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| 型號(hào)： | UC2832-EP |
| 英文描述： | Military Enhanced Plastic Precision Low Dropout Linear Controllers |
| 中文描述： | 軍事增強(qiáng)塑料精密低壓差線性控制器 |
| 文件頁(yè)數(shù)： | 6/11頁(yè) |
| 文件大?。?/td> | 377K |
| 代理商： | UC2832-EP |
UC2832-EP
PRECISION LOW DROPOUT LINEAR CONTROLLER
SGLS147A
–
JANUARY 2003
–
REVISED MARCH 2003
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION AND OPERATION INFORMATION
Estimating Maximum Load Capacitance
For any power supply, the rate at which the total output capacitance can be charged depends on the maximum
output current available and on the nature of the load. For a constant-current current-limited power supply, the
output will come up if the load asks for less than the maximum available short-circuit limit current.
To ensure recovery of a duty-ratio current-limited power supply from a short-circuited load condition, there is
a maximum total output capacitance which can be charged for a given unit ON time. The design value of ON
time can be adjusted by changing the timing capacitor. Nominally, T
ON
= 0.693 x 10 k
x C
T
.
Typically, the IC regulates output current to a maximum of I
MAX
= K x I
TH
, where I
TH
is the timer trip-point current,
and
K
Current Sense Amplifier Offset Voltage
100 mA
and is variable from 1.35 to 3.05 with V
ADJ
.
For a worst-case constant-current load of value just less than I
TH
, C
MAX
can be estimated from:
CMAX
K
1
TH
TON
VOUT
where V
OUT
is the nominal regulator output voltage.
For a resistive load of value R
L
, the value of C
MAX
can be estimated from:
TON
RL
In
1
K
ITH
CMAX
1
VOUT
RL
–
1
320
300
280
260
240
220
200
180
160
140
120
O
–
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.5
2.25
VADJ (Pin 11)
–
V
Figure 2. Current Sense Amplifier Offset Voltage vs V
ADJ
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| UC2832Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Adjustable Voltage Regulator |
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