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The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters.
Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET's turn-on.
Converter's power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant.
The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection.主要特性
- TV/MONITOR SMPS
- BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT
- DIGITAL CONSUMER
- AC-DC ADAPTERS/CHARGERS
- PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS
- 1% PRECISION (@ Tj = 25˚C) INTERNAL REFERENCE VOLTAGE
- DISABLE FUNCTION (ON/OFF CONTROL)
- QUASI-RESONANT (QR) ZERO-VOLTAGE-SWITCHING (ZVS) TOPOLOGY
- FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY
- LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE
- ULTRA-LOW START-UP (< 70µA) AND QUIESCENT CURRENT (< 3.5mA)
- ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
- PULSE-BY-PULSE & HICCUP-MODE OCP
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| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L6565D | 批量生产 | SO-8 | Industrial | Ecopack2 (**) | |
| L6565DTR | 批量生产 | SO-8 | Industrial | Ecopack2 (**) | |
| L6565N | 批量生产 | DIP-8 | Industrial | Ecopack2 | |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
