NJW4350D Nisshinbo

NJW4350 UNIPOLAR STEPPER MOTOR DRIVER GENERAL DESCRIPTION PACKAGE OUTLINE The NJW4350 is a high efficiency DMOS unipolar stepper motor driver IC. Low Ron DMOS driver realizes high power efficiency and low heat generation of a stepper motor application. The motor can be controlled by step and direction pulse input which makes the programming task of a micro controller simple and easy. Enhanced control feature, Motor Origin output, INH and NJW4350D RESET, make the NJW4350 applicable for a wide range of stepper motor applications. FEATURES Wide Voltage Range 5 to 50V Low R =0.9 typ. Io= 500mA(U&L) ON STEP & DIR input Operation Half / Full Step Operation RESET Function Output Power Save Function (INH) Motor Origin Monitor Output (MO) Thermal Shutdown Circuit BCD Process Technology Package Outline DIP16 PIN CONNECTION 1 16 1. PB1 VDD 16. 2 15 2. PB2 15. MO 3. PGND 14. SGND 3 14 4. PA1 13. NC 4 13 5. PA2 12. RESET 5 12 6. DIR 11. INH 11 6 7. STEP 10. HSM 8. NC 9. NC 10 7 8 9 Fig.1 Pin Configuration ( DIP16 / SOP16 ) - 1 - NJW4350 BLOCK DIAGLAM I DD VDD NJW4350 VMM POWER ON RESET I I PLEAK O PB1 I I IH IL PB2 STEP PA1 DIR PA2 HSM PHASE LOGIC CIRCUIT RESET V V P DD INH V IN VDD V I IH MOLEAK V I IL MO MO Thermal Shut Down V MO SGND PGND Fig.2 Brock Diagram PIN DESCRIPTION Pin Pin name Description 1 PB1 B1 phase output with a maximum 1500 mA sinking open collector output 2 PB2 B2 phase output with a maximum 1500 mA sinking open collector output 3 PGND Power ground terminal of motor supply VMM 4 PA1 A1 phase output with a maximum of 1500 mA sinking open collector 5 PA2 A2 phase output with a maximum of 1500 mA sinking open collector 6 DIR Direction command input for determining motor turning direction 7 STEP Motor stepping pulse input, phase logic operation triggered by negative edge of STEP signal 8 NC Not connected 9 NC Not connected 10 HSM Half/full step mode switching input H level in full step mode and L level in half step mode 11 INH Phase output off input, all phase output is off at H level 12 RESET External reset signal input terminal 13 NC Not connected 14 SGND Logic ground terminal of logic supply VDD 15 MO Phase output initial status detection output 16 VDD Logic unit power supply voltage terminal - 2 -