Overview
The L6204D, produced by STMicroelectronics, is a dual full bridge driver IC designed for motor control applications. It utilizes BCD (Bipolar, CMOS, DMOS) technology, combining isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This mixed technology allows for optimized logic circuitry and power stage performance. The device is particularly suited for driving DC motors, stepper motors, and other inductive loads.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 12 to 48 | V |
| Input or Enable Voltage Range (VIN, VEN) | -0.3 to +7 | V |
| Pulsed Output Current (Io) | 3 | A |
| Sensing Voltage (VSENSE) | -1 to 4 | V |
| Bootstrap Supply (VBOOT) | 60 | V |
| Total Quiescent Current (IS) | 10 | mA |
| Commutation Frequency (fC) | 20 kHz | |
| Thermal Shutdown (TJ) | 150 | °C |
| Dead Time Protection (Td) | 500 ns | |
| On Resistance (RDS) | 1.2 | Ω |
| Input Low Voltage (VINL, VENL) | -0.3 to 0.8 | V |
| Input High Voltage (VINH, VENH) | 2 to 7 | V |
| Input Low Current (IINL, IENL) | -10 µA | |
| Input High Current (IINH, IENH) | 50 µA |
Key Features
- TTL/CMOS compatible logic inputs
- Supply voltage up to 48V
- Low RDS(ON) of 1.2Ω at 25°C
- Cross conduction protection
- Thermal shutdown
- 0.5A DC current capability
- High efficiency chopping
- Multipower BCD technology combining isolated DMOS power transistors with CMOS and bipolar circuits
- Independent control of each bridge through 4 inputs and 2 enable inputs
- External connections for sensing resistors in constant current chopper applications
- Bootstrap charge pump for high-side driver operation
Applications
The L6204D is designed for various motor control applications, including:
- Driving DC motors
- Driving stepper motors
- Controlling other inductive loads
It is particularly useful in systems requiring high current handling, low power dissipation, and robust protection features.
Q & A
- What is the maximum supply voltage for the L6204D?
The maximum supply voltage for the L6204D is 48V.
- What is the on-resistance (RDS(ON)) of the DMOS transistors in the L6204D?
The on-resistance (RDS(ON)) of the DMOS transistors is 1.2Ω at 25°C.
- Does the L6204D have thermal shutdown protection?
- What is the commutation frequency range for the L6204D?
The commutation frequency range for the L6204D is up to 20 kHz.
- How are the bridges controlled in the L6204D?
Each bridge is controlled independently by 4 inputs (IN1, IN2, IN3, IN4) and 2 enable inputs (ENABLE1, ENABLE2).
- What type of logic inputs does the L6204D support?
The L6204D supports TTL/CMOS compatible logic inputs.
- Does the L6204D require an external heatsink for normal operation?
No, the L6204D does not require an external heatsink for normal operating temperatures, thanks to its heat-conducting pins.
- How does the bootstrap charge pump work in the L6204D?
The bootstrap charge pump supplies a voltage higher than the supply voltage (VS) to the high-side drivers using external capacitors and diodes.
- What is the purpose of the sense resistors in the L6204D?
The sense resistors are used to control the current level in constant current chopper applications.
- What kind of protection does the L6204D offer against cross conduction?
The L6204D has built-in protection against cross conduction, although current spikes can still occur due to charge/discharge phenomena.
- What is the dead time protection in the L6204D?
The dead time protection in the L6204D is 500 ns.
