ROHM BM520Q25F

Description

BM520Q2xF is AC/DC converter with a built in FET which has a 650V withstand voltage for LED lighting. This IC is suitable for a Quasi-resonant switching typed High Side LED driver application, it can achieve a high accuracy of the LED current, and a low EMI at once. In addition, by embedding a PFC (Power Factor Correction) converter, it provides acountermeasure for harmonics.

Moreover, owing to the built-in bootstrap circuit with 650V withstand voltage, the low-power can be achieved. And owing to the external resistance for sensing the switching current, you may design thepower supply with a high degree of freedom. By the built-in bootstrap circuit and MOSFET, a compact application board with only a few components can be designed easily. So this IC is also suitable for alow cost strategy.

Features

• Quasi-resonant switching mode + PFC
• Built-in 650V bootstrap circuit
• Built-in 650V switching MOSFET
• Maximum frequency 150kHz
• VCC pin: under voltage protection
• VCC pin: over voltage protection (latch)
• SOURCE pin: Leading-Edge-Blanking function
• LED over current detection
• ZT pin: trigger mask function
• ZT pin: over voltage protection (latch)
• FET over current protection
• AC revision function for LED current detection

Typical applications

• LED bulb, seal typed LED lighting
• Electrical machineries for LED lighting

More information

• Datasheet
• IC product information