Overview
The L6229D, produced by STMicroelectronics, is a DMOS fully integrated 3-phase motor driver designed for driving brushless DC (BLDC) motors. It is realized in BCD (Bipolar-CMOS-DMOS) technology, combining isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This device includes all the necessary circuitry to drive a 3-phase BLDC motor, including a 3-phase DMOS bridge, a constant off-time PWM current controller, and decoding logic for single-ended Hall sensors.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 8 | - | 52 | V |
| Output Peak Current | - | - | 2.8 A | A |
| Output DC Current | - | - | 1.4 A | A |
| RDS(ON) | - | 0.73 Ω | - | Ω |
| Switching Frequency | - | - | 100 kHz | kHz |
| Operating Temperature | -40 | - | 150 | °C |
| Thermal Shutdown Temperature | - | - | 165 | °C |
Key Features
- Non-dissipative overcurrent detection and protection
- Thermal shutdown and undervoltage lockout
- Constant off-time PWM current controller
- Slow decay synchronous rectification
- 60° and 120° Hall effect decoding logic
- Brake function and tachometer output for speed loop
- Cross conduction protection
- Diagnostic output and integrated fast free-wheeling diodes
- Bootstrap voltage for driving upper power MOSFETs
Applications
- Factory automation end-points
- Home appliances
- Small pumps
- ATMs and other automated systems
Q & A
- What is the L6229D used for?
The L6229D is used for driving 3-phase brushless DC (BLDC) motors.
- What is the operating supply voltage range of the L6229D?
The operating supply voltage range is from 8 V to 52 V.
- What is the maximum output peak current of the L6229D?
The maximum output peak current is 2.8 A.
- Does the L6229D have overcurrent protection?
Yes, it features non-dissipative overcurrent detection and protection.
- What is the thermal shutdown temperature of the L6229D?
The thermal shutdown temperature is 165 °C.
- What type of technology is used in the L6229D?
The L6229D is realized in BCD (Bipolar-CMOS-DMOS) technology.
- Does the L6229D support Hall effect sensors?
Yes, it includes decoding logic for single-ended Hall sensors.
- What is the purpose of the bootstrap voltage in the L6229D?
The bootstrap voltage is needed for driving the upper power MOSFETs.
- What are some common applications of the L6229D?
Common applications include factory automation, home appliances, small pumps, and ATMs.
- How does the L6229D protect against cross conduction?
The device implements cross conduction protection using a deadtime set by an internal timing circuit.
