Datasheet 36V Stepping Motor Driver BD68620EFV General Description Major Characteristics BD68620EFV is a bipolar low-consumption driver that Range of power supply 1928 V driven by PWM current. Rated power supply voltage of voltage the device is 36 V, and rated output current is 2.0A. Rated output current 2.0 A PALA-IN driving mode is adopted for input interface. In (peak value) terms of current decay, the FAST DECAY/SLOW Range of operating -25+85 DECAY ratio may be set without any limitation, and all temperature available modes may be controlled in the most appropriate way. In addition, the power supply may be Output ON resistance 0.95 (Typ.) driven by one single system, which simplifies the (total of upper and design. lower resistors) Package W(Typ.) x D(Typ.)x H(Max.) Features HTSSOP-B24 7.80mm x 7.60mm x 1.00mm Rated output currentDC2.0A Low ON resistance DMOS output PALA-IN drive mode PWM constant current (other oscillation) Built-in spike noise cancel function (external noise filter is unnecessary) Full-, half (two kinds)-, quarter-step functionality Current decay mode switch linearly variable FAST/SLOW DECAY ratio Power save function Built-in logic input pull-down resistor Thermal shutdown circuit (TSD) Over-current protection circuitOCP Under voltage lock out circuit (UVLO) Basic application circuit Over voltage lock out circuit (OVLO) Ghost Supply Prevention (protects against GND PHASE1 12 18 malfunction when power supply is disconnected) 13 PHASE2 Microminiature, ultra-thin and high heat-radiation 14 I01 (exposed metal type) package 11 PS I11 15 16 I02 Application I12 17 PPC, multi-function printer, laser beam printer, and ink-jet printer Monitoring camera and WEB camera VCC1 5 Sewing machine VREF 9 OUT1A Photo printer, FAX, scanner and mini printer 4 Toy and robot 2 OUT1B 3 RNF1 VCC2 20 OUT2A CR 22 7 24 OUT2B 23 RNF2 MTH 8 GND 1 Figure 1. BD68620EFV application circuit diagram Product structuresilicon monolithic integrated circuit It is not the radiation-proof design for this product. www .rohm.com TSZ02201-0P2P0B700140-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/19 TSZ2211114001 30.May.2014 Rev.002DatasheetDatasheet BD68620EFV Terminals Configuration Diagram TOP VIEW Block Diagram 1 24 GND OUT2B PHASE1 12 TSD OCP 13 PHASE2 GND 2 23 RNF2 18 OUT1B OVLO UVLO I01 14 Translator I11 15 RESET 11 PS RNF1 3 22 OUT2A 16 I02 17 I12 OUT1A 4 21 N.C. VREF 9 2bit DAC VCC1 5 20 VCC2 VCC1 5 6 19 N.C. N.C. OUT1A 4 RNF1S 2 OUT1B 7 18 CR GND 3 RNF1 RNF2S I12 17 8 MTH Blank time PWM control VCC2 20 9 16 VREF I02 OUT2A CR 22 7 OSC 24 I11 OUT2B 15 N.C. 10 23 Mix decay RNF2 MTH 8 control PS 11 14 I01 Regulator GND 1 PHASE1 12 13 PHASE2 Figure 3. BD68620EFV Block Diagram Figure 2. Terminals Configuration Diagram Descriptions on Terminals NO. Designation Function NO. Designation Function 1 GND Ground terminal 13 PHASE2 Phase selection terminal 2 OUT1B H bridge output terminal 14 I01 VREF division ratio setting terminal Connection terminal of resistor for 3 RNF1 15 I11 VREF division ratio setting terminal output current detection 4 OUT1A H bridge output terminal 16 I02 VREF division ratio setting terminal 5 VCC1 Power supply terminal 17 I12 VREF division ratio setting terminal 6 N.C. Non connection 18 GND Ground terminal Connection terminal of CR for 7 CR 19 N.C. Non connection setting chopping frequency 8 MTH Current decay mode setting t 20 VCC2 Power supply terminal Output current value setting 9 VREF 21 N.C. Non connection terminal 10 N.C. Non connection 22 OUT2A H bridge output terminal Connection terminal of resistor for 11 PS Power save terminal 23 RNF2 output current detection 12 PHASE1 Phase selection terminal 24 OUT2B H bridge output terminal www.rohm.com TSZ02201-0P2P0B700140-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/19 TSZ2211115001 30.May.2014 Rev.002 Control logic Predriver