US3706 Datasheet | Unisonic Technologies

DESCRIPTION The UTC US3706 bines a dedicated current mode PWM controller with a high voltage power MOSFET. Low VDD startup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power. At no load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for Higher conversion efficiency at light load condition. The UTC US3706 offers plete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), over voltage protection and VDD under voltage lockout (UVLO). The internal slope pensation improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which offering minimal external ponent count in the design. Excellent EMI performance is achieved with UTC proprietary frequency hopping technique (ZL201020615247.1) together with soft driver control. Audio noise is eliminated due to switch frequency more than 20k Hz during operation. The US3706 has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet printers, open-frame SMPS. - FEATURES - UTC proprietary frequency hopping technology for - OLP,OVPand OTP for higher security Improved EMI performance. - Fixed switch frequency 65k Hz - Power-saving mode for high light-load and standby - Low start-up current efficiency - Cycle-by-cycle Current Limiting - Soft Start - Under voltage lockout (UVLO) - Dynamic peak current limiting for constant output power - Leading edge blanking on source input - Built-in synchronized slope pensation - Few external ponents required TO-220F-6 - ORDERING INFORMATION Ordering Number Lead Free Halogen Free US3706L-TF6-T US3706G-TF6-T Package TO-220F-6 Packing Tube .unisonic..tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 8 QW-R129-001.b...