AP39811

Document number: DS39992 Rev. 5 - 2

5 of 18

www.diodes.com

June 2019

© Diodes Incorporated

AP39811

Electrical Characteristics (@TA =+25°C, VCC = 15V, unless otherwise specified.)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

STARTUP AND UVLO SECTION

VTH_ST

Startup Threshold

—

14.5

16

17.5

V

VOPR(MIN)

Minimum Operating Voltage

—

6.1

6.8

7.5

V

STANDBY CURRENT SECTION

IST

Startup Current

VCC=VTH_ST-1V Before

Startup

—

1

3

A

ICC_OPR

Minimum Operating Current

Static Current

450

550

650

A

CURRENT SENSE SECTION



VCS_H

Peak Current Sense

Threshold Voltage

33% to 100% CC Load

540

600

660

mV

VCS_L

No Load to 3% CC Load

180

200

220

mV

RLINE

Built-In Line Compensation

Resistance

—

48

60

72



tLEB

Leading Edge Blanking

—

250

300

350

ns

CONSTANT VOLTAGE SECTION

VFB

Feedback Threshold

Voltage

Closed Loop Test of VOUT

2.3

2.35

2.4

V

RatioSAMPLE_L

Sample Ratio

No Load to 3% CC Load

50

55

60

%

RatioSAMPLE_H

Sample Ratio

33% to 100% CC Load

55

60

65

%

tSAMPLE_H

Sample Time When

tONS>15s

—

6.4

8

9.6

s

CONSTANT CURRENT SECTION

tONS/tSW

Secondary Winding

Conduction Duty

Tested @ VFB=1V

0.7

0.75

0.8

—



FREQUENCY JITTER



ΔVCS/VCS

VCS Modulation

No Load to Full Load

2.5

3

3.5

%

CABLE COMPENSATION



VCPR_CABLE_MIN

Minimum Cable

Compensation

AP39811A

1.33

1.4

1.47

V

AP39811B

2.04

2.14

2.24

V

VALLEY-ON SECTION

tVAL-ON

Valid Off Time of Valley-On

From the End of tONS

26

32

38

s

DYNAMIC SECTION

tOFF(MAX)

Maximum Off Time

AP39811A

0.9

1

1.1

ms

AP39811B

700

768

836

s

PROTECTION FUNCTION SECTION

VFB(OVP)

Over Voltage Protection at FB

Pin

—

3.3

3.6

3.9

V

VCC(OVP)

Over Voltage Protection at

VCC Pin

—

29.5

32

34.5

V

tONP(MAX)

Maximum Turn-On Time

—

12.8

16

19.2

s

VCS(MIN)

Minimum Peak Current Sense

Voltage at tONP=4s (First

Cycle)

—

80

100

130

mV

VCS(MAX)

Maximum CS Voltage

—

675

750

825

mV

VFB_NEG_L

Low Threshold for FB

Negative Voltage Protection

—

8.4

14

19.6

mV

VFB_NEG_H

High Threshold for FB

Negative Voltage Protection

—

25.2

42

58.8

mV