SG3842G データシートの表示（PDF） - Unspecified

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SG3842G

BiCMOS Green-Mode PWM Controllers

Unspecified 

BiCMOS Green-Mode PWM Controllers

OPERATING CONDITIONS

Symbol

Vcc

CT

RT

fOSC

Ta

Parameter

Supply voltage

Oscillation timing capacitor

Oscillation timing resistor

Oscillation frequency

Operating ambient temperature

ELECTRICAL CHARACTERISTICS

Product Specification

SG3842G/ SG3843G

Min.

-

0.47

2.0

10

-40

Max.

20

10

100

500

105

Unit

V

nF

kΩ

kHz

°C

Reference Voltage Section

Symbol

Vref

Line

Load

Vtc

Ios

Vref

Vn

S

Parameter

Reference output voltage

Line regulation

Load current regulation

Temperature stability

Short-circuit output current

Total output variation

Output noise voltage

Long term stability

Test Condition

Ta=25°C, Io=1mA

Vcc=10 to 20V

Io=1mA to 20mA

-

-

Line, Load, Temperature

f=10Hz to 10kHz , Ta=25°C

Ta=125°C for 1000 hours

Min.

4.75

-

-

-

-30

4.75

-

-

Typ.

5.0

2

20

0.5

-85

5.0

50

5

Max.

5.25

20

50

-

-180

5.25

-

25

Unit

V

mV

mV

mV/°C

mA

V

uV

mV

Oscillator Section (VFB=0V, SENSE=0V)

Symbol Parameter

Test Condition

FOSC

Oscillator frequency

SG3842G, SG3843G

SG3842G2

FOSC-G

Vcomp,H

Green-mode frequency (note 1)

Comp Voltage that initiates Green-mode

Vsense=0V

SG3842G

SG3842G2, SG3843G

Vcomp,L

Comp Voltage that shuts down PWM

SG3842G

SG3842G2, SG3843G

fdv

Frequency change with Vcc

Vcc=10 to 20V

fdt

Frequency change with temp.

Ta=-40 to 85°C

IDISCHG

Discharge current

Ta=25°C

Note 1: FOSC-G is the last PWM frequency before completely turned off @ Vcc=15V

Min.

49

49

8

-

-

7

Typ.

52

52

12

2.60

2.00

1.40

1.30

0.2

0.02

9

Max.

55

54

16

1

-

12

Unit

kHz

kHz

kHz

V

V

V

V

%

%/°C

mA

Error Amplifier Section

Symbol

VFB

Iib

Avol

BW

PSRR

Isource

Isink

VH COMP

VL COMP

Parameter

Input voltage

Input bias current

Open-loop voltage gain

Unity gain bandwidth

Power supply rejection ratio

Output source current

Output sink current

Output voltage

Output voltage

Test Condition

Comp=2.5V

-

-

-

-

FB=2.3V,COMP=0V

FB=2.7V,COMP=1V

FB=2.3V, RL=15K to GND

FB=2.7V, RL=15K to VREF

Min.

2.45

-

45

0.7

50

-0.8

2

6

-

Typ.

2.5

-

55

1.2

-

-1.8

6.5

6.6

-

Max.

2.55

0.1

-

-

-

-3

-

-

700

Unit

V

uA

dB

MHz

dB

mA

mA

V

mV

Current Sense Section

Symbol

AV

Parameter

Current sense input voltage gain (n)

© System General Corp.

Version 1.4 ( IRO33.0007.B3)

Test Condition

SG3842G

-4-

Min.

4.60

Typ.

5.00

Max. Unit

5.40

V/V

www.sg.com.tw

Jun.28,2004

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