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PDF AP3842G Data sheet ( Hoja de datos )
| Número de pieza | AP3842G | |
| Descripción | (AP3842G - AP3845G) Green Mode PWM Controller | |
| Fabricantes | Shanghai SIM-BCD Semiconductor | |
| Logotipo |  |
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Data Sheet
GREEN MODE PWM CONTROLLER
General Description
Features
AP384XG
The AP384XG is a Green Mode PWM controller. It is
specially designed for off-line AC-DC adapter and bat-
tery charger applications where both needs for low
standby power and high efficiency in normal operation
are required. In a well designed product, the AP384XG
is capable to allow the system consuming only 0.5W
power in standby mode.
In normal operation, the AP384XG features adjustable
frequency by using an external resistor and capacitor
combination. When output power falls below a given
level, the IC automatically switches to the skip mode,
which works by skipping switching cycles. The
AP384XG also features low start-up and low standby
operating current for its special topology.
· Green Mode PWM Controller to Support the
"Blue Angel" Norm
· Adjustable Skip Cycle Mode Operation
· Low Start-up Current: 50µA (Typ.)
· Low Standby Operating Current: 6mA
· Internal Leading Edge Blanking
· Adjustable Oscillator Frequency up to 500KHz
· Totem Pole Output
· Under Voltage Lock Out (UVLO)
· Over-Temperature Protection
· Pin to Pin Replacement for AZ384XA
Applications
The AP384XG provides accurate protection against
over-temperature, over-current and maximal output · Off-line Converter
power.
· DC-DC Converter
· DVD/STB Power Supply
The AP384XG is available in SOIC-8 and DIP-8 · Power Adapter
packages.
· CRT Monitor Power Supply
Aug. 2005 Rev. 1. 2
SOIC-8
DIP-8
Figure 1. Package Types of AP384XG
BCD Semiconductor Manufacturing Limited
1
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Data Sheet
GREEN MODE PWM CONTROLLER
AP384XG
Electrical Characteristics
(VCC=15V, RT=10kΩ CT=3.3nF, TA= -40 to 85oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ Max
Unit
REFERENCE SECTION
Reference Output Voltage
Total Output Variation
VREF
Line Regulation
Load Regulation
Short Circuit Output Current
Temperature Stability
∆VREF
∆VREF
ISC
UNDER VOLTAGE LOCK OUT SECTION
TJ=25oC, IREF=1mA
Line, Load, Temp.
12V ≤ VCC ≤25V
1mA ≤ IREF ≤20mA
TA=25oC
4.95 5.00 5.05
V
4.9 5.10 V
4 15 mV
4 15 mV
-100 -180 mA
0.2 0.4 mV/oC
Start-up Threshold
AP3842G/AP3844G
15 16 17
V
AP3843G/AP3845G
7.8 8.4 9.0
Minimum Operating Voltage
AP3842G/AP3844G
8.5 10 11.5
V
AP3843G/AP3845G
7.0 7.6 8.2
TOTAL STANDBY CURRENT SECTION
Start-up Current
Operating Current
Standby Operating Current
Zener Voltage
PWM SECTION
VCC=14V
VFB=0, VCS=0, CL=1nF
VFB=2.7V, VCS=0.5V
ICC=25mA
50 80
8
6
30 34
µA
mA
mA
V
Maximum Duty Cycle
AP3842G/AP3843G
94 96
%
AP3844G/AP3845G
46 48 50
Minimum Duty Cycle
0%
OSCILLATOR SECTION
Oscillation Frequency
Oscillator Amplitude
Temperature Stability
Voltage Stability
Discharge Current
f
VOSC
TJ=25oC
Pin RT/CT, peak to peak
12V ≤ VCC ≤ 25V
VRT/CT = 2V (Note 4)
47 52 57 KHz
1.7 V
2%
0.2 1
%
8.5 9.5 10.5 mA
Note 4: This parameter is measured with RT=10kΩ to VREF, it contributes 0.3mA of current to the measured value.
So the total current flowing into the CT pin will be 0.3mA higher than the measured value approximately.
Aug. 2005 Rev. 1. 2
DataSheet4 U .com
BCD Semiconductor Manufacturing Limited
5
5 Page 
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GREEN MODE PWM CONTROLLER
Mechanical Dimensions
SOIC-8
Data Sheet
AP384XG
Unit: mm(inch)
4.800(0.189)
5.000(0.197)
7°
1.350(0.053)
1.750(0.069)
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)
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
11
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AP3842G.PDF ] | |
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