LB1945H SANYO | Alldatasheet

Document overview

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Technical content

Features

  • 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 82799RM(KI) Ordering number : ENN*6193 Monolithic Digital IC PWM Current Control Type Stepping Motor Driver [LB1945H] SANYO : HSOP28H Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum motor supply voltage V BB max 30 V Output peak current I OPEAK tw £ 20 ms 1.0 A Output continuous current I O max 0.8 A Logic supply voltage V CC max 6.0 V Logic input voltage range V IN max –0.3 to VCC V Emitter output voltage V E max 1.0 V Allowable power dissipation Pd max Ta = 25˚C, with specified substrate* 1.9 W Operating temperature Topr –20 to +90 °C Storage temperature Tstg –55 to +150 °C Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit Motor supply voltage V BB 10 to 28 V Logic supply voltage V CC 4.75 to 5.25 V Reference voltage V REF 1.5 to 5.0 V 6.2 28 15 11 4 0.8 15.3 2.7 0.3 4.9 1.3 10.5 0.65 0.25 0.85 7.92.25 2.5max 0.1 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 * Specified substrate: 114.3 · 76.1 · 1.6 mm3, glass epoxy

No. 6193-2/7 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 HH 0 Electrical Characteristics at Ta = 25°C, VBB = 24V , VCC = 5V , VREF = 5.0V Parameter Symbol Conditions Ratings Unitmin typ max I BB OFF ENABLE = 3.2V 0.2 mA Output saturation voltage 1 V osat 1 Io = +0.5A sink 0.3 0.5 V 2 V osat 2 Io = +0.8A sink 0.5 0.7 V 3 V osat 3 Io = –0.5A source 1.6 1.8 V 4 V osat 4 Io = –0.8A source 1.8 2.0 V Output leakage current I o1(leak) V O = V sink 50 mA I o2(leak) VO = 0V source –50 mA Output sustain voltage V SUS L = 3.9 mH Io = 1.0A *1 30 V I CC OFF ENABLE = 3.2V 7.0 10.0 13.0 mA Input voltage V IH 3.2 V V IL 0.8 V Input current I IH V IH = 3.2V 35 50 65 mA I IL V IL = 0.8V 7 10 13 mA Set current control threshold Vref/Vsen I1 = 0.8V, I2 = 0.8V 9.5 10 10.5 value I 1 = 3.2V, I2 = 0.8V 13.5 15 16.5 I1 = 0.8V, I2 = 3.2V 25.5 30 34.5 CR pin current I CR CR = 1.0V –1.0 mA Thermal shutdown temperature T TSD 170 °C Temperature hysteresis width DTTSD 40 °C *1: Assured design target value, not measured Output BlockLogic Block Truth Table ENABLE PHASE OUTA OUTA – LH HL LL LH H – OFF OFF Note: Output is OFF when ENABLE = H or when I1 = I2 = H.

No. 6193-3/7 Block Diagram 1 2 7 28 27 23222165 Control logic circuit Thermal shutdown circuit Current select circuit OSC Blanking time VBB224 Current select circuit Control logic circuit Blanking time PHASE1 ENABLE2ENABLE 1 IA2 IA1 VBB1OUTA OUTB –OUTA – VCC PHASE2 IB 1 IB 2 GND VREF1 VREF2 CR OUTB D-GND D -GND

No. 6193-4/7 Pin Assignment LB1945H OUTA – OUTA NC D- GND NC VBB1 VCC PHASE1 ENABLE1 IA 2 IA 1 VREF1 GND S-GND VREF2 IB 1 IB 2 ENABLE2 PHASE2 CR VBB2 NC OUTB – OUTB NC D- GND Top view

No. 6193-5/7 Sample Application Circuit 28OUTA– OUTA NC D-GN D NC VBB1 VCC PHASE1 ENABLE1 IA 2 IA 1 VREF 1 GND S-GND VREF2 IB 1 IB 2 ENABLE2 PHASE2 C R VBB2 NC OUTB – OUTB NC D-GND Logic input Voltage from 1.5 to 5V can be applied. 0.1µF Logic input 10µF 24V 47µF 0.51Ω (1W) 0.51Ω LL 82kΩ 820pF (1W) LB1945H 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. 6193-6/7 Pin Description Pin name Pin number Function VBB 1 7 Output stage power supply voltage pin. VBB 2 24 Cathode pin for the upper-side diodes. E1 5 Insert resistor R E between these pins and ground to control set current. E2 23 OUTA 2 Output pins. OUTA – 1 OUTB 27 OUTB – 28 GND 14 Ground pin. S–GND 15 Sense ground pin. D–GND 6 Lower-side internal diode ground (anode) CR 21 Triangular wave chopping with CR constant setting. Triangular wave OFF time is noise cancel time. VREF 1 13 Output current setting pins. VREF 2 16 (Output current is set by inputting a 1.5V to 7.5V voltage.) PHASE1 9 Output phase select input pin. PHASE2 20 High input: OUTA = H, OUTA – = L Low input: OUTA = L, OUTA– = H ENABLE1 10 Output ON/OFF setting input pins. ENABLE2 19 High input: output OFF Low input: output ON IA1, IA2 12, 11 Output current setting digital input pins. IB1, IB2 17, 18 Current is set to 1/3, 2/3, 1 by High and Low combinations. VCC 8 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 R E 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. 6193-7/7 This catalog provides information as of August, 1999. Specifications and information herein are subject to change without notice. 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. PS