Overview
The NCL30188BDR2G from onsemi is a highly integrated power factor corrected quasi-resonant primary side current-mode controller designed specifically for isolated and non-isolated smart-dimmable constant-current LED drivers. This controller supports flyback, buck-boost, and SEPIC topologies, ensuring near-unity power factor and tight regulation of the LED current from the primary side. This eliminates the need for secondary-side feedback circuitry or an optocoupler, making it ideal for compact and space-efficient designs.
Key Specifications
| Parameter | Symbol | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|---|
| Maximum Power Supply Voltage (VCC pin) | VCC(MAX) | - | -0.3 | 30 | V |
| Maximum Driver Pin Voltage (DRV pin) | VDRV(MAX) | - | -0.3 | 30 | V |
| Maximum Current for VCC Pin | ICC(MAX) | - | - | Internally limited | mA |
| Startup Current | ICC(start) | 13 | - | 30 | μA |
| Operating VCC Range | VCC | 9.4 - 25.5 | - | - | V |
| Thermal Shutdown Temperature | TSHDN | 150 | 130 | 170 | °C |
| Thermal Shutdown Hysteresis | TSHDN(HYS) | - | - | 50 | °C |
Key Features
- Quasi-resonant Peak Current-mode Control Operation
- Constant Current Control with Primary Side Feedback
- Tight LED Constant Current Regulation of ±2% Typical
- Power Factor Correction
- Line Feedforward for Enhanced Regulation Accuracy
- Low Start-up Current (13 μA typical)
- Wide VCC Range
- 300 mA / 500 mA Totem Pole Driver with 12 V Gate Clamp
- Robust Protection Features:
- Over Voltage Protection (OVP) on VCC
- Programmable Over Voltage / LED Open Circuit Protection
- Cycle-by-cycle Peak Current Limit
- Winding Short Circuit Protection
- Secondary Diode Short Protection
- Output Short Circuit Protection
- Shorted Current Sense Protection
- User Programmable NTC Based Thermal Foldback
- Thermal Shutdown
- Vcc Undervoltage Lockout
- Brown-out Protection
- Pb-Free, Halide-Free Product
- Latching-off (NCL30188A) or 4-s Auto-recovery (NCL30188B) Protection Modes
Applications
- Integral LED Bulbs and Tubes
- LED Light Engines
- LED Drivers/Power Supplies
- Electronic Control Gear for LED Lighting
Q & A
- What is the primary function of the NCL30188BDR2G controller?
The NCL30188BDR2G is a power factor corrected quasi-resonant primary side current-mode controller designed for isolated and non-isolated smart-dimmable constant-current LED drivers.
- What topologies does the NCL30188BDR2G support?
The controller supports flyback, buck-boost, and SEPIC topologies.
- What is the typical startup current of the NCL30188BDR2G?
The typical startup current is 13 μA.
- What is the operating VCC range for the NCL30188BDR2G?
The operating VCC range is from 9.4 V to 25.5 V.
- What kind of protection features does the NCL30188BDR2G offer?
The controller includes robust protection features such as OVP, cycle-by-cycle peak current limit, winding short circuit protection, secondary diode short protection, output short circuit protection, and more.
- How does the thermal foldback work in the NCL30188BDR2G?
The thermal foldback is user-programmable using an NTC connected between the SD and GND pins, allowing for adjustable thermal current foldback threshold and slope.
- What are the typical applications of the NCL30188BDR2G?
Typical applications include integral LED bulbs and tubes, LED light engines, LED drivers/power supplies, and electronic control gear for LED lighting.
- Is the NCL30188BDR2G Pb-Free and Halide-Free?
- What are the protection modes available for the NCL30188BDR2G?
The controller offers latching-off (NCL30188A) or 4-s auto-recovery (NCL30188B) protection modes.
- How does the line feedforward feature enhance regulation accuracy?
The line feedforward feature helps in enhancing regulation accuracy by converting the input voltage rail observations into a current offset, thus improving the overall control and stability of the LED current.
- What is the thermal shutdown temperature of the NCL30188BDR2G?
The thermal shutdown temperature is typically 150°C.
