AP3983R

Document number: DS38247 Rev. 3 - 2

5 of 15

www.diodes.com

June 2016

© Diodes Incorporated

AP3983R

Symbol

Parameter

Condition

Min

Typ

Max

Unit

FREQUENCY JITTER

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

Ω



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

Ω

Cable Compensation Ratio

7

8

9

%

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



POWER MOSFET SECTION

Drain-Source Breakdown Voltage

–

700

–

–

V

On State Resistor

–

–

–

1.4



PROTECTION FUNCTION SECTION

Overvoltage Protection at FB Pin

–

7.1

7.5

7.9

V

Overvoltage 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

–

+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

FB

LINE

REF

CS

V

R

R

R

V









1

_

438

.

0

Δ