Datasheet 36V 2ch Stepping Motor Driver BD68888AEKV General Description Key Specifications BD68888AEKV is a bipolar low-consumption driver that Range of Power Supply Voltage 8 V to 28 V driven by PWM constant current. Rated power supply Rated Output Current 1.5 A voltage of the device is 36 V, and rated output current is Range of Operating Temperature -25 C to +85 C 1.5 A. PARA-IN drive mode is adopted for input interface. Output ON Resistance 1.0 (Typ) This motor driver can drive 2ch bipolar stepping motors. (total of upper and lower resistors) In addition, the power supply can be driven by one single system, which simplifies the design. Package W(Typ) x D(Typ)x H(Max) Features HTQFP48V 9.00 mm x 9.00 mm x 1.00 mm Two bipolar stepping motors can be driven Rated Output Current 1.5 A Low ON Resistance DMOS Output PARA-IN Drive Mode correspondence PWM Constant Current control (the other excitation method) Built-in Spike Noise Blanking Function (external noise filter is unnecessary) Full-, Half (two kinds)-, Quarter-step correspondence Power Save Function Built-in Logic Input Pull-down Resistor Typical Application Circuit Thermal Shutdown Circuit (TSD) Over-current Protection Circuit (OCP) Under Voltage Lockout Circuit (UVLO) Over Voltage Lockout Circuit (OVLO) Ghost Supply Prevention (protects against OUT1A PHASE1 malfunction when power supply is disconnected) PHASE2 OUT1B I01 I11 SENSE1 Application I02 Monitoring Camera, WEB Camera, PPC, I12 VBB1 Multi-function Printer, Laser Beam Printer, Ink-jet Printer, Sewing Machine, Photo Printer, FAX, OUT2A Scanner, Mini Printer, Toy and Robot OUT2B VREF1 SENSE2 VREF2 VREF3 OUT3A VREF4 OUT3B SENSE3 PHASE3 VBB2 PHASE4 I03 OUT4A I13 I04 OUT4B I14 SENSE4 PS GND GND Figure 1. BD68888AEKV Application Circuit Diagram Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0P2P0C701580-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/20 TSZ2211114001 17.May.2018 Rev.001 BD68888AEKV Pin Configuration Block Diagram TOP VIEW PHASE1 Regulator PHASE2 RESET UVLO I01 Interface I11 OVLO I02 I12 TSD OCP VREF1 36 35 34 33 32 31 30 29 28 27 26 25 2bit DAC VREF2 VBB1 SENSE1 I13 37 24 I14 OUT1A OUT1B SENSE2 I12 38 23 NC Blank time SENSE1 PWM control Control PPrree-- I11 39 22 PHASE1 logic ddrriivveerr VBB1 GND 40 21 PHASE2 OSC OUT2A NC 41 20 GND OUT2B Mix decay NC 42 19 VREF4 control SENSE2 43 18 TEST1 VREF3 VREF3 2bit DAC VREF4 TEST2 44 17 VREF2 SENSE3 VBB2 I01 45 16 VREF1 EXP-PAD OUT3A SENSE4 OUT3B I02 46 15 PS Blank time SENSE3 PWM control I03 47 14 PHASE3 Control PPrree-- logic ddrriivveerr PHASE4 I04 48 13 VBB2 OSC OUT4A OUT4B 1 2 3 4 5 6 7 8 9 10 11 12 Mix decay SENSE4 control PHASE3 PHASE4 I03 Interface I13 GND I04 I14 PS GND Figure 2. Pins Configuration Diagram Figure 3. BD68888AEKV Block Diagram Pin Descriptions Pin Pin Pin Name Function Pin name Function No. No. NC NC 1 Non connection 25 Non connection NC NC 2 Non connection 26 Non connection 3 OUT1A H bridge output pin 27 OUT4A H bridge output pin Connection pin of resistor for output Connection pin of resistor for output SENSE1 SENSE4 4 28 current detection current detection 5 OUT1B H bridge output pin 29 OUT4B H bridge output pin NC 6 VBB1 Power supply pin 30 Non connection NC 7 Non connection 31 VBB2 Power supply pin 8 OUT2B H bridge output pin 32 OUT3B H bridge output pin Connection pin of resistor for output Connection pin of resistor for output SENSE2 SENSE3 9 33 current detection current detection 10 OUT2A H bridge output pin 34 OUT3A H bridge output pin 11 NC Non connection 35 NC Non connection 12 NC Non connection 36 NC Non connection 13 PHASE4 Phase selection pin 37 I13 VREF division ratio setting pin 14 PHASE3 Phase selection pin 38 I12 VREF division ratio setting pin 15 PS Power save pin 39 I11 VREF division ratio setting pin 16 VREF1 Output current value setting pin 40 GND Ground pin NC 17 VREF2 Output current value setting pin 41 Non connection NC 18 VREF3 Output current value setting pin 42 Non connection TEST1 Pin for testing 19 VREF4 Output current value setting pin 43 TEST2 20 GND Ground pin 44 Pin for testing 21 PHASE2 Phase selection pin 45 I01 VREF division ratio setting pin 22 PHASE1 Phase selection pin 46 I02 VREF division ratio setting pin 23 NC Non connection 47 I03 VREF division ratio setting pin 24 I14 VREF division ratio setting pin 48 I04 VREF division ratio setting pin The EXP-PAD of the center of - EXP-PAD - - - product connect to GND. www.rohm.com TSZ02201-0P2P0C701580-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/20 TSZ2211115001 17.May.2018 Rev.001 NC NC NC NC OUT1A OUT3A SENSE1 SENSE3 OUT3B OUT1B VBB2 VBB1 NC NC OUT4B OUTE2B SENSE4 SENSE2 OUT4A OUT2A NC NC NC NC