LB1838M-TRM-E

LB1838M-TRM-E ONSEMI | Alldatasheet

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© 2011, SCILLC. All rights reserved. www.onsemi.com Publication Order Number: Jan-2011, Rev. 0 LB1838M/D LB1838M Overview The LB1838M is a low-saturation two-channel bidirectional motor driver IC for use in low-voltage applications. The LB1838M is a bipolar stepper-motor driver IC that is ideal for use in printers, cameras and other portable devices. Functions

• Low voltage operation (2.5V min)
• Low saturation voltage (upper transistor + lower transistor residual voltage: 0.40V at 400mA)
• Built-in through-current prevention circuit
• Separate logic power supply and motor power supply
• Built-in spark killer diodes
• Built-in thermal shutdown circuit
• Compact package: MFP14S Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit VCC max -0.3 to +10.5 V Maximum supply voltage VS max -0.3 to +10.5 V Output applied voltage V OUT VS+VSF V Input applied voltage V IN -0.3 to +10 V Ground pin flow-out current I GND Per channel 1.0 A Independent IC 550 mW Allowable power dissipation Pd max Mounted on a specified board * 800 mW Operating temperature Topr -20 to +75 °C Storage temperature Tstg -40 to +125 °C * Specified board: 20mm × 30mm × 1.6mm, glass epoxy board. Monolithic Digital IC Low-Voltage, Low-Saturation Bidirectional Motor Driver

Rev. 0 | Page 2 of 5 | www.onsemi.com Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit VCC 2.5 to 9.0 V Supply voltage VS 1.8 to 9.0 V Input high-level voltage V IH 1.8 to 9.0 V Input Low-level voltage V IL -0.3 to +0.7 V Electrical Characteristics at Ta = 25°C, VCC = 3V Ratings Parameter Symbol Conditions min typ max Unit ICC0 ENA1,2 = 0V, V IN1 = 3V or 0V 0.1 10 μA Current drain ICC1 ENA1 = 3V, V IN1 = 3V or 0V 12 18 mA VOUT1 ENA = 3V, V IN = 3V or 0V, IOUT = 200mA 0.2 0.28 V Output saturation voltage VOUT2 ENA = 3V, V IN = 3V or 0V, IOUT = 400mA 0.4 0.6 V IIN V CC = 6V, VIN = 6V 200 μA Input current IENA V CC = 6V, ENA = 6V 200 μA Output sustaining voltage V O(SUS) I OUT = 400mA 9 V Spark killer diode Reverse current I S(leak) V CC1, VS = 7V 30 μA Forward voltage V SF I OUT = 400mA 1.7 V Package Dimensions unit : mm (typ) 3111A Pin Assignment VCC ENA1 OUT1 VS1 OUT2 IN1 GND Vcont 14 13 12 11 10 9 GND ENA2 OUT3 V S2 OUT4 IN2 LB1838M Note: Both GND pins should be connected to ground. SANYO : MFP14S(225mil) 8.0 0.15 (1.0) 1.0 0.35 1.7MAX (1.5)0.1 4.4 0.63 6.4 -20 0 20 40 60 80 1000 1000 800 600 400 200 Pd max -- Ta 550 330 480 Ambient temperature, Ta -- °C Allowable power dissipation, Pd max -- mW Independent IC With specified board Specified board: 20×30×1.5mm3 glass epoxy board.

Rev. 0 | Page 3 of 5 | www.onsemi.com Vcont IN OUT OUT M ID VZ VCC VS ID = VZ r 300Ω ( = Constant) Block Diagram VCC OUT3 VS1 OUT4 GND Vcont GND ENA2 VS2 IN2 60kΩ 80kΩ 60kΩ 80kΩ OUT1 OUT2 ENA1 IN1 60kΩ 80kΩ 60kΩ 80kΩ Stepping Motor 10μF Control blockControl block Thermal shutdown Note: As long as the voltages applied to VCC, VS1, VS2, ENA1, ENA2, IN1, and IN2 are within the limits set by the absolute maximum ratings, there are no restrictions on the relationship of each voltage level in comparison with the others (regarding which is higher or lower). (ex. VCC = 3V, VS1, 2 = 2V, ENA = IN = 5V) Truth Table IN1,2 ENA1,2 OUT1,3 OUT2,4 Mode L H H L Forward H H L H Reverse L L OFF OFF Standby H L OFF OFF Standby Vcont pin As shown in the left diagram, the Vcont pin outputs the voltage of the band gap Zener VZ +VF (= 1.93V). In normal use, this pin is left open. The drive current ID is varied by the Vcont voltage. However, because the band gap Zener is shared, it functions as a bridge.

Rev. 0 | Page 4 of 5 | www.onsemi.com VO(sat) -- IO IIN -- VIN VO(sat) -- Ta I S -- VS ICC -- VCC 1.0 0.8 0.6 0.4 0.2 200 160 120 0.6 0.5 0.3 0.2 0.1 0.4 0 100 200 300 400 500 600 0123456789 1 0 -40 -20 0 20 40 60 140 12010080 0123 7 6548 1 2 11109 0123 7 6548 1 2 11109 ENA IN1(ENA = 3V) IO = 400mA IO = 200mA VCC = VS = 3V VCC = VS = IN = 3V VO(sat) = total VCC = VIN = 3V For 1channel VCC = VIN = 3V For 1channel Output current, IO -- mA Output saturation voltage, VO(sat) -- V Input voltage, VIN -- V Input current, IIN -- μA Output saturation voltage, VO(sat) -- V Ambient temperature, Ta -- °C Current drain, IS -- mA Supply voltage, VS -- V Current drain, ICC -- mA Supply voltage, VCC -- V Reverse Forward

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