AP3790 datasheet(5/17 Pages) DIODES

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AP3790

Document number: DS37221 Rev. 3 - 2

5 of 17

www.diodes.com

October 2014

AP3790

A Product Line of

Diodes Incorporated

Electrical Characteristics (@VCC = 12V, TA = +25°C, unless otherwise specified.) (Cont.)

Symbol

Parameters

Conditions

Min

Typ

Max

Unit

VFB@3.8V

Feedback Threshold Voltage

–

3.03

3.11

3.19

VFB@3.6V

2.89

2.96

3.03

RFB

FB Pin Input Resistance

VFB=4V

560

700

840

kΩ

VCABLE/VOUT%

Cable Compensation Ratio@5V

–

CONSTANT CURRENT SECTION

tONS/tSW

Maximum Secondary Duty Cycle

VFB=2V (Note 5)

0.47

0.5

0.53

–

DYNAMIC SECTION

VUV_H

Under Voltage of Feedback Pin for VCS_H

(Note 5)

3.61

3.68

3.75

OUTPUT VOLTAGE SELECTION SECTION

VCPC_L

Current Control Threshold

VCPC control_L

–

VCPC_H

VCPC control_H

–

100

–

tON_A

Current Control Pattern Time

(Note 5)

400

500

600

tON_B

220

300

380

tON_C

100

150

tOFF_D

100

150

tWDT

Watch Dog Time

–

180

210

240

PROTECTION FUNCTION SECTION

VFB(OVP)

Over Voltage Protection

–

7.1

7.5

7.9

VCC(OVP)

Over Voltage Protection at VCC Pin

–

VOUT(OVP)

Over Voltage Protection at OUT Pin

–

3.4

3.65

3.9

VFB(SCP)

Short Circuit Protection

VFB @ Hiccup

1.61

1.7

1.79

tSCP

Maximum Time under VFB(SCP)

–

116

128

140

TOTP

Shutdown Temperature

–

+128

+140

+152

°C

THYS

Temperature Hysteresis

–

+36

+40

+44

°C

Note 5: Guaranteed by design.

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