Diodes AP3988/89/90 - Manual (Page 5)

AP3988/89/90
Document number: DS36722 Rev. 3 - 2
5 of 13
www.diodes.com
March 2014
© Diodes Incorporated
AP3988/89/90
A Product Line of
Diodes Incorporated
N
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P
R
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D
U
C
T
Electrical Characteristics
(@V
CC
=15V, T
J
=+25°C, unless otherwise specified.)
Symbol Parameters Conditions Min Typ Max Unit
STARTUP AND UVLO SECTION
V
TH_ST
Turn-on Voltage – 13 15 17 V
V
OPR(MIN)
Turn-off Voltage – 5.2 5.8 6.4 V
STANDBY CURRENT SECTION
I
ST
Turn-on Current
V
CC
=V
TH_ST
-1V before
startup
0 0.2 0.6
μA
I
CC_OPR
Operating Current Static current @ no load 550 650 750
OPERATING FREQUENCY SECTION (5% LOAD TO FULL LOAD)
f
S(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 I
OUT(MAX)
)
f S(MIN)
Output Voltage Detection Frequency – 1.8 2 2.2 kHz
CURRENT SENSE SECTION
V CS_H
Peak Current Sense Voltage in Heavy
Load
40% to 100% of full load 874 910 946 mV
V
CS_M
Peak Current Sense Voltage in Middle
Load
18% to 40% of full load 581 605 630 mV
V
CS_L
Peak Current Sense Voltage in Light
Load
5% to 18% of full load 390 405 425 mV
V
CS_EL
Peak Current Sense Voltage in Extra-
Light Load
0% to 5% of full load 216 225 234 mV
ΔV
CS
/V
CS
V
CS
Modulation for Frequency Dithering
– – 2.5 – %
t
MOD
V
CS
Modulation Period – 14.4 16 17.6 ms
R
LINE
Built-in Line Compensation Resistor – 260 330 400 Ω 
t
LEB
Leading Edge Blanking
@ V CS_H and V CS_M
410 500 575 ns
@ V
CS_EL
155 200 245 ns
CONSTANT VOLTAGE SECTION
V
FB
Equivalent Feedback Voltage @ Light
Load
Closed loop test of V
OUT
3.94 4.00 4.06 V
I
FB
FB Pin Input Current V
FB
=4V 3.36 4.20 5.04 μA
V CABLE /V OUT
Cable Compensation Ratio (V FB@FULLLOAD
- V FB ) / V FB
5.65 6.00 6.40 %
CONSTANT CURRENT SECTION
t
ONS
/t
SW
Secondary Winding Conduction Duty V
FB
=2V – 4/7 – –
POWER TRANSISTOR SECTION
V
CE(SAT)
Collector-emitter Saturation Voltage
AP3988/89: I
C
=0.5A
AP3990: I
C
=1A
– – 0.3 V
h
FE
DC Current Gain
AP3988/89 14 17 – –
AP3990 17 26 – –
I
CEO
Leakage Current – – – 60 μA
PROTECTION FUNCTION SECTION
V FB(OVP)
Over Voltage Protection – – 7.5 – V
V
FB(SCP)
Short Circuit Protection V
FB
@ Hiccup 1.4 1.5 1.6 V
T
OTP
Shutdown Temperature – +125 +160 – °C
T
HYS
Temperature Hysteresis – – +40 – °C
– Driver Protection Voltage – 4 5 6 V