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UC2524DW Datasheet(PDF) 3 Page - Texas Instruments

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Part No. UC2524DW
Description  ADVANCED REGULATING PULSE WIDTH MODULATORS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

UC2524DW Datasheet(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
UC1524
UC2524
UC3524
SLUS180E – NOVEMBER 1999 – REVISED OCTOBER 2005
these specifications apply for T
A = –55°C to 125°C for the UC1524, –25°C to 85°C for the UC2524, and 0°C to 70°C for the
UC3524, V
IN = 20 V, and f = 20 kHz, TA = TJ, over operating free-air temperature range (unless otherwise noted)
UC1524/UC2524
UC3524
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
REFERENCE SECTION
Output voltage
4.8
5.0
5.2
4.6
5.0
5.4
V
Line regulation
VIN = 8 V to 40 V
10
20
10
30
mV
Load regulation
IL = 0 mA to 20 mA
20
50
20
50
mV
Ripple rejection
f = 120 Hz, TJ = 25°C
66
66
dB
Short circuit current limit
VREF = 0, TJ = 25°C
100
100
mA
Temperature stability
Over operating temperature range
0.3%
1%
0.3%
1%
Long term stability
TJ = 125°C, t = 1000 Hrs
20
20
mV
OSCILLATOR SECTION
Maximum frequency
CT = 1 nF, RT = 2 kΩ
300
300
kHz
Initial accuracy
RT and CT constant
5%
5%
Voltage stability
VIN = 8 V to 40 V, TJ = 25°C
1%
1%
Temperature stability
Over operating temperature range
5%
5%
Output amplitude
Pin 3, TJ = 25°C
3.5
3.5
V
Output pulse width
CT = 0.01 mfd, TJ = 25°C
0.5
0.5
µs
ERROR AMPLIFIER SECTION
Input offset voltage
VCM = 2.5 V
0.5
5
2
10
mV
Input bias current
VCM = 2.5 V
2
10
2
10
µA
Open loop voltage gain
72
80
60
80
dB
Common mode voltage
TJ = 25°C
1.8
3.4
1.8
3.4
V
Common mode rejection ratio
TJ = 25°C
70
70
dB
Small signal bandwidth
AV = 0 dB, TJ = 25°C
3
3
MHz
Output voltage
TJ = 25°C
0.5
3.8
0.5
3.8
V
COMPARATOR SECTION
Duty-cycle
% Each output on
0%
45%
0%
45%
Zero duty-cycle
1
1
Input threshold
V
Maximum duty-cycle
3.5
3.5
Input bias current
1
1
µA
CURRENT LIMITING SECTION
Sense voltage
Pin 9 = 2 V with error amplifier set for
190
200
210
180
200
220
mV
maximum out, TJ = 25°C
Sense voltage T.C.
0.2
0.2
mV/
°C
TJ = –55°C to 85°C for the –1 V to 1 V limit
–1
1
–1
1
Common mode voltage
V
TJ = 25°C
–0.3
1
OUTPUT SECTION (EACH OUTPUT)
Collector-emitter voltage
40
40
V
Collector leakage current
VCE = 40 V
0.1
50
0.1
50
µ A
Saturation voltage
IC = 50 mA
1
2
1
2
V
Emitter output voltage
VIN = 20 V
17
18
17
18
V
Rise Time
RC = 2 kΩ, TJ = 25°C
0.2
0.2
µs
Fall Time
RC = 2 kΩ, TJ = 25°C
0.1
0.1
µs
Total standby current (Note)
VIN = 40 V
8
10
8
10
mA
3


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