Overview
The STMicroelectronics SRK2001TR is an adaptive synchronous rectification controller designed specifically for secondary side synchronous rectification in LLC (Inductor-Inductor-Capacitor) resonant converters. This controller is optimized for use in converters that employ a transformer with a center tap secondary winding for full wave rectification. It enhances efficiency, particularly in low-output-voltage, high-current power supplies, by driving power MOSFETs to replace traditional rectification diodes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Brand | STMicroelectronics | |
| Controller Type | Synchronous Rectifier Controller | |
| Number of Outputs | 1 | |
| Maximum Switching Frequency | 500 kHz | |
| Current Conversion Type | AC-DC | |
| Mounting Type | Surface Mount | |
| Package Type | SSOP-10 | |
| Pin Count | 10 | |
| Dimensions | 5 x 4 x 1.5 mm | |
| Maximum Input Voltage | 32 V | |
| Maximum Operating Temperature | +150 °C | |
| Minimum Operating Temperature | -40 °C | |
| Minimum Input Voltage | 4.5 V | |
| Supply Current-Max | 35 mA | |
| Power Dissipation | 0.75 W | |
| Duty Cycle-Max | 80% | |
| Rise Time | 140 ns | |
| Fall Time | 80 ns | |
| Storage Temperature Range | -55 °C to +150 °C | |
| Thermal Resistance | 130 °C/W |
Key Features
- Secondary side synchronous rectification controller optimized for LLC resonant converters.
- Dual gate driver for N-channel MOSFET, each capable of driving one or more MOSFETs.
- Adaptive turn-off logic and turn-on logic with adaptive masking time to maximize SR MOSFET conduction time.
- Auto-compensation of parasitic inductance.
- Low consumption mode with 50 μA quiescent current.
- High voltage drain-to-source Kelvin sensing for each SR MOSFET.
- Protection against current reversal and safe management of load transient, light-load, and startup conditions.
- Intelligent automatic sleep mode at light-load with user-programmable enter/exit load levels and soft transitions.
- Programmable exit load levels from burst mode.
- Compatible with standard level MOSFETs.
- Low external component count required.
Applications
The SRK2001TR is suitable for various applications, particularly in power supplies that require high efficiency and low output voltage. Some common applications include:
- Industrial power supplies.
- High-current, low-voltage DC-DC converters.
- LLC resonant converters with center tap secondary winding.
- Adapters and power supplies for consumer electronics.
- Power supplies in telecommunications and data centers.
Q & A
- What is the primary function of the SRK2001TR?
The SRK2001TR is an adaptive synchronous rectification controller designed for secondary side synchronous rectification in LLC resonant converters.
- What is the maximum switching frequency of the SRK2001TR?
The maximum switching frequency is 500 kHz.
- What type of package does the SRK2001TR use?
The SRK2001TR uses an SSOP-10 package.
- What is the operating temperature range of the SRK2001TR?
The operating temperature range is from -40 °C to +150 °C.
- How does the SRK2001TR manage power consumption in light-load conditions?
The SRK2001TR features a low consumption mode with 50 μA quiescent current and an intelligent automatic sleep mode to manage power consumption in light-load conditions.
- What type of MOSFETs can the SRK2001TR drive?
The SRK2001TR can drive N-channel power MOSFETs.
- Does the SRK2001TR require external compensation for parasitic inductance?
No, the SRK2001TR has auto-compensation for parasitic inductance.
- How does the SRK2001TR protect against current reversal?
The SRK2001TR includes protection against current reversal as part of its control scheme.
- Can the SRK2001TR be used in industrial applications?
- What is the maximum input voltage for the SRK2001TR?
The maximum input voltage is 32 V.
- Is the SRK2001TR RoHS compliant?
