Overview
The L6598 is a high voltage resonant controller manufactured by STMicroelectronics using BCD™ offline technology. This device is designed to handle voltage ratings up to 600 V, making it highly suitable for AC/DC adapters and applications where resonant topology is beneficial. The L6598 is intended to drive two power MOSFETs in a classical half-bridge topology and includes features such as a dedicated timing section for soft-start and minimum frequency settings, an error amplifier, and two enable inputs. The integrated bootstrap diode and Zener clamping on the low voltage supply minimize the need for external components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Vs) | 10 to 16.6 | V |
| Maximum Switching Frequency | 400 kHz | |
| Topology | Half-Bridge | |
| Maximum Duty Cycle | 52% | |
| Operating Temperature Range | -40°C to +125°C | |
| Storage Temperature Range | -40°C to +150°C | |
| Thermal Resistance (RthJA) | 120 °C/W (SO16), 80 °C/W (DIP16) | |
| Driver Current Capability | 250 mA source, 450 mA sink | |
| Switching Times (rise/fall) | 80/40 ns with 1 nF load | |
| Package Styles | SO16, DIP16 |
Key Features
- High voltage rail up to 600 V
- dV/dt immunity ±50 V/ns in full temperature range
- Driver current capability: 250 mA source, 450 mA sink
- Switching times: 80/40 ns rise/fall with 1 nF load
- CMOS shutdown input
- Undervoltage lockout
- Soft-start frequency shifting timing
- Sense op amp for closed loop control or protection features
- High accuracy current controlled oscillator
- Integrated bootstrap diode
- Clamping on Vs
Applications
The L6598 is particularly suited for AC/DC adapters and any application where a resonant topology is beneficial. It is also useful in various power supply designs, including desktop PC power supplies, TV power supplies, and other high-voltage power conversion applications.
Q & A
- What is the maximum voltage rating of the L6598?
The L6598 has a maximum voltage rating of up to 600 V.
- What is the maximum switching frequency of the L6598?
The maximum switching frequency of the L6598 is 400 kHz.
- What topology does the L6598 support?
The L6598 supports a half-bridge topology.
- What are the operating and storage temperature ranges for the L6598?
The operating temperature range is -40°C to +125°C, and the storage temperature range is -40°C to +150°C.
- What are the package styles available for the L6598?
The L6598 is available in SO16 and DIP16 packages.
- What is the driver current capability of the L6598?
The driver current capability is 250 mA source and 450 mA sink.
- What are the switching times for the L6598 with a 1 nF load?
The switching times are 80 ns rise and 40 ns fall with a 1 nF load.
- Does the L6598 have integrated protection features?
Yes, the L6598 includes features such as undervoltage lockout, soft-start frequency shifting timing, and a sense op amp for closed loop control or protection.
- What is the purpose of the integrated bootstrap diode in the L6598?
The integrated bootstrap diode reduces the need for external components by providing a bootstrap supply for the high-side driver.
- In what types of applications is the L6598 commonly used?
The L6598 is commonly used in AC/DC adapters and other applications where resonant topology is beneficial, such as desktop PC power supplies and TV power supplies.
