UC3848

UNISONIC TECHNOLOGIES CO., LTD UC3848 LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE CURRENT MODE CONTROLLERS „ DESCRIPTION The UTC UC3848 is designed to provide several special enhancements to satisfy the needs: Power-Saving mode for low standby power, Over Current Protection (OCP), Over Voltage Protection (OVP), Over Load Protection (OLP), Over Temperature Protection (OTP) etc protection features. IC will be shutdown when either protection arise and can auto-restart. UVLO featuring typical start-up current 20µA, and VCC(ON) 12.6V, VCC(OFF) 8.1 . Lower typical operation current Icc 3.7mA at inactive output. The output stage, suitable for driving N-Channel MOSFETs, can operate to duty cycles approach 70%. The UC3848 are fully pin-to-pin compatible with UC3842 except VREF-pin and NC-pin. VREF-pin’s application as application circuits. Pin FB with an 4kΩ pull up resistor to internal reference voltage. The UC3848 also have soft-start function avoiding overshoot, and controlled driver output rise edge time tR for low EMI. „ FEATURES * Low startup and operation current * 68kHz switching frequency * Max duty cycle 70% * Power-saving mode for low power * Under voltage lockout with hysteresis * Over temperature protection * Overload protection * Over voltage protection * Leading edge blanking * Soft start „ ORDERING INFORMATION Ordering Number Normal Lead Free Plating UC3848-D08-T UC3848L-D08-T UC3848-S08-R UC3848L-S08-R UC3848-S08-T UC3848L-S08-T Package DIP-8 SOP-8 SOP-...