Power chip

1W, input: 13.5～16.5V, output: ±15VDC, isolated and unregulated dual circuit

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2A single-cell lithium battery charging management IC

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Linear Regulator Withstand voltage: 40V, static power consumption: 1.4uA, current: 250mA, PSRR: 80db@1KHZ, low dropout voltage: 350mV@100mA

Valley switching converters typically have lower EMI and higher power conversion efficiency than traditional hard-switching converters with fixed switching frequency. The FSQ series is an integrated pulse width modulation (PWM) controller and SenseFET designed for valley switching operation with minimal external parts count. The PWM controller includes an integrated fixed frequency oscillator, undervoltage lockout, leading edge spacing (LEB), optimized gate drivers, internal soft-start, temperature compensated precision current source for loop compensation, and self-protection circuitry. Compared to discrete MOSFET and PWM controller solutions, the FSQ family reduces overall cost, parts count, size and weight; while improving energy efficiency, productivity and system reliability. This device is a basic platform for cost-effective designs of valley-switching flyback converters.

Constant on-time control\nUse of low ESR capacitors for loop stability\nAdjustable switching frequency 600kHz, 800kHz or 1MHz\nSelectable forced continuous mode or high efficiency mode at light load\nOutput pre-bias start\nDifferential Output voltage remote sampling\nOutput voltage discharge function\nOutput voltage tracking\nPower supply working status indication function\nConfigurable soft start time\nConfigurable output current limit\nShort circuit/overcurrent hiccup/protection Over temperature protection/ overvoltage protection

Voltage monitoring, threshold voltage=4.5V to 5.5V