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参数资料
| 型号： | AIC3842 |
| 厂商： | Analog Integrations Corporation |
| 英文描述： | Current-Mode PWM Controller |
| 中文描述： | 电流模式PWM控制器 |
| 文件页数： | 5/7页 |
| 文件大小： | 114K |
| 代理商： | AIC3842 |
AIC3842
5
n
BLOCK DIAGRAM
8
6
R
S
VCC
GND
V
REF
5V/50mA
COMP
OUTPUT
VFB
ISENSE
RT/CT
VREF
Good
Logic
UVLO
PWM
Latch
OSC
ZD
34V
Current
Sense
comparator
Internal Bias
Error Amp.
D1
Z1
1V
D2
R2
2.50V
S/R
5V
REF
Q2
Q1
7
5
4
1
2
3
n
PIN DESCRIPTIONS
PIN 1: COMP
- This pin is the error amplifier
output and is made available for
loop compensation.
PIN 2:
VFB
- This is the inverting input of the
error amplifier. It is normally
connected
to
power supply output through a
resistor divider.
the
switching
PIN 3:
ISENSE - A
voltage
proportional
to
inductor current is connected to
this input. The PWM uses this
information
to
output switch conduction.
terminate
the
PIN 4:
RT/CT
- The oscillator frequency and
maximum output duty cycle are
programmed
resistor R
T
to V
REF
and capacitor
C
T
to ground. Operation to
500KHz is feasible.
by
connecting
PIN 5:
GND-
This pin is the combined control
circuitry and power ground.
PIN 6:
OUTPUT- This output directly drives the
gate of a power MOSFET. Peak
currents up to 1A are sourced
and sunk by this pin.
PIN 7:
VCC -
This pin is the positive supply of
the control IC.
PIN 8:
VREF-
This is the reference output. It
provides charging current for
capacitor CT through resistor RT.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AIC3842CN | 制造商:AIC 制造商全称:Analog Intergrations Corporation 功能描述:Current-Mode PWM Controller |
| AIC3842CS | 制造商:AIC 制造商全称:Analog Intergrations Corporation 功能描述:Current-Mode PWM Controller |
| AIC3843 | 制造商:AIC 制造商全称:Analog Intergrations Corporation 功能描述:Current-Mode PWM Controller |
| AIC3843CNTB | 制造商:AIC 制造商全称:Analog Intergrations Corporation 功能描述:Current-Mode PWM Controller |
| AIC3843CNTR | 制造商:AIC 制造商全称:Analog Intergrations Corporation 功能描述:Current-Mode PWM Controller |
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