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PDF 3843CM Data sheet ( Hoja de datos )
| Número de pieza | 3843CM | |
| Descripción | CURRENT MODE PWM CONTROLLER | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 3843CM (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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CURRENT MODE PWM CONTROLLER
General Description
Features
Data Sheet
AP384XC
The AP3842C/3C/4C/5C are high performance fixed
frequency current-mode PWM controller series.
These integrated circuits are optimized for off-line and
DC-DC converter applications with minimum external
www.DataSheet4U.ccoommponents. They feature under-voltage lockout
(UVLO) circuit with low start-up current, trimmed
oscillator for precise duty cycle control, current sense
comparator providing maximum current limiting and a
totem pole output stage for increasing output current.
In addition, these ICs also feature accurate protection
against over-temperature, over-current and maximal
output power.
The AP3842C and AP3844C have UVLO thresholds
of 16V(on) and 10V(off); The corresponding thresh-
olds for AP3843C and AP3845C are 8.4 V(on) and
7.6V(off).
· Low Start-up Current: 50µA
· Robust VREF Line/Load Regulation
Low Line Regulation : 4mV
Low Load Regulation : 4mV
· High Stability of Reference Voltage over a Full
Temperature Range: 0.2mV/ oC
· Operating Frequency up to 500KHz
· High PWM Frequency Stability over a Full Tem-
perature Range: 2.5%
· High PWM Frequency Stability under a Full Sup-
ply Voltage Range: 0.2%
· Accurate Over-temperature Protection with Hys-
teresis
· UVLO with Hysteresis
Applications
The AP3842C and AP3843C can operate approaching · Off-line Converter
100% duty cycle; AP3844C and AP3845C can operate · DC-DC Converter
from zero to 50% duty cycle.
· Voltage Adapter
· CRT Monitor Power Supply
These ICs are available in SOIC-8 and DIP-8 pack- · Desktop Power Supply
ages.
· DVD/STB Power Supply
SOIC-8
DIP-8
Sep. 2006 Rev. 1. 1
Figure 1. Package Types of AP3842C/3C/4C/5C
BCD Semiconductor Manufacturing Limited
1
1 page  
CURRENT MODE PWM CONTROLLER
Absolute Maximum Ratings (Note 1, 2)
Parameter
Supply Voltage
Output Current
www.DataSheet4U.coAmnalog Inputs
Error Amp Output Sink Current
Power Dissipation at TA< 25 oC (DIP-8)
Power Dissipation at TA<25 oC (SOIC-8)
Junction Operating Temperature
Thermal Resistance (Junction to Ambient)
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
ESD (Machine Mode)
DIP-8
SOIC-8
Symbol
VCC
IO
V(ANA)
ISINK(E.A)
PD (Note 3)
PD (Note 3)
TJ
RθJA
TSTG
TLEAD
Value
30
±1
-0.3 to 6.3
10
1000
460
-40 to 150
140
160
-65 to 150
+300
250
Data Sheet
AP384XC
Unit
V
A
V
mA
mW
mW
oC
oC/W
oC/W
oC
oC
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indi-
cated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.
Note 2: All voltages are with respect to pin 5 and all currents are positive into specified terminal.
Note 3: Board thickness 1.6mm, board dimension 90mm x 90mm.
Recommended Operating Conditions
Parameter
Oscillation Frequency
Ambient Temperature
Symbol
f
TA
Min
-40
Max
500
85
Unit
KHz
oC
Sep. 2006 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
CURRENT MODE PWM CONTROLLER
Mechanical Dimensions
SOIC-8
www.DataSheet4U.com
4.800(0.189)
5.000(0.197)
7°
1.350(0.053)
1.750(0.069)
Data Sheet
AP384XC
Unit: mm(inch)
0.320(0.013)
8°
7°
1.270(0.050)
TYP
0.100(0.004)
0.300(0.012)
0.675(0.027)
0.725(0.029)
8°
D 5.800(0.228)
6.200(0.244)
D
20:1 φ 0.800(0.031)
0.200(0.008)
1.000(0.039)
3.800(0.150)
4.000(0.157)
0°
8°
0.330(0.013)
0.510(0.020)
0.900(0.035)
1°
5°
0.190(0.007)
0.250(0.010)
R0.150(0.006)
Sep. 2006 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet 3843CM.PDF ] | |
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