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BP3519 PSR Isolated CCCV Driver IC - BP Semi - Regency Semiconductors

🔌 BP3519 PSR Isolated CCCV Driver IC – Now in Stock

We are pleased to announce the availability of the BP3519 primary side regulation (PSR) isolated constant current/constant voltage (CCCV) driver IC from Bright Power Semiconductor (BPSemi). This highly efficient and versatile IC is designed for chargers, standby power supplies, and LED drivers, delivering exceptional performance with minimal external components.

With standby power less than 100mW, ±5% output accuracy, and PWM/PFM multiple mode control, the BP3519 is the ideal solution for energy-efficient, compact power supply designs.

🔌 What is the BP3519?

The BP3519 is a primary side regulation (PSR) isolated CCCV driver IC designed for offline flyback converters. It operates in discontinuous conduction mode (DCM) and supports PWM and PFM multiple control modes, optimizing efficiency across all load conditions while minimizing standby power and no-load audible noise.

With ±5% output accuracy and no external compensation capacitor required, the BP3519 simplifies design, reduces BOM size, and lowers system cost.

✨ Why Choose the BP3519?

🔋 Ultra-Low Standby Power – < 100mW standby power meets strict energy efficiency standards
🎯 High Accuracy – ±5% output accuracy for both constant current and constant voltage modes
🔄 Multiple Control Modes – PWM/PFM mode switching optimizes efficiency across all load conditions
🔌 PSR Isolated CCCV Control – Primary side regulation eliminates the need for an optocoupler
📦 No External Compensation Capacitor – Simplifies design and reduces BOM size
🛡️ Rich Protection Features – Load open/short protection, VCC under/over voltage protection, and over-temperature protection
📐 SOT23-5L Package – Compact package ideal for space-constrained designs
🔇 Low No-Load Noise – Minimizes audible noise in light load conditions

🔊 Applications

The BP3519 is ideal for:

Chargers – Battery chargers for mobile devices and power banks
Standby/Auxiliary Power Supplies – Always-on power for TVs, monitors, and appliances
LED Drivers – Constant current LED lighting applications
Any CCCV Application – Designs requiring both constant current and constant voltage regulation

📦 Key Specifications

Part Number: BP3519
Brand: Bright Power Semiconductor (BPSemi)
Package: SOT23-5L
Input Voltage: 85V–265V AC
Standby Power: < 100mW
Output Accuracy: ±5%
VCC Turn-On Threshold: 15.3V
VCC UVLO Threshold: 7.6V
VCC OVP Threshold: 29V
CS Peak Threshold: 600mV (typical)
Leading Edge Blanking: 500ns
Maximum Operating Frequency: 65kHz
Gate Clamping Voltage: 13V
Thermal Shutdown: 150°C
ESD Rating: 2kV (HBM)

🛡️ Protection Features

Load Open Protection – Output overvoltage protection via FB pin
Load Short Protection – Frequency clamped to 20kHz to reduce MOSFET stress
VCC Under Voltage Protection – System restarts when VCC drops below UVLO threshold
VCC Over Voltage Protection – Protects against excessive supply voltage
Over-Temperature Protection – Thermal shutdown at 150°C with 30°C hysteresis
Cycle-by-Cycle Peak Current Control – Monitors and limits current every cycle