UNISONIC TECHNOLOGIES CO., LTD

US3702

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 9

Copyright © 2015 Unisonic Technologies Co., Ltd

QW-R119-022.c

HIGH PERFORMANCE

CURRENT MODE POWER

SWITCH WITH ZERO

CURRENT DETECTION



DESCRIPTION

The UTC US3702 is an integrated PWM controller and

SenseFET specifically designed for switching operation with

minimal external components. The UTC US3702 is designed to

provide several special enhancements to satisfy the needs, for

example, Power-Saving mode for low standby power (<0.3W),

Frequency Hopping , Constant Output Power Limiting , Slope

Compensation ,Over Current Protection (OCP), Over Voltage

Protection (OVP), Over Load Protection (OLP), Under Voltage

Lock Out (UVLO), Short Circuit Protection (SCP) , Over

Temperature Protection (OTP) etc. IC will be shutdown or can

auto-restart in situations.



FEATURE

* Internal high voltage SenseFET(700V)

* Frequency hopping for Improved EMI performance.

* Lower than 0.3W standby power design

* Linearly decreasing frequency to 26KHz during light load

* Internal soft start

* Internal slope compensation

* Constant power limiting for universal AC input range

* Gate output maximum voltage clamp(15V)

* Over temperature protection

* Overload protection

* Over voltage protection

* Leading edge blanking

* Cycle-by-cycle current limiting

* Under voltage lock out

* Short circuit protection

DIP-8



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

US3702L-D08-T

US3702G-D08-T

DIP-8

Tube

(1) T: Tube

(2) D08: DIP-8

(3) L: Lead Free, G: Halogen Free and Lead Free

US3702L-D08-T

(1)Packing Type

(2)Package Type

(3)Green Package