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LM3524 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM3524
Descripción Electrónicos  Regulating Pulse Width Modulator
Download  22 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3524 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
(Note 1)
LM2524D
LM3524D
Symbol
Parameter
Conditions
Tested
Design
Tested
Design
Units
Typ
Limit
Limit
Typ
Limit
Limit
(Note 3)
(Note 4)
(Note 3)
(Note 4)
TC-V
sense
Sense Voltage T.C.
0.2
0.2
mV/˚C
Common Mode
−0.7
−0.7
V
Min
Voltage Range
V
5 −V4 = 300 mV
1
1
V
Max
SHUT DOWN SECTION
V
SD
High Input
V
(Pin 2) −V(Pin 1)
1
0.5
1
0.5
V
Min
Voltage
150 mV
1.5
1.5
V
Max
I
SD
High Input
I
(pin 10)
11
mA
Current
OUTPUT SECTION (EACH OUTPUT)
V
CES
Collector Emitter
I
C
≤ 100 µA
55
40
V
Min
Voltage Breakdown
I
CES
Collector Leakage
V
CE = 60V
Current
V
CE = 55V
0.1
50
µA
Max
V
CE = 40V
0.1
50
V
CESAT
Saturation
I
E = 20 mA
0.2
0.5
0.2
0.7
V
Max
Voltage
I
E = 200 mA
1.5
2.2
1.5
2.5
V
EO
Emitter Output
I
E =50mA
18
17
18
17
V
Min
Voltage
t
R
Rise Time
V
IN = 20V,
I
E = −250 µA
200
200
ns
R
C =2k
t
F
Fall Time
R
C = 2k
100
100
ns
SUPPLY CHARACTERISTICS SECTION
V
IN
Input Voltage
After Turn-on
8
8
V
Min
Range
40
40
V
Max
T
Thermal Shutdown
(Note 2)
160
160
˚C
Temp.
I
IN
Stand By Current
V
IN = 40V (Note 6)
5
10
5
10
mA
Note 1: Unless otherwise stated, these specifications apply for TA =TJ = 25˚C. Boldface numbers apply over the rated temperature range: LM2524D is −40˚ to 85˚C
and LM3524D is 0˚C to 70˚C. VIN = 20V and fOSC = 20 kHz.
Note 2: For operation at elevated temperatures, devices in the N package must be derated based on a thermal resistance of 86˚C/W, junction to ambient. Devices
in the M package must be derated at 125˚C/W, junction to ambient.
Note 3: Tested limits are guaranteed and 100% tested in production.
Note 4: Design limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage range. These limits are not used to
calculate outgoing quality level.
Note 5: Absolute maximum ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its rated operating conditions.
Note 6: Pins 1, 4, 7, 8, 11, and 14 are grounded; Pin2=2V. All other inputs and outputs open.
Note 7: The value of a Ct capacitor can vary with frequency. Careful selection of this capacitor must be made for high frequency operation. Polystyrene was used
in this test. NPO ceramic or polypropylene can also be used.
Note 8: OSC amplitude is measured open circuit. Available current is limited to 1 mA so care must be exercised to limit capacitive loading of fast pulses.
www.national.com
5


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