AP3844C Datasheet | Shanghai SIM-BCD Semiconductor

Description Features Data Sheet AP384XC The AP3842C/3C/4C/5C are high performance fixed frequency current-mode PWM controller series. These integrated circuits are optimized for off-line and DC-DC converter applications with minimum external ponents. They feature under-voltage lockout (UVLO) circuit with low start-up current, trimmed oscillator for precise duty cycle control, current sense parator providing maximum current limiting and a totem pole output stage for increasing output current. In addition, these ICs also feature accurate protection against over-temperature, over-current and maximal output power. The AP3842C and AP3844C have UVLO thresholds of 16V(on) and 10V(off); The corresponding thresholds for AP3843C and AP3845C are 8.4 V(on) and 7.6V(off). - Low Start-up Current: 50μA - Robust VREF Line/Load Regulation Low Line Regulation : 4m V Low Load Regulation : 4m V - High Stability of Reference Voltage over a Full Temperature Range: 0.2m V/ o C - Operating Frequency up to 500k Hz - High PWM Frequency Stability over a Full Temperature Range: 2.5% - High PWM Frequency Stability under a Full Supply Voltage Range: 0.2% - Accurate Over-temperature Protection with Hysteresis - UVLO with Hysteresis Applications The AP3842C and AP3843C can operate approaching - Off-line Converter 100% duty cycle; AP3844C and AP3845C can operate - DC-DC Converter from zero to 50% duty cycle. - Voltage Adapter - CRT Monitor Power Supply These ICs are available in SOIC-8 and DIP-8 pack- - Desktop Power Supply ages. - DVD/STB Power Supply Option 1 SOIC-8 Option 2 DIP-8 Figure 1. Package Types of AP3842C/3C/4C/5C Jul. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited CURRENT MODE PWM CONTROLLER Pin Configuration M Package (SOIC-8) P 1 VFB ISENSE RT/CT 2 3 4 8 VREF 7 VCC 6 OUTPUT 5 GND Data Sheet...