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AP3842 Datasheet(PDF) 2 Page - Anachip Corp

Part No. AP3842
Description  High Performance Current Mode PWM Controller
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Maker  ANACHIP [Anachip Corp]
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AP3842 Datasheet(HTML) 2 Page - Anachip Corp

   
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High Performance Current Mode PWM Controller
AP3842/3/4/5
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Oct.11, 2004
2/8
Block Diagram ( toggle flip flop used only in AP3844 and AP3845 )
S/R
5V
REF
T
S
R
R
2R
1V
CURRENT
SENSE
COMPARATOR
PWM
LATCH
8
6
OUTPUT
VREF
5V 50mA
INTERNAL
BIAS
VREF GOOD
LOGIC
2.50V
OSC.
ERROR AMP.
2
1
3
4
5
7
Vi
GROUND
RT/CT
VFB
COMP
CURRENT
SENSE
16V
AP384X
UVLO
36V
Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
Vi
Supply Voltage (low impedance source)
36
V
Vi
Supply Voltage (li < 30mA)
Self Limiting
Io
Output Current
±0.7
A
Eo
Output Energy (capacitive load)
5
µJ
Analog Inputs (pins2,3)
-0.3 to 5.5
V
Error Amplifier Output Sink Current
10
mA
Ptot
Power Dissipation at Tamb ≦50
0C (PDIP8)
1.25
W
Ptot
Power Dissipation at Tamb ≦25
0C (SOP8)
800
mW
Tstg
Storage Temperature Range
-65 to 150
oC
TL
Lead Temperature (soldering 10s)
260
oC
*Notes: 1. All voltages are with respect to pin 5, all currents are positive into the specified terminal.
Electrical Characteristics
(Unless otherwise stated, these specifications apply for 0≦Tamb≦70
oC for AP384X ; Vi = 15V(note 5); RT = 10KΩ;CT = 3.3nF)
AP384X
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
REFERENCE SECTION
VREF
Output Voltage
Tj = 25
0C I0=1mA
4.90 5.00 5.10
V
∆VREF
Line Regulation
12V≦Vi≦25V
2
20
mV
∆VREF
Load Regulation
1mA≦Io≦20mA
3
25
mV
∆VREF/∆T
Temperature Stability
(Notes 2)
0.2
0.4 mV/
0C
Total Output Variation
Line, Load, Temperature (Notes 2) 4.82
5.18
V
eN
Output Noise Voltage
10Hz≦f≦10KHz Tj=25
0C (Notes
2)
50
µV
Long Term Stability
Tamb=125
0C, 1000Hrs (Notes 2)
5
25
mV
ISC
Output Short Circuit current
-85
-120
mA


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