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SD148 | Value-Based BLDC Motor Controller

SD148

SD148 | Value-Based BLDC Motor Controller

The SD148 is a highly integrated motor controller for 3-phase BLDC motors, combining a 32-bit ARM Cortex-M33 core, gate driver, power management, communication, safety, and security features. Designed for automotive-grade reliability and flexibility, it supports up to 2 kW loads via external Power FETs and operates directly from 48V board net.

Benefits

Optimum in price & performance

Embedded MCU with headroom for FOC, diagnostics and security processing

Automotive safety: ASIL-B capable with EMM, MBIST, LBIST

Cybersecurity: base security setup including secure boot, secure flash

Advanced motor control via optimized timers and fast ADCs

Thermal budget optimization due to efficient power supply tree

Target applications

Electric oil/water/fuel pumps

HVAC blowers

Engine cooling fans

Front/rear wipers

Comfort & thermal management systems

Seat control, sunroof, trunk lid actuators

Technical Features

Type
Value-Based 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 (Hall, encoder, analog sensors)
Supply Voltage Range
20 V to 70 V (direct 48 V boardnet operation)
Integrated Power Management
On-chip buck regulator (~14 V) + internal LDOs + 3.3 V / 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, Rdson < 10mOhm, PWM frequency 10–21 kHz, optimized for high-efficiency BLDC operation
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 (16 channels) + 10-bit fast ADC for critical monitoring
Current Sensing
Single-shunt measurement with programmable gain amplifier (5 gain levels)
Communication
LIN 2.x (ISO 17987 / SAE J2602 compliant)
Low Power Modes
Sleep mode ~100 µA with wake-up via LIN / timer / wakeup pin
Protection & Diagnostics
Overcurrent, overtemperature, undervoltage, system diagnostics
Safety
ISO 26262 support up to ASIL-B
Security
Secure boot, secure flash programming, protected debug access
Operating Temperature
Junction -40 °C to 150 °C

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