AP3783R

Document number: DS37448 Rev. 5 - 2

5 of 17

www.diodes.com

October 2015

© Diodes Incorporated

AP3783R

C, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

FREQUENCY JITTER

ΔV

4.5

5

5.5

%

3.6

4

4.4

kHz

CURRENT SENSE SECTION

Peak Current Sense Threshold

Voltage

828

900

972

mV

460

500

540

mV

Built-in Line Compensation Resistor

(Note 7)

245

260

275



Leading Edge Blanking

(Note 6)

400

500

600

ns

CONSTANT VOLTAGE SECTION

Feedback Threshold Voltage

3.95

4.01

4.07

V

FB Pin Input Resistance

560

700

840

k



Cable Compensation Ratio

AP3783RA

7

8

9

%

AP3783RB

3

4

5

%

AP3783RC

1

2

3

%

CONSTANT CURRENT SECTION



Secondary Winding Conduction

Duty

0.47

0.5

0.53

–



VALLEY-ON SECTION



Valid Off Time of Valley-on

14.4

16

17.6

μs



DYNAMIC SECTION



Trigger Voltage for Dynamic

Function

–

74

83

92

mV

Delay Time for Dynamic Function

115

128

141

μs

–

3.82

3.89

3.96

V



Maximum Off Time

–

6

8

10

ms

PROTECTION FUNCTION SECTION

Over Voltage Protection at FB Pin

–

7.1

7.5

7.9

V

Over Voltage Protection at VCC Pin

–

28

30

32

V

Maximum Turn-on Time

–

13

19

25

μs

Short Circuit Protection

2.45

2.6

2.75

V

–

115

128

141

ms

Shutdown Temperature

–

+126

+140

+154

ºC

Temperature Hysteresis

–

+36

+40

+44

ºC

Notes:

5. The output constant-current design value, generally set to 110% to 120% of full load.

6. Guaranteed by design.

7. Line compensation voltage on CS reference:

AUX

LINE

FB

LINE

REF

CS

V

R

R

R

V









1

_

438

.

0

Δ