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22 LB1930M Low-saturation output H bridge forward/reverse motor driver that supports low-voltage drive Applications This device is a single-phase bipolar drive motor driver that can easily implement direct PWM drive for high motor drive efficiency. This device is optimal for driving all types of fan motors in applications from refrigerators to servers. Functions and Features Low-saturation output H bridge forward/reverse motor driver (one channel) Since the saturation voltage is low, the voltage applied to the motor is higher and the IC internal heat generation is minimized. This allows this device to be used in environments with higher operating ambient temperatures. Output saturation voltage: Vsat1 = 0.35 V typical (IO = 0.2 A) (High side + low side): Vsat2 = 0.55 V typical (IO = 0.5 A) Operating ambient temperature: Ta = -30 to +85°C This device is optimal for use in battery-operated equipment since the usage voltage range is wide (2.2 V to 10.8 V) and the current drain in standby mode is low (0.1 A). Through currents are held to a minimum by the internal logic by passing the system through standby mode when the input switches the mode CPU IN1 IN2 60k 80k 80k VCC 60k <strong>Control</strong> block S-GND between forward or reverse and brake mode, between forward and reverse, or between other modes. There are no constraints on the relative magnitudes of the input and supply voltages. (For example, the device can be used with VCC = 3 V and VIN = 5 V.) The thermal protection circuit suppresses the drive current and protects the IC from thermal damage or destruction when an output shorted or other abnormal state occurs causes high currents to flow and the IC chip temperature reaches 180°C or higher. Thermal shutdown circuit Large allowable power dissipation when mounted: Pd = 800 mW. Package: MFP14S P-GND C1=1µF OUT1 OUT2 M Motor drivers LB1948M Low-saturation output two-channel H bridge forward/reverse motor driver that supports low-voltage drive Applications This motor driver provides single-phase bipolar drive in all types of 12 V systems for either two DC motors or a single DC motor by connecting the two drive channels in parallel. This device is optimal for 1-2 phase excitation drive of two-phase bipolar stepping motors. Functions and Features Low-saturation output H bridge forward/reverse motor driver (two channels) Supports 12 V power supply systems Since the saturation voltage is low, the voltage applied to the motor is higher and the IC internal heat generation is minimized. This allows this device to be used in environments with higher operating ambient temperatures. Output saturation voltage: Vo(sat) = 0.50 V typical at IO = 400 mA Zero current drain standby mode Braking function Supports parallel connection: IOmax = 1.6 A, Vo(sat) = 0.6 V typical at IO = 800 mA Through currents are minimized by built-in IN1 IN2 IN3 IN4 60K 60K 60K 60K 80K 80K 80K 80K <strong>Control</strong> block Thermal shutdown circuit spark killer diodes and control that passes through standby mode. Thermal shutdown circuit (that can be used, for example, at VCC = 3 V, VIN = 5 V) The thermal protection circuit suppresses the drive current and protects the IC from thermal damage or destruction when an output shorted or other abnormal state occurs causes high currents to flow and the IC chip temperature reaches 180°C or higher. Thermal shutdown circuit Large allowable power dissipation when mounted: Pd = 800 mW. Package: MFP10S VCC 10µF OUT1 OUT2 OUT3 OUT4 GND M M 23
24 LB1644 Forward/reverse 2-ch motor drivers Applications Provides two forward/reverse motor driver channels. Since the forward, reverse, and brake modes of each channel are controlled by two logic inputs, this device can directly drive two motors with drive voltages in the range 6 to 24 V. The voltage applied to the motors can be modified by using external constant-voltage diodes. Since the forward, reverse, and brake modes are controlled by two logic inputs, it can drive a wide range of 6 V, 9 V, and 12 V motors. This device is optimal for stepping motor drive and for drive of any two of the reel, loading, and cassette motors in a VCR. Functions and Features The motor driver power transistors are built in and can support dash currents up to 1 A. Braking function for stopping the motors Motor dash current absorption devices Input pins can be connected to MOS ICs directly. VCC1 IN1 1 15 4,5,12,13 Fin OUT1 OUT2 14 3 Predriver TSD 2 16 8 7 IN2 VZ1 VZ2 IN3 Very few external components required Wide operating voltage range Thermal shutdown circuit The output voltages can be changed by using external constant-voltage diodes. Package: DIP16F OUT3 OUT4 6 11 Input logic block Input logic block Predriver 9 10 VCC2 IN4 LB1645N Forward/reverse 1-ch motor drivers Applications VCC1 P2 OUT2 VCC2 OUT1 P1 7 9 10 8 2 3 VZ IN2 4 6 Predriver Input logic block 5 1 IN1 GND Motor drivers This product provides a single forward/reverse motor driver channel. Since the forward, reverse, and brake modes are controlled by two logic inputs, it can drive a wide range of 6 V, 9 V, and 12 V motors. The voltage applied to the motor can be modified by using an external constant-voltage diode. Functions and Features Forward, reverse, and brake modes are controlled by two logic inputs Built-in motor dash current absorption element Input pins can be connected to MOS ICs directly. The output voltage can be changed by using an external constant-voltage diode. Package: SIP10F 25
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