Overview
The NCV4390DR2G, produced by onsemi, is an advanced Pulse Frequency Modulated (PFM) controller designed for LLC resonant converters with Synchronous Rectification (SR). This controller is optimized for high-efficiency isolated DC/DC converters and is particularly suited for automotive applications. It employs a current mode control technique based on charge control, which enhances the dynamic response and simplifies the feedback loop design of the power stage. The device features a wide operating frequency range, adaptive synchronous rectification control, and various protection functions to ensure reliable operation under diverse conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Pin Supply Voltage to GND | 0 | - | 18 | V |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Startup Supply Current (ISTARTUP) | 80 | 115 | - | µA |
| Operating Current (IDD) | - | 2.8 | - | mA |
| VDD ON Voltage | 9 | 10 | 11 | V |
| VDD OFF Voltage | - | 8.6 | - | V |
| Minimum Switching Frequency (fOSC.min) | 36 | 39 | 42 | kHz |
| Maximum Switching Frequency (fOSC.max) | 635 | 690 | 735 | kHz |
| Package Type | - | - | SOIC-16 | - |
Key Features
- Secondary Side PFM Controller for LLC Resonant Converter with Synchronous Rectifier Control
- Charge Current Control for Better Transient Response and Easy Feedback Loop Design
- Adaptive Synchronous Rectification Control with Dual Edge Tracking
- Closed Loop Soft-Start for Monotonic Rising Output
- Wide Operating Frequency Range (39 kHz ~ 690 kHz)
- Green Functions to Improve Light-Load Efficiency:
- Symmetric PWM Control at Light-Load to Limit the Switching Frequency while Reducing Switching Losses
- Disabling SR at Light-Load Condition
- Protection Functions with Auto-Restart:
- Over-Current Protection (OCP)
- Output Short Protection (OSP)
- Non Zero-Voltage Switching Prevention (NZS) by Compensation Cutback (Frequency Shift)
- Power Limit by Compensation Cutback (Frequency Shift)
- Overload Protection (OLP)
- Programmable Dead Times for Primary Side Switches and Secondary Side Synchronous Rectifiers
- VDD Under-Voltage Lockout (UVLO)
- Wide Operating Temperature Range (-40°C to +125°C)
- Automotive Qualified to AEC-Q100 Grade 1
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
- Automotive On Board Charger
- EV High Voltage DC/DC Converters
Q & A
- What is the primary function of the NCV4390DR2G?
The NCV4390DR2G is a Pulse Frequency Modulated (PFM) controller for LLC resonant converters with Synchronous Rectification (SR), designed for high-efficiency isolated DC/DC converters.
- What is the operating frequency range of the NCV4390DR2G?
The operating frequency range is from 39 kHz to 690 kHz.
- What protection features does the NCV4390DR2G include?
The device includes Over-Current Protection (OCP), Output Short Protection (OSP), Non Zero-Voltage Switching Prevention (NZS), Power Limit by Compensation Cutback, and Overload Protection (OLP) with auto-restart.
- What is the significance of the charge current control in the NCV4390DR2G?
The charge current control improves the dynamic response of the LLC resonant converter by comparing the total charge of the switch current to the control voltage, thus modulating the switching frequency.
- What is the package type of the NCV4390DR2G?
The device is packaged in a SOIC-16 case.
- What are the key applications of the NCV4390DR2G?
The key applications include automotive on-board chargers and EV high voltage DC/DC converters.
- What is the operating junction temperature range of the NCV4390DR2G?
The operating junction temperature range is from -40°C to +125°C.
- Is the NCV4390DR2G compliant with automotive standards?
Yes, it is automotive qualified to AEC-Q100 Grade 1.
- What environmental compliance does the NCV4390DR2G meet?
The device is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant.
- How does the NCV4390DR2G improve light-load efficiency?
The device improves light-load efficiency through symmetric PWM control and disabling SR at light-load conditions.
