Ordering number : ENN*6193 LB1945H Monolithic Digital IC LB1945H PWM Current Control Type Stepping Motor Driver Preliminary Features Package Dimensions unit: mm 3233-HSOP28H [LB1945H] 15.3 0.65 6.2 2.7 10.5 15 4.9 28 7.9 • PWM current control (external excitation) • Load current digital selection (1–2, W1–2, and 2 phase excitation drives possible) • Built-in upper/lower diode • Simultaneous ON prevention function (feedthrough current prevention) • Built-in thermal shutdown circuit • Built-in noise canceler 1 14 0.3 0.1 2.5max 2.25 0.8 1.3 0.25 0.85 SANYO : HSOP28H Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum motor supply voltage Output peak current Output continuous current Logic supply voltage Logic input voltage range Emitter output voltage Allowable power dissipation Operating temperature Storage temperature Symbol VBB max I OPEAK I O max VCC max VIN max VE max Pd max Topr Tstg Conditions Ratings 30 1.0 0.8 6.0 –0.3 to VCC 1.0 1.9 –20 to +90 –55 to +150 tw ≤ 20 µs Ta = 25˚C, with specified substrate* Unit V A A V V V W °C °C * Specified substrate: 114.3 × 76.1 × 1.6 mm3, glass epoxy Allowable Operating Ranges at Ta = 25°C Parameter Motor supply voltage Logic supply voltage Reference voltage Symbol VBB VCC VREF Conditions Ratings 10 to 28 4.75 to 5.25 1.5 to 5.0 Unit V V 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 82799RM(KI) No. 6193-1/7 LB1945H Electrical Characteristics at Ta = 25°C, VBB = 24V, VCC = 5V, VREF = 5.0V Parameter Symbol Output Block Output stage supply current I BB ON I BB OFF V osat 1 V osat 2 V osat 3 V osat 4 I o1(leak) I o2(leak) V SUS I CC ON I CC OFF V IH V IL I IH I IL Vref/Vsen Output saturation voltage 1 2 3 4 Output leakage current Output sustain voltage Logic supply current Input voltage Logic Block Conditions Input current Set current control threshold value Reference current CR pin current Thermal shutdown temperature Temperature hysteresis width I1 = 0.8V, I2 = 0.8V, ENABLE = 0.8V ENABLE = 3.2V Io = +0.5A sink Io = +0.8A sink Io = –0.5A source Io = –0.8A source VO = V sink VO = 0V source L = 3.9 mH Io = 1.0A *1 I1 = 0.8V, I2 = 0.8V, ENABLE = 0.8V ENABLE = 3.2V V IH = 3.2V V IL = 0.8V I1 = 0.8V, I2 = 0.8V I1 = 3.2V, I2 = 0.8V I1 = 0.8V, I2 = 3.2V Vref = 5.0V, I1 = 0.8V, I2 = 0.8V CR = 1.0V I ref I CR T TSD ∆TTSD Ratings min 0.5 typ 1.0 0.3 0.5 1.6 1.8 –50 30 50.0 7.0 3.2 35 7 9.5 13.5 25.5 17.5 –1.0 max 2.0 0.2 0.5 0.7 1.8 2.0 50 70.0 10.0 92.0 13.0 50 10 10 15 30 25 0.8 65 13 10.5 16.5 34.5 32.5 170 40 Unit mA mA V V V V µA µA V mA mA V V µA µA µA mA °C °C *1: Assured design target value, not measured Truth Table ENABLE PHASE OUTA OUTA– L H H L L L L H H – OFF OFF I1 I2 Output current L L Vref / (10 × RE) = IOUT H L Vref / (15 × RE) = IOUT × 2/3 L H Vref / (30 × RE) = IOUT × 1/3 H H 0 Note: Output is OFF when ENABLE = H or when I1 = I2 = H. No. 6193-2/7 GND 14 VREF1 13 I A 2 11 I A 1 12 ENABLE1 10 PHASE1 9 Current select circuit Control logic circuit Blanking time OSC Thermal shutdown circuit VBB1 7 21 5 6 E1 D-GND CR OUTA– OUTA 2 1 23 22 D -GND E2 Blanking time OUTB– OUTB 28 27 Current select circuit Control logic circuit 24 VBB2 16 VREF2 18 I B2 17 I B1 19 ENABLE2 20 PHASE2 8 VCC LB1945H Block Diagram No. 6193-3/7 LB1945H Pin Assignment 1 28 OUTB– OUTA 2 27 OUTB NC 3 26 NC NC 4 25 NC E1 5 24 VBB2 D- GND 6 23 E2 VBB1 7 22 D- GND 8 21 CR 9 20 PHASE2 ENABLE1 10 19 ENABLE2 I A2 11 18 I B2 I A1 12 17 I B1 13 16 VREF2 14 15 S-GND OUTA– LB1945H VCC PHASE1 VREF1 GND Top view No. 6193-4/7 LB1945H Sample Application Circuit OUTB– 28 OUTB 27 NC 26 NC NC 25 5 E1 VBB2 24 6 D-GND E2 23 D-GND 22 1 OUTA– 2 OUTA 3 NC 4 L L 0.51Ω (1W) 7 VBB1 0.51Ω (1W) 24V 47µF LB1945H 10µF 82kΩ 8 VCC CR 21 Logic input 9 PHASE1 PHASE2 20 10 ENABLE1 ENABLE2 19 11 IA 2 IB 2 18 12 IA 1 IB 1 17 13 VREF1 VREF2 16 14 GND S-GND 15 0.1µF Logic input 820pF 5V Voltage from 1.5 to 5V can be applied. The fin on the bottom of HSOP-28H package and the fins between pins 7 and 8 and 21 and 22 should be grounded. No. 6193-5/7 LB1945H Pin Description Pin name Pin number VBB1 7 VBB2 24 E1 5 E2 23 OUTA 2 OUTA– 1 OUTB 27 OUTB– 28 GND 14 S–GND 15 D–GND 6 22 CR 21 VREF1 VREF2 PHASE1 PHASE2 13 16 9 20 ENABLE1 ENABLE2 10 19 IA1, IA2 IB1, IB2 VCC 12, 11 17, 18 8 Function Output stage power supply voltage pin. Cathode pin for the upper-side diodes. Insert resistor RE between these pins and ground to control set current. Output pins. Ground pin. Sense ground pin. Lower-side internal diode ground (anode) Triangular wave chopping with CR constant setting. Triangular wave OFF time is noise cancel time. Output current setting pins. (Output current is set by inputting a 1.5V to 7.5V voltage.) Output phase select input pin. High input: OUTA = H, OUTA– = L Low input: OUTA = L, OUTA– = H Output ON/OFF setting input pins. High input: output OFF Low input: output ON Output current setting digital input pins. Current is set to 1/3, 2/3, 1 by High and Low combinations. Logic block power supply voltage pin. Usage Notes 1. VREF pin Because the VREF pin is used as reference voltage input pin for the current setting, care must be taken to prevent noise from affecting the input. 2. GND pin Because this IC switches large currents, the ground pattern must be designed with care. The fin on the bottom of the package and the fins between pins 7 and 8 and 21 and 22 should be grounded. Low-impedance patterns should be used in blocks where large currents flow, and these blocks should be separated from low-level signal blocks. In particular, the ground of the sense resistor RE at pin E should be located close to the IC ground. Pattern layout should be designed so that the capacitors between VCC and ground and VBB and ground are close to VCC and VBB. No. 6193-6/7 LB1945H 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, 1999. Specifications and information herein are subject to change without notice. PS No. 6193-7/7