Product Overview LB1939T: Motor Driver, Constant Voltage / Current, H-Bridge, 2-Channel For complete documentation, see the data sheet Product Description The LB1939T is a 2-phase excitation bipolar stepping motor driver that features low voltage operation, a low saturation voltage and low power consumption. It supports constant voltage and constant current drive, can control two iris motors and is optimal for shutter, iris and AF drive in 3V battery operated still digital cameras and other battery operated equipment. Features • • • • Low voltage drive Low saturation voltage output Supports constant voltage and constant current drive Built-in reference voltage circuit Applications • Battery operated equipment Part Electrical Specifications Product Compliance Status Type VM Min (V) VM Max (V) VCC Min (V) VCC Max (V) IO Max (A) LB1939T-MPB-E Pb-free Active Step per 1.6 10.5 1.9 10.5 0.4 Step per 1.6 LB1939T-TLM-E Pb-free Active IO Peak Max (A) Step Cont Reso rol lutio Type n 1 ½ 10.5 1.9 10.5 0.4 ½ 1 For more information please contact your local sales support at www.onsemi.com Created on: 1/15/2015 Feed back Meth od Curr ent Sens e Reg ulato r Outp ut Fault Flyb Dete ack ction Prot ectio n RDS(o Pack n) age Typ Type (Ω) Paral Non lel e Exter Yes nal Resi stor Ther mal Integ rated Activ e TSS OP20 Paral Non lel e Exter Yes nal Resi stor Ther mal Integ rated Activ e TSS OP20