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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 Control 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
Control 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
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