Ordering number : ENN6518 Monolithic Linear IC LA6538T Single-Phase Full-Wave Fan Motor Driver LB1964T: 3 and 5 V operation, low saturation voltage switching single-phase bipolar drive, FG output LB11963T: 5 and 12 V operation, switching singlephase bipolar drive, restart circuit, lock detection, 1/2 FG output LB11964T: 5 and 12 V operation, switching singlephase bipolar drive, restart circuit, lock detection, FG output Package Dimensions unit: mm 3245-MSOP8 [LA6538T] 3.0 8 5 1 4 0.5 • BTL output single-phase full-wave linear drive (gain resistance: 180 to 500 kΩ, 360×) — Since this device generates no switching noise, it is optimal for fan drive in audio equipment, electronic games, and notebook personal computers. • Supports low-voltage operation and features a wide usable voltage range (VCC = 2.5 to 9.5 V). • Low saturation voltage output (Upper side + lower side saturation voltage: VOsat(total) = 0.2 V (typ), IO = 100 mA) — This device achieves a high coil efficiency for low current drain, and generates minimal heat in the IC itself. • Constant-voltage Hall bias output. — The Hall element is regulated at 2.1 V, and the device provides a stable Hall output with excellent temperature characteristics. • FG output — The LA6538T provides a speed detection output (an open-collector output). • Built-in thermal protection circuit — This circuit limits the drive current to prevent damage to or destruction of the IC when the IC chip temperature exceeds 180°C due to excessive output current caused by load shorting or other problem. T package (MSOP-8) series fan motor drivers 3.0 4.9 Functions and Features Reference materials: 0.65 (0.5) 0.25 0.25 (0.85) 1.1max The LA6538T is optimal for use as a fan motor driver in equipment, such as notebook personal computers and electronic game units, that requires miniaturization and low noise levels. This device achieves highly efficient single-phase bipolar fan motor drive by providing a low saturation voltage BTL output. • Ultraminiature package (MSOP-8: 3.0 × 4.9 × 0.93 mm3) — Allows the circuit board to be miniaturized and a large heat sink to be used. 0.08 Overview SANYO: MSOP8 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 83000RM (OT) No. 6518-1/6 LA6538T Pd max — Ta Allowable power dissipation, Pdmax — mW 600 Specified printed circuit board: 20.0 × 10.0 × 0.8 mm3 Paper phenolic board 500 Mounted on the specified printed circuit board 400 300 200 192 100 0 --20 0 20 40 60 80 Ambient temperature, Ta — °C 100 ILA00211 Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings VCC max Maximum supply voltage Allowable power dissipation Pd max Mounted on the specified printed circuit board* Unit 10 V 400 mW OUT pin output current IOUT max 0.3 A OUT pin output voltage handling VOUT max 9.5 V FG output voltage handling VFG max 10 V FG output current IFG max 5 mA Operating temperature Topr –20 to +90 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Note: * Specified printed circuit board: 20.0 × 10.0 × 0.8 mm3 paper phenolic board, wiring density: 20%. Recommended Operating Conditions at Ta = 25°C Parameter Symbol Conditions Supply voltage VCC 2.5 to 9.5 V Hall input common-mode input voltage range VICM 0.9 to VCC – 1 V Electrical Characteristics at Ta = 25°C, VCC = 5 V Parameter Symbol Ratings Conditions min typ Unit max Circuit current ICC IN– = 2.6 V, IN+ = 2.4 V, RL = ∞ 10 15 mA OUT pin output low-level voltage VOL IO = 100 mA 0.1 0.2 V OUT pin output high-level voltage VOH IO = 100 mA 0.1 0.2 V Hall bias voltage VHB RH = 360 Ω + 91 Ω 2.1 2.3 V 1.9 Hall amplifier gain VG 47 50 53 dB Hall amplifier input resistance VINR 400 500 620 Ω FG output low-level voltage VFG IFG = 3 mA 0.2 0.3 V FG output leakage current IFGL VFG = 7 V 30 µA Thermal protection circuit T-TSD 200 °C Design guarantee* 150 180 Note: * Design guarantee: Indicates a design target value. These parameters are not tested in the independent IC. Truth Table IN– IN+ OUT1 OUT2 FG H L H L L L H L H off — — off off — Mode Motor operating Thermal protection activated No. 6518-2/6 LA6538T Pin Assignment IN+ 1 8 FG HB 2 7 VCC IN-- 3 6 OUT2 OUT1 4 5 GND LA6538T Top view ILA00206 Sample Application Circuit VCC Di Cr *4 VCC *1 *3 FG R2 HB *2 H IN-- OUT1 IN+ OUT2 R1 H R2 GND Devices on the printed circuit board ILA00207 ILA00208 Notes: 1. When the diode Di is used to prevent device destruction from reverse connection, the capacitor Cr must be inserted to assure a path for regenerative currents. Similarly, if there are no nearby capacitors on the fan power supply line, the capacitor Cr is also required to increase reliability. 2. The Hall element is biased at a constant voltage of approximately 2.1 V from the HB pin. Thus the LA6538T provides a stable Hall output with excellent temperature characteristics. The resistor R1 adjusts the Hall output amplitude. The LA6538T implements linear drive by amplifying the Hall output and applying voltage control to the motor coils. Startup characteristics and efficiency are improved by using a higher Hall device output. However, the motor can be made to operate more quietly by adjusting the Hall device. 3. If the Hall bias is taken from VCC, bias the Hall device at 1/2 VCC as shown in the figure. 4. This pin must be left open if unused. Block Diagram VCC FG 2.1 VRG 180 kΩ 180 kΩ HB IN+ H 500 Ω OUT1 OUT2 500 Ω IN-- GND ILA00209 No. 6518-3/6 LA6538T Timing Chart Hall Signal OUTPUT Coil Current FG Pulse ILA00210 No. 6518-4/6 LA6538T 8 6 4 2 0 ) PN N T1 ( U O ) to T2 ) l NP ta 0.3 (P T1 OU 0.2 0.1 12 0 0.3 PN P 3V 0.2 0.1 400 0 ILA00213 0.5 V V OUT1 npn (lower side) N5 Output saturation voltage, VO(sat) — V PN P5 V PN P8 V 0.5 300 VO(sat) — IO 0.6 OUT2 pnp (upper side) 0.4 200 Output current, IO — mA VO(sat) — IO 0.6 100 ILA00212 N8 10 NP 8 NP 6 0.4 0.3 V 4 N3 2 Supply voltage, VCC — V 0.2 0.1 0 0 100 200 300 400 Output current, IO — mA 0 100 Saturation voltage, VFG(sat) — V H 300 400 ILA00215 VFG(sat) — IFG 0.6 VCC = 5 V FG = “H” 200 Output current, IO — mA ILA00214 FG Threshold Level VFG (N PN ) NP (P 0.4 0 0 Output saturation voltage, VO(sat) — V 0.5 T2 + =L IN 10 IN-- = IN+ = 1/2 VCC 0.6 OU 12 VCC = 8.5 V NP Current drain, ICC — mA IN-- = IN+ = HB Output saturation voltage, VO(sat) — V -- = L IN 16 14 VO(sat) — IO 0.7 OU ICC — VCC 18 0.5 0.4 0.3 0.2 5V 9V 3V 0.1 FG = “L” L 0 0 1 2 Output voltage, VOUT2 — V 3 4 5 6 7 8 9 10 ILA00217 Gain Characteristics 6 VCC = 5 V 1/2 VCC bias 5 9V Output voltage, VO — V 3V 2.0 2 FG supply current, IFG — mA VCC = 5 V 2.4 1 ILA00216 VHB — IHB 2.8 Hall bias voltage, VHB — V 0 3 5V 1.6 1.2 0.8 4 3 2 1 0.4 0 0 2 4 6 Hall bias current, IHB — mA 8 10 ILA00218 0 --40 --30 --20 --10 0 10 (IN--) — (IN+) -- mV 20 30 40 ILA00219 No. 6518-5/6 LA6538T 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 August, 2000. Specifications and information herein are subject to change without notice. PS No. 6518-6/6