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參數(shù)資料
| 型號(hào)： | UC284XA |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER |
| 中文描述： | 高性能電流模式PWM控制器 |
| 文件頁(yè)數(shù)： | 2/16頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | UC284XA |
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UC384XA - UC284XA
2/16
Table 2. Absolute Maximum Ratings
* All voltages are with respect to pin 5, all currents are positive into the specified terminal.
Figure 3. DIP-8/SO-8 Pin Connection
(Top view)
Table 3. Pin Description
Symbol
V
i
V
i
I
O
E
O
Parameter
Value
30
Unit
V
Supply Voltage (low impedance source)
Supply Voltage (Ii < 30mA)
Self Limiting
±
1
5
Output Current
Output Energy (capacitive load)
A
μ
J
V
mA
W
Analog Inputs (pins 2, 3)
Error Amplifier Output Sink Current
Power Dissipation at T
amb
≤
25 °C (DIP-8)
Power Dissipation at T
amb
≤
25
°
C (SO-8)
Storage Temperature Range
Junction Operating Temperature
– 0.3 to 5.5
10
1.25
P
tot
P
tot
T
stg
T
J
T
L
800
mW
°
C
°C
°
C
– 65 to 150
– 40 to 150
Lead Temperature (soldering 10s)
300
N°
Pin
Function
1
COMP
This pin is the Error Amplifier output and is made available for loop compensation.
2
V
FB
This is the inverting input of the Error Amplifier. It is normally connected to the switching power
supply output through a resistor divider.
3
I
SENSE
A voltage proportional to inductor current is connected to this input. The PWM uses this
information to terminate the output switch conduction.
4
R
T
/C
T
The oscillator frequency and maximum Output duty cycle are programmed by connecting
resistor R
T
to V
ref
and cpacitor C
T
to ground. Operation to 500kHz is possible.
5
GROUND
This pin is the combined control circuitry and power ground.
6
OUTPUT
This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced
and sunk by this pin.
7
V
CC
This pin is the positive supply of the control IC.
8
V
ref
This is the reference output. It provides charging current for capacitor C
T
through resistor R
T
.
COMP
V
FB
I
SENSE
R
T
/C
T
GROUND
OUTPUT
Vi
V
REF
1
3
2
4
6
5
7
8
D95IN332
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| UC284XAD | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
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| UC284XAM | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XAY | 制造商:MICROSEMI 制造商全稱(chēng):Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XBD | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
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