LB1945H_09

Ordering number : EN6193B Monolithic Digital IC LB1945H Overview PWM Current Control Type Stepping Motor Driver The LB1945H is a PWM current control type stepping motor driver. Feature • 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 (feed-through current prevention) • Built-in thermal shutdown circuit • Built-in noise canceler Specifications Parameter Absolute Maximum Ratings at Ta = 25°C Symbol VBB max IO peak IO max VCC max VIN max VE max Pd max Topr Tstg Mounted on a specified board * tw ≤ 20µs Conditions Ratings 30 1.0 0.8 6.0 -0.3 to VCC 1.0 1.9 -20 to +90 -55 to +150 Unit V A A V V V W °C °C 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 * Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. http://semicon.sanyo.com/en/network 30409 MS / 82799RM(KI) No.6193-1/7 LB1945H 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 Electrical Characteristics at Ta = 25°C, VBB = 24V, VCC = 5V, VREF = 5.0V Parameter Output Block Output stage supply current IBB ON IBB OFF Output saturation voltage VOsat1 VOsat2 VOsat3 VOsat4 Output leakage current IO1(leak) IO2(leak) Output sustain voltage Logic Block Logic supply current ICC ON ICC OFF Input voltage VIH VIL Input current IIH IIL Set current control threshold value Vref/Vsen VIH = 3.2V VIL = 0.8V I1 = 0.8V, I2 = 0.8V I1 = 3.2V, I2 = 0.8V I1 = 0.8V, I2 = 3.2V Reference current CR pin current Thermal shutdown temperature Temperature hysteresis width Iref ICR T-TSD Ts hys Vref = 5.0V, I1 = 0.8V, I2 = 0.8V CR = 1.0V Design guarantee value * 35 7 9.5 13.5 25.5 17.5 -1.0 170 40 50 10 10 15 30 25 I1 = 0.8V, I2 = 0.8V, ENABLE = 0.8V ENABLE = 3.2V 50 7 3.2 0.8 65 13 10.5 16.5 34.5 32.5 µA mA °C °C 70 10 92 13 mA mA V V µA µA VSUS 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 = VBB, sink VO = 0V, source L = 3.9mH, IO = 1.0A, Design guarantee value * -50 30 0.3 0.5 1.6 1.8 0.5 1.0 2.0 0.2 0.5 0.7 1.8 2.0 50 mA mA V V V V µA µA V Symbol Conditions min Ratings typ max Unit * Design guarantee value, Do not measurement. No.6193-2/7 LB1945H Package Dimensions unit : mm (typ) 3233B 2.4 15.2 (6.2) 28 15 Pd max -- Ta Specified board: 114.3×76.1×1.6mm3 glass epoxy board. Allowable power dissipation, Pd max -- W HEAT SPREADER 2.0 1.9 1.6 (4.9) 10.5 7.9 1.2 0.91 0.8 1 0.8 (0.8) 2.0 0.3 14 0.25 0.65 0.4 2.45max (2.25) 0 -20 0 20 40 60 80 90 100 Ambient temperature, Ta -- °C 2.7 0.1 SANYO : HSOP28H(375mil) Pin Assignment OUTA 1 OUTA 2 NC 3 NC 4 E1 5 D-GND 6 VBB1 7 28 OUTB 27 OUTB 26 NC 25 NC 24 VBB2 23 E2 22 D-GND LB1945H VCC 8 PHASE1 9 ENABLE1 10 IA2 11 IA1 12 VREF1 13 GND 14 21 CR 20 PHASE2 19 ENABLE2 18 IB2 17 IB1 16 VREF2 15 S-GND No.6193-3/7 Block Diagram OUTA 1 2 7 28 27 24 OUTA VBB1 OUTB OUTB VBB2 8 VCC PHASE1 9 Control logic ciruit Control logic ciruit 20 PHASE2 ENABLE1 10 19 ENABLE2 IA1 12 17 IB1 18 IB2 LB1945H IA2 11 Thermal shutdown circuit VREF1 13 Current select circuit Blanking time OSC Blanking time Current select circuit 16 VREF2 GND 14 15 S-GND 5 6 21 22 23 E1 D-GND CR D-GND E2 No.6193-4/7 LB1945H Truth Table ENABLE L L H PHASE H L − OUTA H L OFF OUTA L H OFF I1 L H L H I2 L L H H Output current Vref / (10 × RE) = IOUT Vref / (15 × RE) = IOUT × 2/3 Vref / (30 × RE) = IOUT × 1/3 0 Note: Output is OFF when ENABLE = H or when I1 = I2 = H. Pin Function Pin No. 7 24 5 23 2 1 27 28 14 15 6 22 21 13 16 9 20 Pin name VBB1 VBB2 E1 E2 OUTA OUTA OUTB OUTB GND S-GND D-GND D-GND CR VREF1 VREF2 PHASE1 PHASE2 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 10 19 12,11 17,18 8 ENABLE1 ENABLE2 IA1,IA2 IB1,IB2 VCC 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. Ground pin. Sense ground pin. Lower-side internal diode ground (anode). Output pins. 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. Function No.6193-5/7 LB1945H Application Circuit Example 1 OUTA L OUTB 28 L 2 OUTA 3 NC 4 NC 0.51Ω(1W) OUTB 27 NC 26 NC 25 VBB2 24 E2 23 D-GND 22 0.51Ω(1W) 5 E1 6 D-GND 7 VBB1 24V 47µF 10µF LB1945H 82kΩ 8 VCC 5V CR 21 820pF 9 PHASE1 Logic input PHASE2 20 ENABLE2 19 IB2 18 IB1 17 VREF2 16 S-GND 15 Logic input 10 ENABLE1 11 IA2 12 IA1 0.1µF Voltage from 1.5 to 5V can be applied. 13 VREF1 14 GND 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 LB1945H 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. SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of March, 2009. Specifications and information herein are subject to change without notice. PS No.6193-7/7