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參數(shù)資料
| 型號： | MIC3832 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Current-Fed PWM Controllers |
| 中文描述： | 電流型PWM控制器 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大小： | 100K |
| 代理商： | MIC3832 |
MIC3832/3833
Micrel
4-136
April 1998
Pin Description
Pin Number
Pin Name
Pin Function
1
GND
Ground: Use as single-point ground tie point.
2
PWM
PWM Output: Variable duty-cycle totem pole output.
3
Q
Switch (Output): Totem pole output. Noninverting 50% duty cycle output
(180
°
out-of-phase with Q with no dead time).
4
V
DD
5V REF
Supply Voltage (Input): Clamped to 22V by internal zener diode.
5
5V Bandgap Reference (Output)
6
EA –
Inverting Error Amplifier Input
7
EA +
Noninverting Error Amplifier Input
8
EA OUT
Error Amplifier Output: Connect to the appropriate feedback network to
adjust the open loop gain or frequency response.
9
NC
No Connection: Do not use—leave open.
10
SHDN
Overcurrent Shutdown (Input): >1 V disables outputs, >1.25V initiates soft-
start restart. For cycle-by-cycle current limiting, even in voltage-mode control
applications, connect to current sensor. If current sense is not used, connect
to GND.
11
MDC/SS
Maximum Duty Cycle/Soft Start (Input): Apply a dc voltage to adjust maxi-
mum duty cycle (see chart). Adjust soft start by adding capacitance to
increase turn-on time during initial start up or restart after overcurrent
shutdown.
12
CMR
Current Mode Ramp: Feed point for a sample of inductor current when using
current mode control. For voltage-mode control, connect directly to the C
T
pin.
13
SYNC
Synchronization (Input): AC coupled input from an external master clock
(reference) signal. If not used, leave unconnected. A high (>1.5V) resets the
C
T
ramp.
Oscillator Timing Resistor: Connect 4k
minimum resistor to GND.
14
R
T
C
T
15
Oscillator Timing Capacitor: Connect capacitor to GND. See “Typical
Characteristics: Discharge Time” graph for capacitor value.
Maximum oscillator frequency
1
2
discharge time
=
×
)
16
Q
Switch (Output): Totem pole output. Inverting 50% duty cycle output (180
°
out-of-phase with Q with no deadtime).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC3832BN | Current-Fed PWM Controllers |
| MIC3832BWM | Current-Fed PWM Controllers |
| MIC3833BN | Current-Fed PWM Controllers |
| MIC3833BWM | Current-Fed PWM Controllers |
| MIC3839 | Flexible Push-Pull PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC3832BN | 制造商:Micrel Inc 功能描述: |
| MIC3832BWM | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Current-Fed PWM Controllers |
| MIC3833BN | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Current-Fed PWM Controllers |
| MIC3833BWM | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Current-Fed PWM Controllers |
| MIC3838 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Flexible Push-Pull PWM Controller |
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