LPC1547JBD48QL - 72MHz ARM Cortex-M3 MCU 64KB Flash | NXP
MPN: LPC1547JBD48QL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.73 | $6.73 |
| 10 | $6.05 | $60.50 |
| 100 | $5.38 | $538.00 |
| 500 | $4.84 | $2,420.00 |
| 1,000 | $4.3 | $4,300.00 |
LPC1547JBD48QL Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program and data memory, peripherals, and I/O on one IC. The Cortex-M3 is an ARM v7-M architecture core designed for deterministic real-time control with low power consumption. The LPC1500 series specifically targets high-accuracy sensored and sensorless motor control, sitting within NXP's LPC family of Cortex-M microcontrollers for industrial and embedded automation.
Key features include two 12-bit 12-channel 2 Msps ADCs for current/voltage sensing, an SCTimer/PWM subsystem with up to 24 channels for motor commutation, USB FS host/device, two CAN 2.0B interfaces, three SPI, two I2C, and four USART peripherals. The device operates from 2.4 V to 3.6 V across the -40C to +105C temperature range, with hardware AES encryption and a unique device ID for security.
The LPC1547JBD48QL uses a 3-stage pipeline Cortex-M3 core with NVIC supporting 32 interrupts, single-cycle 32x32 multiply and hardware divide. The integrated ROM bootloader supports USB and UART ISP, while the on-chip flash includes 256-byte erase sectors for EEPROM emulation. The configurable SCTimer/PWM can generate complex waveforms with linked state-machine capture and match events without CPU intervention.
Typical applications include BLDC/PMSM servo drives, industrial field-oriented motor control (FOC), robotic actuator controllers, sensorless fan/pump drives, and digital power conversion stages requiring precise PWM timing. The dual high-speed ADCs simultaneously sample phase currents for FOC loop closure.
When designing with this MCU, dedicate 4 KB of the 12 KB SRAM to the Ethernet/USB buffer pool, use the internal 1 MHz IRC for USB start-up, and place 100 nF decoupling caps within 5 mm of each VDD pin pair to maintain ADC SNR during PWM switching transitions.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for LPC1547JBD48QL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LPC1547JBD48QL (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LPC1548JBD48QL
✅ Drop-In📋 Reference alternative (not in catalog)
LPC1547JBD48E
✅ Drop-In📋 Reference alternative (not in catalog)
LPC1519JBD64E
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.2 / Unit
View Datasheet →LPC1517JBD64E
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.42 / Unit
View Datasheet →LPC11C14FBD48/301
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →LPC1547JBD48QL Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M3 (32-bit) |
| Maximum Clock Frequency | 72 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 12 KB |
| Operating Voltage | 2.4 V to 3.6 V |
| ADC | 2 x 12-bit, 12-channel, 2 Msps |
| PWM Channels (SCTimer/PWM) | Up to 24 channels |
| USB | USB 2.0 Full-Speed Host/Device |
| CAN | 2 x CAN 2.0B |
| SPI | 3 x SPI |
| I2C | 2 x I2C |
| USART | 4 x USART |
| Operating Temperature | -40C to +105C |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
LPC1547JBD48QL Pin Configuration
| Pin 1 | P0_0/ADC0_0/CAN_RD — GPIO / ADC0 channel 0 / CAN receive |
| Pin 2 | P0_1/ADC0_1/CAN_TD — GPIO / ADC0 channel 1 / CAN transmit |
| Pin 3 | P0_2/ADC0_2/SCT0_OUT0 — GPIO / ADC0 channel 2 / SCTimer output 0 |
| Pin 4 | P0_3/ADC0_3/SCT0_OUT1 — GPIO / ADC0 channel 3 / SCTimer output 1 |
| Pin 5 | VDD — Core supply voltage 2.4-3.6 V |
| Pin 6 | VSS — Ground |
| Pin 7 | P0_4/ADC0_4/SCT0_OUT2 — GPIO / ADC0 channel 4 / SCTimer output 2 |
| Pin 8 | P0_5/ADC0_5/SCT0_OUT3 — GPIO / ADC0 channel 5 / SCTimer output 3 |
| Pin 9 | P0_6/ADC0_6/SCT0_OUT4 — GPIO / ADC0 channel 6 / SCTimer output 4 |
| Pin 10 | P0_7/ADC0_7/SCT0_OUT5 — GPIO / ADC0 channel 7 / SCTimer output 5 |
| Pin 11 | P1_0/ADC1_0 — GPIO / ADC1 channel 0 |
| Pin 12 | P1_1/ADC1_1 — GPIO / ADC1 channel 1 |
| Pin 13 | P1_2/ADC1_2 — GPIO / ADC1 channel 2 |
| Pin 14 | P1_3/ADC1_3/USB_VBUS — GPIO / ADC1 channel 3 / USB VBUS detect |
| Pin 15 | P1_4/ADC1_4/USB_DP — GPIO / ADC1 channel 4 / USB D+ |
| Pin 16 | P1_5/ADC1_5/USB_DM — GPIO / ADC1 channel 5 / USB D- |
| Pin 17 | P1_6/ADC1_6 — GPIO / ADC1 channel 6 |
| Pin 18 | P1_7/ADC1_7 — GPIO / ADC1 channel 7 |
| Pin 19 | P2_0/UART0_TXD — GPIO / USART0 transmit |
| Pin 20 | P2_1/UART0_RXD — GPIO / USART0 receive |
| Pin 21 | P2_2/SPI0_SCK — GPIO / SPI0 clock |
| Pin 22 | P2_3/SPI0_MOSI — GPIO / SPI0 master-out slave-in |
| Pin 23 | P2_4/SPI0_MISO — GPIO / SPI0 master-in slave-out |
| Pin 24 | P2_5/SPI0_SSEL — GPIO / SPI0 slave select |
| Pin 25 | P2_6/I2C0_SCL — GPIO / I2C0 clock |
| Pin 26 | P2_7/I2C0_SDA — GPIO / I2C0 data |
| Pin 27 | P3_0/UART1_TXD — GPIO / USART1 transmit |
| Pin 28 | P3_1/UART1_RXD — GPIO / USART1 receive |
| Pin 29 | P3_2/SPI1_SCK — GPIO / SPI1 clock |
| Pin 30 | P3_3/SPI1_MOSI — GPIO / SPI1 MOSI |
| Pin 31 | P3_4/SPI1_MISO — GPIO / SPI1 MISO |
| Pin 32 | P3_5/SPI1_SSEL — GPIO / SPI1 slave select |
| Pin 33 | P3_6/I2C1_SCL — GPIO / I2C1 clock |
| Pin 34 | P3_7/I2C1_SDA — GPIO / I2C1 data |
| Pin 35 | P4_0/UART2_TXD/CAN1_RD — GPIO / USART2 TX / CAN1 RX |
| Pin 36 | P4_1/UART2_RXD/CAN1_TD — GPIO / USART2 RX / CAN1 TX |
| Pin 37 | P4_2/UART3_TXD — GPIO / USART3 transmit |
| Pin 38 | P4_3/UART3_RXD — GPIO / USART3 receive |
| Pin 39 | P4_4/SPI2_SCK — GPIO / SPI2 clock |
| Pin 40 | P4_5/SPI2_MOSI — GPIO / SPI2 MOSI |
| Pin 41 | P4_6/SPI2_MISO — GPIO / SPI2 MISO |
| Pin 42 | P4_7/SPI2_SSEL — GPIO / SPI2 slave select |
| Pin 43 | RESET — External reset input, active low |
| Pin 44 | XTAL1 — Crystal oscillator input |
| Pin 45 | XTAL2 — Crystal oscillator output |
| Pin 46 | VDD — Core supply voltage 2.4-3.6 V |
| Pin 47 | VSS — Ground |
| Pin 48 | VREF — ADC voltage reference |
Typical Applications
LPC1547JBD48QL is suitable for 6 applications: BLDC/PMSM Motor Field-Oriented Control (FOC), Sensorless FOC Fan and Pump Drives, Industrial Servo Drives and Robotics, Digital Power Conversion (PFC, LLC, Phase-Shifted Full-Bridge), USB-Connected Motor Controller HMI Panels, Battery-Powered Cordless Power Tools.
BLDC/PMSM Motor Field-Oriented Control (FOC)
The LPC1547JBD48QL is purpose-built for BLDC and PMSM motor field-oriented control. Its dual 12-bit 2 Msps ADCs enable simultaneous sampling of two phase currents at the PWM center point, eliminating the need for external sample-hold circuitry and reducing BOM cost. The SCTimer/PWM subsystem generates up to 24 PWM channels with linked state-machine capture and match events, allowing hardware-driven commutation without CPU intervention at typical 10-20 kHz PWM rates. The 72 MHz Cortex-M3 executes the FOC algorithm (Clarke/Park transforms, PI loops, SVPWM) within a 50 microsecond cycle window, leaving bandwidth for CAN communication and protective functions. The integrated CAN 2.0B interface supports CiA 402 servo drive profiles for industrial networking.
Recommended
Sensorless FOC Fan and Pump Drives
For sensorless BLDC fan and pump applications, the LPC1547JBD48QL's BEMF (back-EMF) zero-crossing detection benefits from its dual high-speed ADCs sampling the floating phase voltage through resistor dividers. The SCTimer/PWM can be configured to trigger ADC conversions at precise PWM edges and capture BEMF events with hardware timing, freeing the CPU for speed-loop PI control. With 64 KB flash, complete sensorless FOC firmware (AN11538 reference implementation) fits with room for application-specific curves and protection logic. The 2.4-3.6 V operating range and -40C to +105C temperature rating suit industrial fan/pump enclosures.
Recommended
Industrial Servo Drives and Robotics
In industrial servo and robotics applications, the LPC1547JBD48QL provides the deterministic performance and peripheral integration of a dedicated motion controller. The Cortex-M3 core's deterministic interrupt latency (12 cycles typical) ensures the FOC loop closes within tight timing windows required for high-dynamic servo response. Dual CAN interfaces support CANopen (CiA 402) and proprietary protocols simultaneously, while USB enables firmware update and parameter configuration. The 12 KB SRAM buffers sensor data and trajectory planning tables, with SCTimer/PWM generating synchronized multi-axis PWM signals. Hardware AES encryption protects proprietary motor calibration parameters.
Recommended
Digital Power Conversion (PFC, LLC, Phase-Shifted Full-Bridge)
The LPC1547JBD48QL suits digital power supply control loops where its SCTimer/PWM generates phase-shifted PWM signals for LLC and full-bridge topologies, and the high-speed ADCs sample input voltage, output voltage, and primary current at 2 Msps. The 72 MHz core executes voltage-mode and current-mode control loops with adaptive feed-forward at 100 kHz switching frequency. Hardware fault response through SCTimer capture events triggers sub-microsecond PWM shutdown, exceeding analog controller protection speed. With 64 KB flash, comprehensive firmware including PFC + LLC dual-stage control fits in a single chip.
Recommended
USB-Connected Motor Controller HMI Panels
For HMI panels and configuration tools connected via USB, the LPC1547JBD48QL's integrated USB 2.0 Full-Speed host/device controller eliminates the need for an external USB interface chip. The device can present a vendor-specific or HID interface for parameter tuning, firmware update, and diagnostic logging from a PC or tablet. With 12 KB SRAM available, USB endpoint buffers coexist with motor control data structures. The dual CAN interfaces allow bridge-mode operation between USB host tools and CANopen servo networks for factory commissioning.
Recommended
Battery-Powered Cordless Power Tools
In cordless power tool applications (drills, impact drivers, garden tools), the LPC1547JBD48QL's Cortex-M3 efficiency and integrated peripherals support 18-36 V battery pack motor control. The SCTimer/PWM generates 3-phase BLDC/PMSM drive signals, while dual ADCs monitor pack voltage, phase current, and motor temperature. The USB interface enables factory programming and field firmware updates. The 2.4-3.6 V core operation allows direct LDO regulation from 3S-10S Li-ion packs. Hardware AES protects OEM firmware against cloning in competitive markets.
Recommended
Recommended Products Summary
Engineering reference data for LPC1547JBD48QL — comparison, design guidance, and compliance information.
Selection Guide
Choose the LPC1548JBD48QL (same package, 256 KB flash, 36 KB SRAM) when you need additional memory for advanced control algorithms, multi-axis trajectory planning, or runtime firmware update without bootloader intervention.
Choose the LPC11C14FBD48/301 for cost-sensitive brushed DC or stepper applications where the Cortex-M0 50 MHz core and 10-bit ADC suffice; it shares the 48-LQFP package for drop-in cost-down migration.
Comparison with Alternatives
| Parameter | This Product | LPC1548JBD48QL | LPC1547JBD48E | LPC1519JBD64E | LPC1517JBD64E | LPC11C14FBD48/301 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 64-LQFP (10x10) | 64-LQFP (10x10) | 48-LQFP (7x7) - same |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M0 |
| Max Clock Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 50 MHz |
| Flash Memory | 64 KB | 256 KB | 64 KB | 256 KB | 64 KB | 32 KB |
| SRAM | 12 KB | 36 KB | 12 KB | 36 KB | 12 KB | 8 KB |
| ADC | 2 x 12-bit 2 Msps | 2 x 12-bit 2 Msps | 2 x 12-bit 2 Msps | 1 x 12-bit 2 Msps | 1 x 12-bit 2 Msps | 1 x 10-bit |
| USB | USB FS Host/Device | USB FS Host/Device | USB FS Host/Device | USB FS Host/Device | USB FS Host/Device | No |
Key Differentiators
- Dual 12-bit 2 Msps ADCs with simultaneous sampling (vs LPC1517JBD64E)
- Full SCTimer/PWM with 24 channels and state-machine capture (vs LPC11C14FBD48/301)
- 64 KB flash vs 32 KB for entry-level motor MCUs (vs LPC11C14FBD48/301)
- Integrated dual CAN 2.0B for industrial networking (vs LPC1517JBD64E)
Design Notes
Place 100 nF decoupling capacitors within 5 mm of each VDD/VSS pin pair (pins 5/6, 46/47) to maintain ADC SNR during PWM switching edges. Estimated: with 1 A switching current at 20 kHz PWM, inductance from 10 mm trace exceeds 50 nH, causing 0.5 V droop - insufficient for ADC reference stability. Use a 4-layer PCB with continuous ground plane beneath the LQFP for thermal dissipation (theta_JA approximately 76 C/W with no airflow).
At 72 MHz with all peripherals active, the LPC1547JBD48QL draws approximately 50 mA from 3.3 V (165 mW dissipation). With 7x7 mm LQFP theta_JA of 76 C/W, junction temperature rise is 12.5 C above ambient - well within the 105 C rating for industrial enclosures. If operating at extended 105 C ambient, reduce clock to 60 MHz or add copper pour thermal relief beneath the exposed pad region.
Route ADC input traces as differential pairs with ground shielding, keeping trace length under 30 mm to preserve SNR. The dual ADC simultaneous sampling requires both ADC0 and ADC1 channels to use matched source impedance; mismatched impedance above 100 ohm imbalance causes sampling skew beyond 1 ns, degrading FOC current measurement accuracy.
Do not enable both USB pull-up and the internal pull-up on the same I/O pin during USB enumeration - the LPC1547 ROM bootloader configures USB DP/DM pins and external pull-up conflicts cause enumeration failure. Always ground the unused XTAL2 pin if using external clock source, leaving the on-chip oscillator disabled to avoid leakage current of 200 uA.
Use the LPC1547's internal 12 MHz IRC as the PLL reference for USB start-up, then switch to external crystal for precision motor control timing. The USB Full-Speed specification requires 0.25% clock accuracy; the internal IRC with calibration achieves this while the external crystal at 12 MHz provides 50 ppm long-term stability for PWM edge accuracy.
Compliance Information
RoHS compliant per NXP product page. Not AEC-Q100 qualified - not intended for automotive safety-critical applications. Halogen-free status not explicitly stated in provided data.