Summary of MP6540H/MP6540HA ARE THREE-PHASE BRUSHLESS DC MOTOR DRIVERS
The MP6540H and MP6540HA from Monolithic Power Systems are integrated three-phase BLDC motor drivers that include three half-bridges (six N-channel MOSFETs), pre-drivers, gate-drive supplies, and current-sense amplifiers. The MP6540H provides PWM and EN inputs per half-bridge, while the MP6540HA offers separate HS and LS inputs. They support 5.5–50 V, deliver up to 5 A continuous (6 A peak), include an internal charge pump for 100% duty operation, automatic synchronous rectification, and safety features like UVLO, thermal shutdown, and OCP in a 26-pin QFN package.
Parts used in the MP6540H/MP6540HA Project:
- MP6540H three-phase BLDC motor driver (QFN-26 package)
- MP6540HA three-phase BLDC motor driver (QFN-26 package)
- Integrated six N-channel power MOSFETs (within device)
- Pre-drivers (integrated)
- Gate drive power supply/charge pump (integrated)
- Trickle charge circuit (integrated)
- Current-sense amplifiers (integrated)
- PCB with appropriate thermal management
- External supply 5.5 V to 50 V
The MP6540H and MP6540HA from Monolithic Power Systems are three-phase brushless DC motor drivers. These devices integrate three half-bridges consisting of six N-channel power MOSFETs, pre-drivers, gate drive power supplies, and current-sense amplifiers.
The MP6540H has enable (EN) and PWM inputs for each half-bridge, while the MP6540HA has separate high-side (HS) and low-side (LS) inputs, otherwise they are identical. The MP6540H can deliver up to 6 A of peak current and 5 A of continuous output current, based on thermal and PCB conditions. The MP6540H uses an internal charge pump to generate the gate drive supply voltage for the high-side MOSFETs, and a trickle charge circuit that maintains sufficient gate drive voltage to operate at 100% duty cycle. Internal safety features include thermal shutdown, undervoltage lockout (UVLO), and overcurrent protection (OCP). The device is available in a QFN-26 (5 mm x 5 mm) package.
Features:
- 5.5 V to 50 V operating supply voltage
- Three integrated half-bridge drivers
- Maximum 5 A output current, 6 A peak current
- MOSFET ON resistance: HS + LS 45 mΩ
- MP6540H: PWM and EN inputs; MP6540HA: HS and LS inputs
- Internal charge pump supports 100% duty cycle operation
- Automatic synchronous rectification
- UVLO and thermal shutdown protection
- OCP
Read more: MP6540H/MP6540HA ARE THREE-PHASE BRUSHLESS DC MOTOR DRIVERS
- What are the operating supply voltage limits for the MP6540H and MP6540HA?
The devices operate from 5.5 V to 50 V according to the article. - How many MOSFETs are integrated in each device?
Each device integrates six N-channel power MOSFETs configured as three half-bridges. - What continuous and peak output currents can the MP6540H deliver?
The MP6540H can deliver up to 5 A continuous output current and 6 A peak current depending on thermal and PCB conditions. - How does the MP6540H support 100% duty cycle operation?
The MP6540H uses an internal charge pump and a trickle charge circuit to maintain sufficient gate drive voltage for 100% duty cycle operation. - What input differences exist between the MP6540H and MP6540HA?
The MP6540H has PWM and EN inputs for each half-bridge, while the MP6540HA has separate high-side and low-side inputs. - What internal protection features do these devices include?
They include thermal shutdown, undervoltage lockout (UVLO), and overcurrent protection (OCP). - What is the MOSFET on-resistance of the integrated switches?
The combined HS plus LS MOSFET ON resistance is 45 mOhm as stated in the article. - Do these drivers support synchronous rectification automatically?
Yes, the devices provide automatic synchronous rectification according to the article. - What package do the MP6540H and MP6540HA come in?
They are available in a QFN-26 package measuring 5 mm x 5 mm.
