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AP384XC Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited

Part No. AP384XC
Description  CURRENT MODE PWM CONTROLLER
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Manufacturer  BCDSEMI [BCD Semiconductor Manufacturing Limited]
Direct Link  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AP384XC Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited

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CURRENT MODE PWM CONTROLLER
AP384XC
Data Sheet
1
Sep. 2006 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
General Description
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
components. 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).
The AP3842C and AP3843C can operate approaching
100% duty cycle; AP3844C and AP3845C can operate
from zero to 50% duty cycle.
These ICs are available in SOIC-8 and DIP-8 pack-
ages.
Features
·
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
·
Off-line Converter
·
DC-DC Converter
·
Voltage Adapter
·
CRT Monitor Power Supply
·
Desktop Power Supply
·
DVD/STB Power Supply
SOIC-8
DIP-8
Figure 1. Package Types of AP3842C/3C/4C/5C


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