US3706 datasheet(7/8 Pages) UTC

7 / 8 page

US3706

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

7 of 8

www.unisonic.com.tw

QW-R129-001.b



TYPICAL APPLICATION CIRCUIT

GND

DRAIN

VDD

SOURCE

F1 3

LF1

LF2

BD1

R23

RM-8

R41

R40 C40

C41

C42

C43

VOUT+

VOUT GND

R42

R43

C45

R47

R46

C46

CY1

R13

C10

R20

R21

R22

RT1

R12

C12

R45

BOM

Reference

Component

Reference

Component

BD1

2A_600V

R6, R2

Resistor, chip,1.5M, 1/4W,±5%, SMD1206

Capacitor, aluminum

electrolytic,33uF/400V, 105

℃,±20%

R7, R8

Resistor, chip,180K, 1/4W,±5%, SMD1206

Capacitor, ceramic, 1000pF/1KV, NPO,

SMD1206

R13

Resistor, chip,4.7-, 1/8W,±5%, SMD0805

Capacitor, ceramic, 1nF/50V, X7R,

SMD0805

R18

Resistor, chip,1K, 1/8W,±5%, SMD0805

C10

Capacitor, aluminum

electrolytic,10uF/50V; 105℃,±20%

R20, R21

Resistor, chip, 1.8-, 1/4W,±5%, SMD1206

C7, C46

Capacitor, ceramic, 0.1uF/50V, X7R,

SMD0805

R40

Resistor, chip, 47-, 1/4W,±5%, SMD1206

C11

Capacitor, ceramic, 68pF/50V, X7R,

SMD0805

R41

Resistor, chip,820-, 1/10W,±5%, SMD0603

C43

Capacitor, aluminum electrolytic,

680uF/25V, 105

℃,±20%

R42

Resistor, chip,2.2K, 1/10W,±5%, SMD0603

C45

Capacitor, ceramic, 10NF/50V, X7R,

SMD0805

R43

Resistor, chip,300-, 1/10W,±1%, SMD0603

CX1

Capacitor, X2, 0.33uF/275VAC,

105

℃ ,±20%

R45

Resistor, chip,39K, 1/10W,±1%, SMD0603

CY1

Capacitor, Y1, 1000pF/400V, 105

℃,±20%

R47

Resistor, chip,10K, 1/10W,±1%, SMD0603

C40

Capacitor, ceramic, 100pF/200V, ±20%,

SMD1206

Transformer, RM-8

Diode , fast recovery, 1N4007,

1.0A/1000V

IC, PWM controller, UTC US3706,

TO-220F-6

Diode , fast recovery, BAV20WG,

SOT-123

IC, TL431 SOT-23

Diode, MGBR20L60CG, 20A/60V,TO-220

IC, Opto-Coupler, LTV-357-T-C, SMD

Fuse, 3.15A / 250V

Component

C1, C41, C42, C5, R1, R2, R3, R5, R12,

R22, R47

LF1, LF2

choke

PCB

32mmX71mmX1.6mm

US3706 Datasheet(PDF) 7 Page - Unisonic Technologies

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