FP3842

Technology FP3842 OFF-LINE CURRENT MODE PWM CONTROL IC GENERAL DESCRIPTION The FP3842, a 1-chip composed of high-current totem pole output circuits with a PWM latch, current sense comparator and an error amplifier, the FP3842 contains a 5V precision voltage reference regulator, under-voltage lockout circuit (UVLO), oscillator circuit and a green power function, applied to offer space and low cost in many applications such as the DC/DC converter and off-line green mode adaptor or switching power supply. FEATURES Precision Reference Voltage: 5.0V (±2%) Low start-up current: typ. 120uA High current totem pole output: typ. 700mA Internal temperature compensated oscillator Double pulse suppression UVLO with Hysteresis function Oscillator Frequency: Max. 500KHz Package: PDIP8 / SOP8 TYPICAL APPLICATION DC-DC Converter SMPS AC-DC Adaptor PDIP8 SOP8 Rev0.2 May.06, 2005 P1/FP3842 Technology FUNCTIONAL BLOCK DIAGRAM FP3842 UVLO 38V Circuits 16V: ON 10V: OFF 2.5V Reference Oscillator...