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參數(shù)資料
| 型號(hào)： | PJ494 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Switchmode Pulse Width Modulation Control Circuit |
| 中文描述： | 開關(guān)模式脈寬調(diào)制控制電路 |
| 文件頁(yè)數(shù)： | 3/11頁(yè) |
| 文件大?。?/td> | 688K |
| 代理商： | PJ494 |
PJ494
Switchmode Pulse Width Modulation Control Circuit
3-11
2002/11.rev.A
DEAD-TIME CONTROL SECTIONDead-time control-section (See Figure 11)
Parameter
Value
Typ*
-2.0
45
3.0
--
Test Conditions
Min
--
--
--
0
Max
-10
50
3.3
--
Unit
Input bias current (pin 4)
Maximum duty cycle, each output
Input threshold voltage(pin 4)
V
I
=0 to 5.25V
V
I
(pin 4)=0,C
T
=0.1
μ
F,R
T
=12K
Zero duty cycle
Maximum duty cycle
μ
A
%
V
PWM COMPARATOR SECTION (See Figure11)
Parameter
Value
Typ*
4.0
0.7
Test Conditions
Min
--
0.3
Max
4.5
--
Unit
Input threshold voltage (pin 3)
Input sink current (pin 3)
TOTAL DEVICE
Parameter
Zero duty cycle
V(pin 3)=0.7V
V
mA
Value
Typ*
6.0
9.0
7.5
Test Conditions
Min
--
--
--
Max
10
15
--
Unit
Vcc=15V
Vcc=40V
Standby supply current
Pin 6 at Vref, all other inputs and
outputs open
V
I(PIN4)
=2V, See Figure 1
Average supply current
SWITCHING CHARACTERISTICS, T
A
=25
Parameter
mA
℃
Value
Typ*
100
25
100
40
Test Conditions
Min
--
--
--
--
Max
200
100
200
100
Unit
Output voltage rise time
Output voltage fall time
Output voltage rise time
Output voltage fall time
UNDERVOLTAGE LOCKOUT SECTION
Parameter
Common-emitter configuration,
See Figure 3
Emitter-follower configuration,
See Figure 4
ns
Value
Typ*
6.43
Test Conditions
Min
5.5
Max
7.0
Unit
Turn-on Threshold
z
All typical value except for temperature coefficient are at T
A
=25
℃
z
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
z
All typical values except for parameter changes with temperature are at T
A
=25
℃
z
Duration of the short-circuit should not exceed one second
z
Standard deviation is a measure of the statistical distribution about the mean as derived from the formula
1
2
)
(
z
Temperature coefficient of timing capacitor and timing resistor not taken into account
Vcc increasing Iref =1.0mA
V
2
1
1
=
∑
=
n
n
N
x
x
σ
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