Overview
The LM5033MM, produced by Texas Instruments, is a high-voltage PWM (Pulse Width Modulation) controller designed to implement push-pull, half-bridge, and full-bridge topologies. This controller is particularly useful in voltage-mode control applications and is packaged in a compact 10-pin MSOP or LLP package. It features an internal high-voltage start-up regulator, allowing it to operate over a wide input range from 15 V to 100 V, making it suitable for various high-voltage applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 15 V to 90 V (transient capability to 100 V) | V |
| VCC Output Voltage | 9.6 V | V |
| Oscillator Frequency | Up to 1 MHz | Hz |
| Gate Driver Output Current | 1.5 A (peak) | A |
| Deadtime | 85 ns to 185 ns | ns |
| Rise Time | 16 ns | ns |
| Fall Time | 16 ns | ns |
| Thermal Shutdown Temperature | 165°C | °C |
| Thermal Shutdown Hysteresis | 15°C | °C |
| Package Types | MSOP-10, LLP-10 |
Key Features
- Internal high-voltage (100 V) start-up regulator
- Single resistor oscillator setting
- Synchronizable oscillator
- Precision 2.5-V reference output
- Adjustable soft-start
- Overcurrent protection
- Direct optocoupler interface
- 1.5-A peak gate drivers
- Thermal shutdown
- Remote shutdown capability
Applications
- Intermediate DC-DC bus converters
- Telecommunication power converters
- Industrial power converters
- +42 V automotive systems
- Closed-loop voltage mode converters with highly regulated output voltage
- Open-loop DC transformers such as Intermediate Bus Converters (IBCs) with efficiency greater than 95%
Q & A
- What is the input voltage range of the LM5033MM?
The input voltage range is from 15 V to 90 V, with transient capability to 100 V.
- What is the output voltage of the internal high-voltage start-up regulator?
The output voltage of the internal high-voltage start-up regulator is 9.6 V.
- What is the maximum oscillator frequency of the LM5033MM?
The maximum oscillator frequency is up to 1 MHz.
- What is the peak current capability of the gate drivers?
The gate drivers can source and sink up to 1.5 A peak.
- What are the typical rise and fall times of the output drivers?
The typical rise and fall times are both 16 ns.
- What is the thermal shutdown temperature of the LM5033MM?
The thermal shutdown temperature is 165°C.
- Can the LM5033MM be synchronized to an external clock?
- What types of packages are available for the LM5033MM?
The LM5033MM is available in MSOP-10 and LLP-10 packages.
- What are some common applications of the LM5033MM?
- How does the soft-start feature work in the LM5033MM?
The soft-start feature is controlled by the SS pin, which uses an internal 10 µA current source and an external capacitor to set the soft-start timing. The output drivers are disabled until the soft-start capacitor is fully charged.
