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Product Detailed Parameters
- Description：IC MOTOR DRIVER 4.5V-16V 14HSSOP
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushed DC
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (2)
- Interface：Parallel
- Technology：Bipolar
- Step Resolution：-
- Applications：Fan Motor Driver
- Current - Output：1A
- Voltage - Supply：4.5V ~ 16V
- Voltage - Load：4.5V ~ 16V
- Operating Temperature：-30°C ~ 90°C (TA)
- Mounting Type：Surface Mount
- Package / Case：14-LSSOP (0.173", 4.40mm Width) + 2 Heat Tabs
- Supplier Device Package：14-HSSOP
- Grade：-
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Overview
The LB11961-W-AH is a single-phase bipolar drive motor driver designed for direct PWM motor drive systems. It integrates 16V, 1.0A transistors and operates within a supply voltage range of 4.5 V to 14 V. The device features a built-in variable speed function controlled by thermistor input, allowing for quiet, low-vibration operation. Key electrical parameters include a maximum power dissipation of 1.1 W and an operating supply current of 24 mA. It provides FG (speed detection) and RD (lock detection) outputs, along with thermal shutdown protection.
Feature Summary
- Single-phase full-wave drive capability with integrated high-side transistors
- Built-in variable speed control via external thermistor input
- Integrated lock protection with automatic recovery circuits
- Thermal shutdown circuit for enhanced reliability
Applications
- Fan motor drive in personal computer power supply systems
- CPU cooling fan systems
- Variable speed control applications requiring low vibration
Procurement Notes
Verify the specific suffix 'W-AH' against official onsemi documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Ensure the component meets the required operating temperature range of -30°C to +90°C for the intended application environment.
Selection Notes
Select this driver for single-phase fan motors requiring simple PWM control without complex feedback loops. It is suitable for applications where thermistor-based speed regulation is preferred. Consider the HSSOP-14 package constraints and the 1.0A current limit when designing the thermal management solution.
Part Context
The LB11961 series includes variants such as LB11961V and LB11961-TLM-E. These components are categorized under Fan / Motor Controllers / Drivers within the PMIC segment. The series is designed for efficient, low-noise fan control in computing and consumer electronics.
Replacement Considerations
Check for pin-compatible alternatives within the LB11961 family or similar single-phase drivers from onsemi. Verify that substitute parts support the same 16V/1.0A rating and thermistor input functionality.
