參數(shù)資料
型號: AV3843A
廠商: Avic Technology
英文描述: LINEAR INTEGRATED CIRCUIT
中文描述: 線性集成電路
文件頁數(shù): 1/6頁
文件大?。?/td> 65K
代理商: AV3843A
@vic
AV
3842A / 3843A
LINEAR INTEGRATED CIRCUIT
QW-R103-002,B
CURRENT MODE PWM CONTROL
CIRCUITS
DESCRIPTION
The
@vic
AV
3842A/3843A provide the necessary functions
to implement off-line or DC to DC fixed frequency current
mode , controlled switching circuits with a minimal external
part count
FEATURES
*Low external part count.
*Low start up current ( Typical 0.12mA )
*Automatic feed forward compensation
*Pulse-by-Pulse current limiting
*Under-voltage lockout with hysteresis
*Double pulse Suppression
*High current totem pole output to drive MOSFET directly
*Internally trimmed band gap reference
*500kHz operation
BLOCK DIAGRAM
DIP-8
SOP-8
ABSOLUTE MAXIMUM RATINGS
(Ta=25
°
C)
PARAMETER
Supply Voltage(Low Impedance Source)
Supply Voltage(Icc<30mA)
Output Current ( Peak )
Output Energy(capacity Load)
Analog Inputs(pin 2,3)
Error Amplifier Output Sink Current
Power Dissipation
PD DIP-8
SOP-8
Lead Temperature( Soldering 10 Sec )
7
5
7
6
5
4
3
1
2
8
Internal
Bias
5V REF
S/R
U.V.L.O
R
S
PWM
LATCH
Vref
Good
Logic
ERROR
AMPLIFIER
1/2Vref
1/3Vref
1V
OSCILLATOR
Vref
VFB
COMP
CURRENT SENSE
RT/CT
Vcc
GND
OUTPUT
Vcc
GND
CURRENT
SENSE
COMPARATOR
SYMBOL
V
CC
Vcc
Io
V
I(ANA)
I
SINK(EA)
VALUE
30
Self Limiting
+-1
5
-0.3 ~ +6.3
10
UNIT
V
V
A
μ
J
V
mA
W
W
°
C
at T
amb
<=25
°
C 1.0
at T
amb
<=25
°
C 0.5
300
Tlead
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