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SD148 | Integrated 48V BLDC Motor Controller

SD148

SD148 | Integrated 48V BLDC Motor Controller

The SD148 is a highly integrated automotive BLDC motor controller for 48V systems, combining a 32-bit MCU, gate driver, power management, communication, safety monitoring, and measurement functions in a compact QFN48 package. Designed for cost-optimized and space-constrained automotive motor applications, SD148 supports sensorless and sensored BLDC control for pumps, fans, and blowers up to 2 kW, depending on external MOSFET selection and thermal design.

Benefits

Integrated MCU, gate driver, power management, and LIN communication in one package

Direct 48V boardnet operation with integrated switching regulator architecture

Optimized for cost-sensitive and space-constrained automotive BLDC applications

Embedded security architecture with secure storage and protected access

Advanced PWM timer and ADC architecture for efficient motor control algorithms

Supports sensorless and sensored motor control

Target applications

Electric oil/water/fuel pumps

HVAC blowers/Engine cooling fans

Comfort & Thermal manage-ment systems

Front/rear wipers

General 48V BLDC auxiliary drives

Seat control, sunroof, trunk lid actuators

Technical Features

Type
Integrated 48V BLDC Motor Controller
Package
QFN48 (7×7 mm) with exposed pad, wettable flanks
Application Power Range
Up to ~2 kW motor systems (depending on MOSFETs & thermal design)
Motor Control Capability
Sensorless (BEMF) and sensored control (analog and digital position
Sensors e.g. Hall, encoder, SENT)
Supply Voltage Range
20V to 70V operating range (direct 48V boardnet connection)
Integrated Power Management
On-chip buck regulator + internal LDOs + 3.3V / 20 mA sensor supply
Gate Driver (3-Phase B6)
Control of 6× external N-MOSFETs up to 100 V, ±1 A peak gate drive current
CPU
32-bit ARM Cortex-M33 @ 80 MHz
Memory
160 kB Flash (ECC), 16 kB Data Flash, 16 kB RAM (ECC protected)
ADC
12-bit ADC subsystem (16 channels)
Current Sensing
Single-shunt measurement with programmable gain amplifier (4 gain levels)
Communication
LIN 2.x (ISO 17987-4 compliant)
Low Power Modes
Sleep mode ~100 µA with wake-up via LIN / timer / wakeup pin
Protection & Diagnostics
Overcurrent, overtemperature, Over/undervoltage, system
Safety
ISO 26262 support up to ASIL-B
Security
Secure access, secure storage, secure flash support, protected
Operating Temperature
Junction -40 °C to 150 °C

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