.7 Functions With substrate (114.3 mm×76.1 mm×1.6 mm3) 1.8 1.6 1.2 1.08 0.8 IC only 0.79 0.474 0.4 0 –25 0 25 50 Ambient temperature, Ta – °C 75 100 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 = 25°C Parameter Power supply voltage Symbol Conditions Ratings Unit VCC1 max 7.0 V VCC2 max 14.4 V VCC3 max 14.4 V Applied output voltage VO max 14.4 V Applied intput voltage VIN max VCC1 V Output current IO max Allowable power dissipation Pd max 1.3 A IC only 0.79 W with substrate (114.3 × 76.1 × 1.6 mm3, glass exposy) 1.80 W Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Operating Conditions at Ta = 25°C Parameter Power supply voltage Symbol Conditions Ratings VCC1 VCC2 ≥VCC1 Unit 4 to 6 V 4 to 13.6 V Sample Application at Ta = 25°C Parameter 12V type Symbol Conditions VCC1 Regulated voltage VCC2 Unregulated voltage Ratings Unit 4 to 6 V 4 to 13.6 V No. 5979-2/9 LB1998 Electrical Characteristics at Ta = 25°C, VCC1 = 5V, VCC2 = 12V Parameter Ratings Conditions Symbol min typ Unit max [Power supply current] Power supply current Output idle current ICC1 VCIN = VCREF 8 ICC2 VCIN = VCREF 250 mA 300 mA µA µA ICC1OQ VS/S = 0V 200 ICC2OQ VS/S = 0V 60 [Output] Saturation voltage, upper side 1 VOU1 IO = –0.5A, VCC1 = 5V, VCC2 = 12V Saturation voltage, lower side 1 VOD1 IO = 0.5A, VCC1 = 5V, VCC2 = 12V Current limiter setting voltage VCL RRF = 0.25Ω 1.0 V 0.3 V 0.25 V [Hall amplifier] Common mode input voltage range 1.2 VHCOM Input bias current IHIB Minimum Hall input level VHIN 60 High level voltage VS/SH 2.0 Low level voltage VS/SL VCC1–1.0 V µA 1 mVP-P [S/S pin] VCC1 V 0.7 V 200 µA Input current IS/SI VS/S = 5V Leak current IS/SL VS/S = 0V IVC VCIN = VCREF = 1.65V 1 µA VCREF pin input current IVCREF VCIN = VCREF = 1.65V 1 µA Voltage gain GVCO ∆VRF/∆VC, Note 1 Startup voltage VCTH VCREF = 1.65V, Note 1 1.55 1.85 V ∆VCTH VCREF = 1.65V, Note 1 100 200 mV +8 mV µA –30 [Control] VCIN pin input current Startup voltage width 0.25 times [Gain switching amplifier] Input offset voltage VGCOFFSET OPEN LOOP voltage gain GVGC Same-phase input voltage range VGCOM Design target value –8 f = 10 kHz, Design target value 43 0 dB 3.5 V [Hall power supply] Hall power supply voltage VH Allowable current IH IH = 5 mA 0.8 V 20 mA [Thermal shutdown] Operating temperature Hysterisis TTSD Design target value ∆TTSD Design target value 150 180 210 °C °C 15 [Short braking] Brake pin at High level VBRH 4 5 V Brake pin at Low level VBRL 0 1 V FGSEL pin at High level VFSH 4 5 FGSEL pin at Low level VFSL 0 1 Analog switch at High level RINH VCC–0.5 VCC1 Analog switch at Low level RINL 0 0.2 [1 Hall FG/3 Hall FG switching] [Gain switching analog switch] 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 Phase W –> Phase V 1 Control U V W H H L 2 H L L L H L H L H L H H H Phase U –> Phase W Phase V –> Phase W 3 L 4 Phase V –> Phase U Phase V –> Phase U 5 Phase U –> Phase V Phase U –> Phase W 6 L H L H L Phase W –> Phase V Phase U –> Phase V H L Phase V –> Phase W Phase W –> Phase U VCIN Phase W –> Phase U H L H L H L Input: 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 VCIN > VCREF VCIN < VCREF L, OPEN Foward Reverse brake H Foward Short brake Pin Assignment VCIN 1 28 ROUT3 RIN1 2 27 ROUT2 RIN2 3 26 ROUT1 RIN3 4 25 FGSEL SIG GND 5 24 FC S/S 6 23 VCREF BRAKE 7 22 WOUT PWR GND LB1998 PWR GND FG 8 21 VOUT RS 9 20 UOUT VH 10 19 VCC2 WIN1 11 18 RF WIN2 12 17 VCC1 VIN1 13 16 UIN2 VIN2 14 15 UIN1 Top view A11194 No. 5979-4/9 VH WIN2 WIN1 VIN2 VIN1 UIN2 UIN1 VCC1 + – Hall power supply Rotation direction detector FG RS FGSEL 1 Hall FG/ 3 Hall FG Forward/ reverse Waveform distributor + – + – – + – + – + FC + – S/S Reference voltage Thermal shutdown Current limiter FRAME GND – + – + Gain switching amplifier Short brake/ reverse brake switching RIN3 ROUT3 RIN2 ROUT2 RIN1 ROUT1 VCIN VCREF BRAKE A11193 PWR GND WOUT VOUT UOUT RF VCC2 LB1998 Block Diagram Matrix No. 5979-5/9 LB1998 Sample Application Circuit Control voltage 1 VCIN ROUT3 28 2 RIN1 ROUT2 27 3 RIN2 ROUT1 26 4 RIN3 FGSEL 25 Gain switching SW(0V or VCC1) Gain switching SW(0V or VCC1) Gain switching SW(0V or VCC1) Applying VCC1 to each pin activates load between ROUT-VCIN 1/3 Hall FG switching 5 SIG GND FC 24 0V or Open:1 Hall FG :3 Hall FG VCC1 0.1µF S/S 6 S/S VCREF 23 7 BRAKE WOUT 22 Control reference voltage Brake mode switching 0.1µF LB1998 PWR GND PWR GND FG output 8 FG VOUT 21 9 RS UOUT 20 10 VH VCC2 19 0.1µF Reverse detection 0.1µF Motor power supply voltage 12V 0.1µF 0.033µF 0.033µF 11 WIN1 RF 18 12 WIN2 VCC1 17 13 VIN1 UIN2 16 14 VIN2 UIN1 15 Power supply voltage 5V 0.1µF 0.033µF Hall element A11195 No. 5979-6/9 LB1998 Pin Descriptions Pin number 19 Pin name VCC2 17 VCC1 9 RS Pin voltage Equivalent circuit Pin function Source side predrive voltage and constant current control amplifier voltage supply pin 4V to 13.6V 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 4V to 6V VCC1 10 kΩ 100µA 8 9 1 Hall or 3 Hall element waveform 8 Schmitt comparator combined output FG A11196 15 16 UIN1 UIN2 13 VIN1 VIN2 1.2V to VCC1–1V 200Ω 15 200Ω 25µA 11 12 14 V phase Hall element input and 16 reverse detector V phase Schmitt comparator input pin Logic High indicates VIN1 > VIN2. 25µA 11 13 14 12 U phase Hall element input and reverse detector U phase Schmitt comparator input pin Logic High indicates UIN1 > UIN2. VCC1 25µA A11197 WIN1 WIN2 VCC1 75µA 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 10 10 VH 30 kΩ 2 kΩ A11198 VCC1 75 kΩ 6 S/S 0V to WCC1 6 50 kΩ 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. A11199 5 GND pin for all circuits except output SIG GND VCC1 2 kΩ 24 FC 24 20 kΩ Control loop frequency compensator pin. Connecting a capacitor between this pin and GND prevents closed loop oscillation in current limiting circuitry. 5 kΩ A11200 Continued on next page No. 5979-7/9 LB1998 Continued from preceding page Pin number Pin name Pin voltage Equivalent circuit Pin function VCC1 15µA 25µA 25µA 15µA Control reference voltage supply pin. Determines control start voltage. 68 kΩ 23 VCREF 200Ω 0V to 3.5V 23 A11201 VCC1 6µA 1 VCIN 0V to 3.5V 6µA 6µA 200Ω 1 23 6 pF Speed control voltage supply pin V type control technique VC > VCREF : Forward VC < VCREF : Slowdown (Reverse-blocking circuit prevents reverse rotation.) A11202 22 W phase output Output transistor GND WOUT PWR GND 21 VOUT 20 UOUT VCC2 18 3.9Ω 20 21 22 3.9Ω 18 RF PWRGND A11203 VCC1 75 kΩ 25 25 FGSEL 50 kΩ 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 VCC1 100µA 75 kΩ 7 BRAKE 3 50 kΩ 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 2 Pin name Pin voltage Equivalent circuit Pin function Gain switching selector pin When set to High (VCC1), resistor connected between ROUT1 and VCIN is selected as negative feedback resistor. RIN1 VCC1 3 RIN2 0 to VCC1 Low: 0V High: VCC1 26 27 28 10 kΩ 2 3 4 4 RIN3 26 ROUT1 27 ROUT2 28 ROUT3 A11206 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. 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