參數(shù)資料
型號: AX3842S
廠商: Electronic Theatre Controls, Inc.
英文描述: High Performance Current Mode Pwm Controlers
中文描述: 高性能電流模式PWM Controlers
文件頁數(shù): 7/12頁
文件大?。?/td> 265K
代理商: AX3842S
Page No. : 7/12
AVANTICS - AX3842 Series
Specification No.: 050308-FE0008
Application Information
Open Loop Test Circuit
Oscillator and Output Waveforms
Error Amp Configuration
Under Voltage Lockout
4.7K
1K
4.7K
5K
100K
RT
0.1uF
0.1uF
CT
1W
1K
Error Amp.
Adjust
I
Adjust
HPN2222A
COMP
RT/CT
V
Vcc
Output
Ground
Ground
Output
Vcc
Vref
1
2
3
4
5
6
7
8
REF
SENSE
I
SENSE
V
FB
A
AX3842
RT
CT
4
5
6
7
8
5V REG
PWM
Clock
Oscillator
Id
Output
GND
CT
Output
Large RT / Small CT
CT
Output
Small RT / Large CT
Vcc
1
2
3
High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and
bypass capacitors should be connected close to pin5 in a single point ground. The transistor and 5K
potentiometerare used to samplethe oscillator waveform and apply an adjustable ramp to pin3.
Zi
Zf
V
COMP
2.5V
1mA
1
2
FB
+
-
ON/OFF Command
To Rest Of IC
Von
Voff
AX3842
16V
10V
Icc
<17mA
<0.5mA
Vcc
Voff
Von
Vi
7
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