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Product Detailed Parameters
- Description：LOW-VOLTAGE/LOW SATURATION VOLTA
- Series：*
- Mfr：Sanyo
- Package：Bulk
- Motor Type - Stepper：-
- Motor Type - AC, DC：-
- Function：-
- Output Configuration：-
- Interface：-
- Technology：-
- Step Resolution：-
- Applications：-
- Current - Output：-
- Voltage - Supply：-
- Voltage - Load：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The LB1848M-TRM-H is a two-phase unipolar drive DC brushless fan motor driver IC from the LB1848 series. It integrates functions for driving, lock protection, restart, and speed control. The device supports operation from either a 12 V or 24 V power supply by adjusting an external resistor. Key electrical characteristics include an output current (IO) of 1.5 A and built-in output circuit protection Zener diodes with a maximum voltage (M-Vz) of 32 V. The IC features a built-in thermal shutdown circuit and a rotation detect function, where the Drive mode outputs 'L' and the Stop mode outputs 'H'.
Feature Summary
- Supports two-speed mode selection requiring minimal external components, enabling full speed and low speed operation.
- Includes thermistor-controlled continuous variable-speed functionality based on ambient temperatures.
- Integrates motor lock protection and automatic return circuits to enhance reliability.
- Features built-in thermal shutdown and rotation detection capabilities.
Applications
- DC brushless fan motors in computer systems
- Cooling fans in office automation equipment
- Ventilation units in industrial machinery
Procurement Notes
Verify the specific suffix TRM-H against official Sanyo Semicon Device documentation to confirm tape-and-reel packaging and temperature grade. Ensure the ordering part number matches the exact voltage rating and package type required for your design. Cross-reference with ON Semiconductor datasheets if sourcing through alternative distributors, as ownership may have changed. Confirm RoHS compliance status directly from the manufacturer's latest release notes.
Selection Notes
Select this component when designing systems requiring integrated control for two-phase unipolar brushless fans. It is suitable for applications needing simple speed control via external resistors or thermistors. Consider the 1.5 A output current and 32 V Zener protection limits when matching motor specifications. The built-in protections reduce the need for additional discrete safety components.
Part Context
The LB1848 series belongs to Sanyo Semicon Device's portfolio of motor drivers designed for cooling applications. These ICs are engineered to simplify system design by integrating drive logic and protection circuits into a single package. The series is widely used in consumer electronics and industrial equipment where reliable fan control is essential.
Replacement Considerations
- LB1860M
FAQ
How is the operating voltage selected?
The LB1848M-TRM-H can operate from either a 12 V or 24 V power supply by changing the value of an external resistor connected to the voltage select pin.
What protection features are included?
The IC includes built-in thermal shutdown, motor lock protection, automatic return circuits, and output circuit protection Zener diodes rated at 32 V.
