Stepping Motor Driver Series Microstep 36V Series Stepping Motor Driver No.12009EAT09 BD63860EFV Description BD63860EFV is a high-grade stepping motor driver with an internal 3-bit DAC, designed to drive bipolar stepping motors in eighth-step modes. The IC features several integrated protection circuits and achieves excellent thermal dissipation performance due to its low ON-resistance DMOS output transistors and high-dissipation power package. This IC is rated for 36 V maximum input voltage / 2.5 A maximum output current and employs a constant-current, PWM allowing for full-, half-, quarter- and eighth-step excitation modes. Additionally, the current decay mode can be freely set to a ratio of fast and slow decay, allowing the IC to adapt to the optimum control conditions for every motor. The single-power supply configuration allows for easy design and layout in the application. Features 1) Single power supply input (Vin max. 36 V) 2) Rated output current: 2.5 A (peak) 3) Low ON-resistance DMOS output (0.8 total across upper + lower FETs) 4) Serial/CLK-IN drive mode (integrated translator circuit) 5) PWM constant-current control (fixed chopping frequency) 6) Built-in spike noise cancel function (external noise filter is unnecessary) 7) Full-, half-, quarter- and eighth-step functionality 8) AUTO decay mode 9) Current decay mode switching function (linearly variable fast/slow decay ratio) 10) Normal rotation & reverse rotation switching function 11) Power-save function 12) Built-in logic input pull-down resistor 13) Power-on reset function 14) Thermal shutdown circuit (TSD) 15) Over-current protection circuit (OCP) 16) Under-voltage lockout circuit (UVLO) 17) Over-voltage lockout circuit (OVLO) 18) Ghost Supply Prevention (protects against malfunction when power supply is disconnected) 19) Micro-miniature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP package Applications Laser printers, multi-function printers, inkjet printers, scanners, mini printers, PPCs, photo printers, etc. www.rohm.com 2012.02 - Rev.A 1/8 2012 ROHM Co., Ltd. All rights reserved. Technical Note BD63860EFV Absolute maximum ratings (Ta = 25C) Parameter Symbol Limit Unit Supply voltage V -0.2 36.0 V CC1,2 *1 1.45 Power dissipation Pd W *2 4.7 Control pin input voltage V -0.2 7.0 V IN RNF maximum voltage V 1.0 V RNF *3 Maximum output current I 2.5 A / phase OUT Operating temperature range T -25 85 C opr Storage temperature range T -55 150 C stg Junction temperature T 150 C jmax *1 IC mounted on 70mm x 70mm x 1.6mm glass-epoxy board. Derated at 11.6 mW/C above Ta = 25C. *2 IC mounted on 4-layer recommended board. Derated at 37.6 mW/C above Ta = 25C. *3 Not to exceed Pd, ASO and Tjmax = 150C. Operating conditions (Ta = -25 85 C) Limit Parameter Symbol Unit Min Typ Max Supply voltage V 16 24 28 V CC1,2 *4 Output current(DC) I 1.5 1.7 A/phase OUT *4 Not to exceed Pd, ASO. Electrical characteristics (unless otherwise specified, Ta = 25C, Vcc1,2 = 24 V) Limit Item Symbol Unit Condition Min Typ Max Overall Device Circuit current at standby I - 0.4 2.0 mA PS = L CCST Circuit current I - 4.0 7.0 mA PS = H, VREF = 2 V CC Control inputs (PS, RESET, ENABLE, CLK, CW/CCW, MODE1, MODE2, SR) H level input voltage V 2.0 - 5.5 V INH L level input voltage V 0 - 0.8 V INL H level input current I 38 55 94 A V = 5.5 V INH IN L level input current I -10 0 - A V = 0 V INL IN Outputs (OUT1A, OUT1B, OUT2A, OUT2B) I = 1.5 A, OUT Output ON-resistance R - 0.8 1.0 total across top and bottom ON FET Output leak current I - - 10 A LEAK Current control RNF input current I -40 -20 - A RNF = 0 V RNF VREF input current I -2.0 -0.1 - A VREF = 0 V VREF VREF input voltage range V 0 - 3.2 V REF VCR input current I 60 100 140 A V = 3.3 V VCR VCR VCR input voltage range V 3.0 - 5.5 V VCR MTH input current I -2.0 -0.1 - A MTH = 0 V MTH MTH input voltage range V 0 - 3.5 V MTH Comparator threshold 1 V 0.212 0.250 0.288 V VREF = 2 V, 100% CTH1 Comparator threshold 2 V 0.142 0.177 0.212 V VREF = 2 V, 70.71% CTH2 Comparator threshold 3 V 0.076 0.096 0.116 V VREF = 2 V, 38.27% CTH3 Minimum on time t 0.21 0.54 0.92 s R=39k,C=1000pF ONMIN www.rohm.com 2012.02 - Rev.A 2/8 2012 ROHM Co., Ltd. All rights reserved.