SG1845J/883B

The SG1846J/12927 is designed as one kind of current mode PWM controller device that provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components.

Features of the SG1846J/12927 are:(1)optimized for off-line control; (2)low start-up current (<1mA); (3)automatic feed forward compensation; (4)trimmed oscillator discharge current; (5)pulse-by-pulse current limiting; (6)enhanced load response characteristics; (7)under-voltage lockout with 6V hysteresis (SG1844 only); (8)double pulse suppression; (9)high-current totem-pole output; (10)internally trimmed bandgap referencE; (11)500kHz operation; (12)undervoltage lockout: SG1844 - 16 volts; (13)low shoot-through current <75mA over temperature.

The absolute maximum ratings of the SG1846J/12927 can be summarized as:(1)Supply Voltage: Self Limiting;(2)Supply Voltage (Low Impedance Source): 30 V;(3)Analog Inputs (Pins 3, 4, 5, 6, & 16): -0.3V to +6.3V;(4)Output Current (Peak): ±1 A;(5)Output Current (Continuous): 350 mA;(6)Operating Junction Temperature: 150°C;(7)Storage Temperature Range: -65°C to 150°C;(8)Lead Temperature (Soldering, 10 Seconds): 300°C. If you want to know more information about the SG1846J/12927, please download the datasheet in www.seekic.com or www.chinaicmart.com .