AP3783

Document number: DS37429 Rev. 6 - 2

5 of 17

www.diodes.com

December 2015

© Diodes Incorporated

AP3783

Symbol

Parameters

Conditions

Min

Typ

Max

Unit

OPERATING FREQUENCY SECTION

The Maximum Operating Frequency

–

–

60

kHz

Maximum Off Time

691

768

845

μs

Sample Time

5.2

5.8

6.4

μs

(Note 6)

4.3

4.8

5.3

μs

(Note 6)

2.7

3

3.3

μs

(Note 6)

1.5

1.7

1.9

μs

FREQUENCY JITTER SECTION

ΔV

4.5

5

5.5

%

3.6

4

4.4

kHz

CURRENT SENSE SECTION

Peak Current Sense Threshold Voltage

828

900

972

mV

As Above

690

750

810

mV

As Above

(Note 6)

414

450

486

mV

As Above

(Note 6)

230

250

270

mV

Built-in Line Compensation Resistor

(Note 7)

245

260

275

Ω



Leading Edge Blanking

495

550

605

ns

CONSTANT VOLTAGE SECTION

Feedback Voltage

3.95

4.01

4.07

V

FB Pin Input Resistance

560

700

840

kΩ

Cable Compensation Ratio

AP3783A

6

7

8

%

AP3783B

3

4

5

%

AP3783C

9

10

11

%

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

–

3.61

3.68

3.75

V

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

–

13.5

16

18.5

μs

Short Circuit Protection

2.45

2.6

2.75

V

–

115

128

141

ms

Shutdown Temperature

–

+144

+160

+176

°C

Temperature Hysteresis

–

+36

+40

+44

°C

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

1

FB

LINE

REF

_

CS

V

R

R

R

438

.

0

V









Δ