UPS602 datasheet(6/12 Pages) UTC

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UPS602 Datasheet(PDF) 6 Page - Unisonic Technologies

Part #	UPS602

Description	HIGH PERFORMANCE CURRENT MODE POWER SWITCH

Download	12 Pages

Scroll/Zoom	100%

Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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6 / 12 page

UPS602

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 12

www.unisonic.com.tw

QW-R119-005.I

FUNCTIONAL DESCRIPTION

The internal reference voltages and bias circuit work at VCC> VTHD (ON), and shutdown at VCC<VCC (MIN).

(1) Soft-Start

When every IC power on, driver output duty cycle will be decided by voltage VSS on soft-start capacitor and VCS

on current sense resistor at beginning. After VSS reach 4.2V, the whole soft-start phase end, and driver duty cycle

depend on VFB and VCS. The relation among VSS, VFB and VOUT as followed FIG.3.

Furthermore, soft-start phase should end before VCC reach VCC (MIN) during VCC power on. Otherwise, if soft-start

phase remain not end before VCC reach VCC (MIN) during VCC power on, IC will enter auto-restart phase and not set up

VOUT. So the value of CSS should be between 0.1μFand 4.7μF.

Finally soft-start also set OVP1 active phase. OVP1 active phase between 0 and VSS(DEACT), OVP1 will not be

sensed after VSS reach VSS(DEACT).The Soft-start phase TSS：TSS = 23.8×CSS (ms) (Example: CSS=0.47μF, then

TSS=23.8×0.47=11.2ms).

FIG.3 Soft-start phase

Manufacturer	Part #	Datasheet	Description
Unisonic Technologies	UPS602	258Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
E-Tech Electronics LTD	UPS602	582Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
Unisonic Technologies	UPS602-D08-T	258Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS602G-D08-T	582Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS602L-D08-T	258Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH

Manufacturer	Part #	Datasheet	Description
Unisonic Technologies	UPS601	257Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS602	258Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS3652	432Kb / 9P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS702	529Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS703	560Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UCS1651S	288Kb / 8P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UCS1704S	301Kb / 10P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	US1602	369Kb / 10P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UCS17005S	300Kb / 10P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS601	605Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH
	UPS602	582Kb / 12P	HIGH PERFORMANCE CURRENT MODE POWER SWITCH

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