A6251中文资料ALLEGRO数据手册PDF规格书

FEATURES AND BENEFITS

■ 50 kHz PWM with ±5 Frequency Jittering

Cost Reduction of EMI Noise Filtering

■ Rugged 650 V Avalanche-Rated MOSFET

Simplified Surge Absorption

No VDSS Derating Required

■ Choice of rDS(on) (2.8 Ω or 3.95 Ω maximum)

■ Auto-Burst Mode for Stand-By Operation or Light Loads

Less Transformer Audible Noise

■ Built-In Leading Edge Blanking

■ Soft Start and Low Start-Up Current

Start-Up Circuit Disabled in Operation

■ Low Operating Current (4 mA max)

■ Automatic Burst Stand-By (intermittent operation)

Input Power <0.1 W at No Load

■ Auto-Bias Function

Stable Burst Operation Without Generating Interference

■ Internal Off-Timer Circuit

■ Built-In Constant-Voltage/Constant Current

■ Multiple Protections:

Pulse-by-Pulse Overcurrent Protection (OCP)

Overload Protection (OLP) with Auto Restart

Latching Overvoltage Protection (OVP)

Undervoltage Lockout (UVLO) with Hysteresis

Latching Thermal Shutdown (TSD)

■ Molded Small-Size 8-Pin Package

For Low-Height SMPS