PJ494CS データシートの表示（PDF） - Unspecified
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PJ494CS Datasheet PDF : 11 Pages
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PJ494
Switchmode Pulse Width Modulation Control Circuit
DEAD-TIME CONTROL SECTIONDead-time control-section (See Figure 11)
Parameter
Test Conditions
Value
Unit
Min
Typ*
Max
Input bias current (pin 4)
VI=0 to 5.25V
--
-2.0
-10
µA
Maximum duty cycle, each output VI(pin 4)=0,CT=0.1µF,RT=12KΩ
--
45
50
%
Input threshold voltage(pin 4)
Zero duty cycle
Maximum duty cycle
--
0
3.0
--
3.3
--
V
PWM COMPARATOR SECTION (See Figure11)
Parameter
Test Conditions
Input threshold voltage (pin 3)
Input sink current (pin 3)
Zero duty cycle
V(pin 3)=0.7V
Value
Unit
Min
Typ*
Max
--
4.0
4.5
V
0.3
0.7
--
mA
TOTAL DEVICE
Parameter
Test Conditions
Value
Unit
Min
Typ*
Max
Standby supply current
Pin 6 at Vref, all other inputs and Vcc=15V
--
6.0
10
mA
outputs open
Vcc=40V
--
9.0
15
Average supply current
VI(PIN4)=2V, See Figure 1
--
7.5
--
SWITCHING CHARACTERISTICS, TA=25℃
Parameter
Test Conditions
Output voltage rise time
Output voltage fall time
Output voltage rise time
Output voltage fall time
Common-emitter configuration,
See Figure 3
Emitter-follower configuration,
See Figure 4
Value
Unit
Min
Typ*
Max
--
100
200
ns
--
25
100
--
100
200
--
40
100
UNDERVOLTAGE LOCKOUT SECTION
Parameter
Test Conditions
Turn-on Threshold
Vcc increasing Iref =1.0mA
Value
Unit
Min
Typ*
Max
5.5
6.43
7.0
V
z All typical value except for temperature coefficient are at TA=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 TA=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
∑ σ
=
N
n =1
(xn − x)2
N −1
2
z Temperature coefficient of timing capacitor and timing resistor not taken into account
3-11
2002/11.rev.A
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