特点
High Voltage: Operation Up to 60V
High Current: N-Channel Drive Handles Up to 10,000pF Gate Capacitance
Programmable Average Current Limiting
5V Reference Output with 10mA External Loading Capability
Fixed Frequency Current Mode Operation
Oscillator Synchronizable Up to 200kHz
Undervoltage Lockout with Hysteresis
Programmable Start Inhibit for Power Supply Sequencing and Protection
User Adjustable Slope Compensation
典型应用
典型应用
描述
The LT1680 incorporates programmable average current limiting allowing accurate limiting of DC current in the magnetics, independent of ripple current. User adjustable slope compensation provides stable operation at duty cycles up to 90%.
The LT1680 operating frequency is programmable and can be synchronized up to 200kHz. Minimum off-time operation provides switch protection. The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions.