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AP3988 Datasheet(PDF) 5 Page - Diodes Incorporated

Part # AP3988
Description  PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
PDF  12 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP3988 Datasheet(HTML) 5 Page - Diodes Incorporated

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AP3988
Document number: DS36722 Rev. 4 - 2
5 of 12
www.diodes.com
June 2014
© Diodes Incorporated
AP3988
A Product Line of
Diodes Incorporated
Electrical Characteristics (@VCC=15V, TJ=+25°C, unless otherwise specified.)
Symbol
Parameters
Conditions
Min
Typ
Max
Unit
STARTUP AND UVLO SECTION
VTH_ST
Turn-on Voltage
–
13
15
17
V
VOPR(MIN)
Turn-off Voltage
–
5.2
5.8
6.4
V
STANDBY CURRENT SECTION
IST
Turn-on Current
VCC=VTH_ST-1V before
startup
0
0.2
0.6
μA
ICC_OPR
Operating Current
Static current @ no load
550
650
750
OPERATING FREQUENCY SECTION (5% LOAD TO FULL LOAD)
fS(MAX)
Operating Frequency in Full Load
Condition
–
–
–
60
kHz
Δf/f
Frequency Dithering
5% to 100% of full load
range
4.5
5
5.5
%
OPERATING FREQUENCY SECTION (NO LOAD TO 5% OF IOUT(MAX))
fS(MIN)
Output Voltage Detection Frequency
–
1.8
2
2.2
kHz
CURRENT SENSE SECTION
VCS_H
Peak Current Sense Voltage in Heavy
Load
40% to 100% of full load
874
910
946
mV
VCS_M
Peak Current Sense Voltage in Middle
Load
17% to 40% of full load
581
605
630
mV
VCS_L
Peak Current Sense Voltage in Light
Load
5% to 17% of full load
390
405
425
mV
ΔVCS/VCS
VCS Modulation for Frequency Dithering
–
–
2.5
–
%
tMOD
VCS Modulation Period
–
225
250
275
μs
RLINE
Built-in Line Compensation Resistor
–
260
330
400
Ω
tLEB
Leading Edge Blanking
@ VCS_H and VCS_M
600
750
900
ns
CONSTANT VOLTAGE SECTION
VFB
Equivalent Feedback Voltage @ 90%
Load
Closed loop test of VOUT
4.13
4.20
4.27
V
IFB
FB Pin Input Current
VFB=4V
3.36
4.20
5.04
μA
VCABLE
Cable Compensation Drop
–
–
0.35
–
V
CONSTANT CURRENT SECTION
tONS/tSW
Secondary Winding Conduction Duty
VFB=3V
–
4/7
–
–
POWER TRANSISTOR SECTION
VCE(SAT)
Collector-emitter Saturation Voltage
IC=0.5A
–
–
0.3
V
hFE
DC Current Gain
–
14
17
–
–
ICEO
Leakage Current
–
–
–
60
μA
PROTECTION FUNCTION SECTION
VFB(OVP)
Over Voltage Protection
–
–
7.5
–
V
VFB(SCP)
Short Circuit Protection
VFB @ Hiccup
2.6
3.3
3.7
V
TOTP
Shutdown Temperature
–
+125
+160
–
°C
THYS
Temperature Hysteresis
–
–
+40
–
°C



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