APW1172 datasheet(4/21 Pages) ANPEC

4 / 21 page

Rev. A.4 - Aug., 2005

APW1172

www.anpec.com.tw

APW1172

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Dynamic Characteristics

1.22

1.235

1.25

VFB

Voltage feedback

APW1172

4.8V < VCC < 22V, 20Ma < IO < 2A

* 1.198 1.235 1.272

Efficiency

VO = 5V, VCC = 12V, IOUT = 1A

DC Characteristics

Iqop

Total Operating Quiescent Current

Quiescent Current

Duty Cycle = 0; VFB = 1.5V

VINH > 2.2V

100

µA

Iqst-by Total Stand-by Quiescent Current

VCC = 22V; VINH > 2.2V

150

µA

Inhibit

Device ON

1.1

1.3

1.5

VINH

INH Threshold Voltage

Device OFF

1.2

1.4

1.6

INH Pull-Up Current

VINH < 3V

µA

Maximum INH Voltage

IINH = 0A

4.3

Error Amplifier

VOH

High Level Output Voltage

VFB = 1V

3.5

3.8

VOL

Low Level Output Voltage

VFB = 1.5V

0.4

IO source Source Output Current

VCOMP = 1.9V; VFB = 1V

200

300

µA

IO sink Sink Output Current

VCOMP = 1.9V; VFB = 1.5V

1.5

IFB

Source Bias Current

VFB = 1.5V

2.5

µA

Maximum FB Voltage

IFB = 0

µA

2.1

Trans-conductance

VFB = 1.255V to 1.215V, ICOMP =

-0.1mA to 0.1mA VCOMP = 1.9V

2.3

mA/V

SYNC Function

High Input Voltage

VCC = 4.8 to 22V

2.5

VREF

Low Input Voltage

VCC = 4.8V to 22V

0.74

VSYNC = 0.74V

0.11

0.25

Slave Sink Current

VSYNC = 2.33V

0.21

0.45

Master Output Amplitude

ISOURCE = 3mA

2.75

Output Pulse Width

No load, VSYNC = 1.65V

0.2

0.35

µs

Electrical Characteristics (Cont.)

The * denotes the specifications that apply over TA = -40 ~ 85oC. Typical values are at TA = 25oC.

VCC = 12V unless otherwise specified.

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