Overview
The L6229DTR, produced by STMicroelectronics, is a fully integrated 3-phase motor driver designed for driving 3-phase brushless DC (BLDC) motors. Realized in BCD (Bipolar, CMOS, DMOS) technology, this device combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. It includes all the necessary circuitry for driving a 3-phase BLDC motor, such as a 3-phase DMOS bridge, a constant off-time PWM current controller, and decoding logic for single-ended Hall sensors. The L6229DTR is available in SO24 (20 + 2 + 2) and PowerSO36 packages, making it versatile for various applications.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VS) | 8 | - | 52 | V |
| Output Peak Current | - | - | 2.8 A | A |
| DC Output Current | - | - | 1.4 A | A |
| RDS(ON) at Tj = 25 °C | - | 0.73 Ω | - | Ω |
| Switching Frequency | - | - | 100 kHz | kHz |
| Operating Temperature Range | -40 | - | 150 | °C |
| Thermal Shutdown Temperature | - | - | 165 | °C |
Key Features
- Operating supply voltage from 8 to 52 V
- 2.8 A output peak current (1.4 A DC)
- RDS(ON) of 0.73 Ω typical at Tj = 25 °C
- Non-dissipative overcurrent detection and protection
- Diagnostic output
- Constant tOFF PWM current controller
- Slow decay synchronous rectification
- 60° and 120° Hall effect decoding logic
- Brake function
- Tachometer output for speed loop
- Cross conduction protection
- Thermal shutdown
- Undervoltage lockout
- Integrated fast free-wheeling diodes
Applications
- Factory automation end-points
- Home appliances
- Small pumps
- ATMs
Q & A
- What is the operating supply voltage range of the L6229DTR?
The operating supply voltage range is from 8 to 52 V.
- What is the maximum output peak current of the L6229DTR?
The maximum output peak current is 2.8 A.
- What is the typical RDS(ON) value at Tj = 25 °C?
The typical RDS(ON) value is 0.73 Ω.
- Does the L6229DTR have overcurrent protection?
Yes, it features non-dissipative overcurrent detection and protection.
- What is the purpose of the diagnostic output in the L6229DTR?
The diagnostic output is used to signal fault conditions, such as overcurrent or thermal shutdown, to a microcontroller or to implement external shutdown functions.
- What types of Hall effect decoding logic does the L6229DTR support?
The device supports 60° and 120° Hall effect decoding logic.
- Does the L6229DTR have a brake function?
Yes, it has a brake function that can be activated by the BRAKE input pin.
- What is the purpose of the tachometer output in the L6229DTR?
The tachometer output is used for speed loop control, providing a frequency-to-voltage signal based on the motor speed.
- How does the L6229DTR protect against cross conduction?
The device implements cross conduction protection using a deadtime between the turn-off and turn-on of two power MOSFETs in one leg of the bridge.
- What is the thermal shutdown temperature of the L6229DTR?
The thermal shutdown temperature is 165 °C.
