Ordering number : ENN7932A LB1935T LB1935CL Monolithic Digital IC Stepping Motor Driver IC Overview LB1935T/LB1935CL is IC with forward/reverse motor drive 2-channel in which low saturation voltage and low voltage operation possible. Its small sized package is optimal for 2 phase excitation drive of 2 phase bipolar stepping motors for various portable devices such as digital still cameras. Features • Low saturation voltage, VO(sat) = 0.3V typ at IO = 150mA • Built-in shoot-through current protection circuit • No standby current consumption (or zero) • Built-in thermal shutdown circuit • MSOP10 small-sized package (3.0mm×4.9mm×1.1mm typ) [LB1935T] • ECSP2828-10 ultraminiature leadless package (2.8mm×2.8mm×0.8mm typ) [LB1935CL] Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum Power Source Voltage VCC max Applied Output Voltage VOUT max OUT1, OUT2, OUT3, OUT4 pin Applied Input Voltage VIN max ENA, IN1, IN2 pin GND Pin Outflow Current I GND Per channel Allowable Power Consumption Pd max With substrate* [LB1935T] 400 Pd max With substrate* [LB1935CL] 450 -0.3 to +8.0 V VCC+VSF V -0.3 to +8.0 400 V mA mW Operating Temperature Topr -20 to +75 °C Storage Temperature Tstg -40 to +150 °C * Specified substrate : 20.0mm×10.0mm×0.8mm paper phenol Allowable Operating Range at Ta = 25°C Parameter Symbol Conditions Ratings Unit Source Voltage VCC 2.2 to 7.5 V Input High Level Voltage VIH ENA, IN1, IN2 pin 1.8 to 7.5 V Input Low Level Voltage VIL ENA, IN1, IN2 pin -0.3 to +0.7 V N3004 TN IM / 91004 JO IM No.7932-1/6 LB1935T, LB1935CL Electric Characteristics at Ta = 25°C, VCC = 3.3V Parameter Symbol Ratings Conditions min Power Source Current Output Saturation Voltage ICC0 ENA = 0V, VIN = 3V or 0V ICC1 ENA = 3V, VIN = 3V or 0V VOUT1 ENA = 3V, VIN = 3V or 0V, IOUT = 100mA VOUT2* ENA = 3V, VIN = 3V or 0V, IOUT = 200mA [LB1935T only] Input Current typ Unit max 1 µA 13 19 mA 0.2 0.3 V 0.4 0.6 V 0.1 IIN VIN = 3V 40 60 µA IENA VENA = 3V 40 60 µA 1 µA 1.7 V Spark killer diode Reverse Current IS(leak) Forward Voltage VSF* IOUT = 200mA [LB1935T only] Note : *For LB1935CL, it is a design assured value. Package Dimensions unit : mm 3297 [LB1935T] Package Dimensions unit : mm 3301 [LB1935CL] No.7932-2/6 LB1935T, LB1935CL Pin Assignments VCC 1 10 OUT4 VCC 1 10 OUT4 IN2 2 9 OUT3 IN2 2 9 OUT3 ENA 3 8 OUT1 ENA 3 8 OUT1 IN1 4 7 OUT2 IN1 4 7 OUT2 (NC) 5 6 GND (NC) 5 6 GND LB1935T Top view LB1935CL Top view ILB01601 No.7932-3/6 LB1935T, LB1935CL Block Diagram Truth Table Input ENA IN1 Output IN2 OUT1 OUT2 OUT3 OUT4 Remarks L - - OFF OFF OFF OFF Stdby H L L H L H L 2-phase excitation L H H L L H H H L H L H H L L H H L No.7932-4/6 LB1935T, LB1935CL Timing Chart Timing chart below shows the 2 phase excitation stepping motor. No.7932-5/6 LB1935T, LB1935CL PS No.7932-6/6