NJM3517 STEPPER MOTOR CONTROLLER / DRIVER n GENERAL DESCRIPTION n PACKAGE OUTLINE NJM3517 is a stepper motor controller/driver, which requires minimum of external components and drive currents up to 500mA. The NJM3517 is suited for applications requiring least-possible RFI. Operating in a bi-level drive mode can increase motor performance high voltage pulse is applied to the motor winding at the beginning of a step, in order to give a rapid rise of current. n FEATURES Internal complete driver and phase logic NJM3517E2(SOP16) Continuous-output current 2 x 350mA Half- and full-step mode generation LS-TTL-compatible inputs Bi-level drive mode for high step rates Voltage-doubling drive possibilities Half-step position-indication output Minimal RFI Packages SOP16 JEDEC 300mil n BLOCK DIAGRAM V V CC SS NJM3517 POR RC L Mono A F - F L B STEP DIR Phase P B2 Logic HSM P B1 P INH A2 P O A1 A O B GND Figure 1. Block diagramNJM3517 n PIN CONFIGURATIONS P 1 16 V B2 CC P 2 15 V B1 SS GND 3 14 L B P 4 13 L A1 A P 5 12 R A2 C DIR 6 11 INH STEP 7 10 HSM 8 9 B A Fugure 2.Pin configurations n PIN DESCRIPTION SOP Symbol Description 11 P Phase output 2, phase B. Open collector output capable of sinking max 500 mA. B2 22 P Phase output 1, phase B. Open collector output capable of sinking max 500 mA. B1 3 3 GND Ground and negative supply for both V and V . CC SS 44 P Phase output 1, phase A. A1 55 P Phase output 2, phase A. A2 6 6 DIR Direction input. Determines in which rotational direction steps will be taken. 7 7 STEP Stepping pulse. One step is generated for each negative edge of the step signal. 8 8 B Zero current half step position indication output for phase B. 9 9 A Zero current half step position indication output for phase A. 10 10 HSM Half-step mode. Determines whether the motor will be operated in half or full-step mot. When pulled low, one step pulse will correspond to a half step of the motor. 11 11 INH A high level on the inhibit input turns all phase output off. 12 12 RC Bi-level pulse timing pin. Pulse time is approximately t = 0.55 R C on T T 13 13 LA Second level (bi-level) output, phase A. 14 14 LB Second level (bi-level) output, Phase B. 15 15 V Second level supply voltage, +10 to +40 V. SS 16 16 V Logic supply voltage, nominally +5 V. CC