NJW4372 Pulse Input Stepper Motor Driver NJW4372V ■ BLOCK DIAGLAM VDD BIAS VMM VMM POR SENSE1 VR TOR1 TOR2 ENABLE BRAKE H-BRIDGE (Pch-Nch) OSC MO VMM VMM VMM VMM OUT1A OUT1B OUT2A H-BRIDGE (Pch-Nch) HSM GATE DRIVE DIR OUTPUT CONTROL LOGIC STEP GATE DRIVE RESET PWM LOGIC ▪ Supply Voltage : 2.7V ~ 5.5V ▪ Motor Supply Voltage : 10V ~ 38V ▪ Output Current : 500mA / ch ▪ ON Resistance Output : RO = 1.65Ω ( typ. ) ▪ Quiescent Current : IDD = 300 µA ( typ. ) ▪ Pulse Input ( STEP & DIR ) Control ▪ TTL Compatible Input ▪ ENABLE / PD( Power down and Reset ) function ▪ PWM Constant Current Control Circuit ▪ Torque Control Function ( TOR ) ▪ Protection Circuit : UVLO, THD ▪ Package : SDIP-22 / SSOP32 NJW4372L PWM LOGIC ■ FEATURE ■ PACKAGE OUTLINE TRANSLATOR The NJW4372 is a bipolar drive stepper motor driver IC characterized as highly efficient. The control method used is a simple pulse train input control (STEP & DIR) method of programming. The drive stage consists of DMOS H bridges. Therefore, motor drive application circuit is composed of highly effective and low heating value. Supply / interface voltage corresponds to the logic, 3.3V / 5.0V. NJW4372 has PWM current control circuits, Torque set, Enable and PD functions. The functions are easy and convenient to operate and suitable for a wide range of applications. CURRENT LEVEL CONTROL (100, 70, 40, 20%) ■ GENERAL DESCRIPTION OUT2B SENSE2 PROTECTION UVLO_VDD UVLO_VMM TSD ALARM GND Ver.2010/09/03