LB1939T 2 Channel H Bridge Constant Voltage/Constant Current Driver www.onsemi.com Overview Package Dimensions The LB1939T is a two-phase excitation bipolar stepping unit: mm motor driver that features low voltage operation, a low 3246-TSSOP20 saturation voltage, and low power consumption. It LB1939T supports constant voltage and constant current drive, can 6.5 control two iris motors, and is optimal for shutter, iris, and 20 11 AF drive in 3 V battery operated still digital cameras and other battery operated equipment. Features Low-voltage drive Dual power supply operation: VS = 1.6 to 7.5 V, 1 10 0.15 0.65 0.22 V = 1.9 to 6.5 V DD (0.33) Single power supply operation: VS = V = 1.9 to DD 7.5 V Low saturation voltage output: Vosat = 0.3 V at I = O 200 mA TSSOP20 Supports constant voltage and constant current drive Built-in reference voltage circuit (Vref = 0.9 V) Miniature, thin form package (Thickness t = 1.1 mm) Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Conditions Ratings Unit Maximum supply voltage V VS1, VS2, V 0.3 to +10.5 V Bmax DD Applied output voltage V OUT1, 2, 3, 4 0.3 to +10.5 V OUT Maximum output current: OUT1, 2, 3, and 4 I t 10 ms 400 mA Omax Applied input voltage V ENA, IN, VC 10.5 V IN Allowable power dissipation Pdmax When mounted on a printed circuit board* 0.8 W Operating temperature Topr 20 to +85 C Storage temperature Tstg 55 to +150 C 3 Note: Circuit board: 114.3 76.1 1.6 mm glass epoxy board Semiconductor Components Industries, LLC, 2013 1 Publication Order Number : December 2013 - Rev. 0 LB1939T/D 4.4 (1.0) 0.08 1.2max 6.4 0.5LB1939T Allowable Operating Conditions at Ta = 25C Ratings Parameter Symbol Conditions Unit min typ max Operation guaranteed voltage range 1 V 1 V system, VS = 2.0 V 1.9 6.5 V OPR DD Operation guaranteed voltage range 2 V 2 VS system, V = 5.0 V 1.6 7.5 V OPR DD Input low-level threshold voltage V ENA1, ENA2, IN1, IN2 0.3 +1.0 V IL Input high-level threshold voltage V ENA1, ENA2, IN1, IN2 2.0 6.0 V IH Electrical Characteristics at Ta = 25C, VS = 3.0 V, V = 5.0 V DD Ratings Parameter Symbol Conditions Unit min typ max Standby mode current drain I VS = V = 6.5 V 0.1 1.0 A STB DD Regulator Output Circuit V output voltage V I = 0 to 1 mA 0.85 0.9 0.95 V REF REF OL SV output voltage VSV I = 10 mA 4.7 4.8 V DD DD OL H Bridge Output Circuit OUT pin output saturation voltage 1 V = 5.0 V, VC = SV , VS = 2.0 V DD DD Vosat1 0.20 0.30 V (Saturation control mode) I = 200 mA (PNP transistor side) O OUT pin output saturation voltage 2 V = 5.0 V, VC = SV , VS = 2.0 V DD DD Vosat2 0.10 0.15 V (Saturation control mode) I = 200 mA (NPN transistor side) O OUT pin output voltage 1 V = 6.0 V, VC = 1.5 V, VS = 3.5 V DD V 1 2.8 2.9 3.0 V OUT (Constant voltage control mode) I = 200 mA (PNP transistor side) O OUT pin output voltage 2 V = 6.0 V, VC = V , VS = 2.0 V DD REF V 2 1.65 1.75 1.85 V OUT (Constant voltage control mode) I = 200 mA (PNP transistor side) O OUT pin output current 1 V = 6.0 V, VC = 0.9 V, VS = 3.5 V DD I 1 197 210 223 mA OUT (Constant current control mode) RL = 5 (between OUT and OUT), RFB = 1 OUT pin output current 2 V = 6.0 V, VC = V , VS = 2.0 V DD REF I 2 189 210 231 mA OUT (Constant current control mode) RL = 5 (between OUT and OUT), RFB = 1 VS system operating current drain 1 I 1 VC = SV 4 7 mA S DD VS system operating current drain 2 I 2 VC = VREF 1.5 3 mA S V system operating current drain 1 I 1 VC = SV ENA1 = 2 V 4 7 mA DD DD DD V system operating current drain 2 I 2 VC = V ENA1 = 2 V 4 7 mA DD DD REF VC input voltage range VC 0.1 7 V VC input current IVC V = 6.0 V, VS = 2.0 V, VC = 5.0 V 0 50 100 A DD Control Input Circuit I V = 5.5 V 70 100 A IH IH Control pin maximum input current I V = GND 1 0 A IL IL Pd max Ta 1 Mounted on a 114.3 76.1 1.6 mm glass-epoxy printed circuit board 0.8 0.6 0.4 0.2 0 20 0 20 40 60 80 100 Ambient temperature, Ta C www.onsemi.com 2 Allowable power dissipation, Pdmax W