DESCRIPTION
●The LTC® 1871-7 is a current mode, boost, flyback and SEPIC controller optimized for driving 6V-rated MOSFETs in high voltage applications. The LTC1871-7 works equally well in low or high power applications and requires few components to provide a complete power supply solution. The switching frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin.
●FEATURES
●■ Optimized for High Input Voltage Applications
●■ Wide Chip Supply Voltage Range: 6V to 36V
●■ Internal 7V Low Dropout Voltage Regulator Optimized for 6V-Rated MOSFETs
●■ Current Mode Control Provides Excellent Transient Response
●■ High Maximum Duty Cycle (92% Typ)
●■ ±2% RUN Pin Threshold with 100mV Hysteresis
●■ ±1% Internal Voltage Reference
●■ Micropower Shutdown: IQ= 10µA
●■ Programmable Operating Frequency (50kHz to 1MHz) with One External Resistor
●■ Synchronizable to an External Clock Up to 1.3 ×fOSC
●■ User-Controlled Pulse Skip or Burst Mode® Operation
●■ Output Overvoltage Protection
●■ Can be Used in a No RSENSETM Mode for VDS< 36V
●■ Small 10-Lead MSOP Package
●APPLICATIONS
●■ Telecom Power Supplies
●■ 42V Automotive Systems
●■ 24V Industrial Controls
●■ IP Phone Power Supplies
