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UC1525B-SP Scheda tecnica(PDF) 4 Page - Texas Instruments

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Il numero della parte UC1525B-SP
Spiegazioni elettronici  RAD-TOLERANT CLASS-V REGULATING PULSE WIDTH MODULATOR
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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UC1525B-SP Scheda tecnica(HTML) 4 Page - Texas Instruments

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CONNECTION DIAGRAM
LCC-20, PLCC-20 (Top View)
FK Package
ELECTRICAL CHARACTERISTICS
UC1525B-SP
SLUS874 – JANUARY 2009............................................................................................................................................................................................... www.ti.com
VIN = 20 V, TA = TJ = –55°C to 125°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference Section
Output voltage
TJ = 25°C
5.062
5.10
5.138
V
Line regulation
VIN = 8 V to 35 V
5
10
mV
Load regulation
IL = 0 mA to 20 mA
7
15
mV
Temperature stability(1)
Over operating range
10
50
mV
Total output variation
Over line, load, and temperature
5.036
5.164
V
Short-circuit current
VREF = 0 V, TJ = 25°C
80
100
mA
Output noise voltage(1)
10 Hz
≤ f ≤ 10 kHz, TJ = 25°C
40
200
µVrms
Oscillator Section
Initial accuracy(2)
TJ = 25°C
±2
±6
%
Voltage stability(2)
VIN = 8 V to 35 V
±0.3
±1
%
Temperature stability(1)(2)
Over operating range
±3
±6
%
Minimum frequency
RT = 200 kΩ, CT = 0.1 µF
120
Hz
Maximum frequency
RT = 2 kΩ, CT = 470 pF
400
kHz
Current mirror
IRT = 2 mA
1.7
2.
2.2
mA
Clock amplitude(2)
3
3.5
V
Clock width(2)
TJ = 25°C
0.3
0.5
1
µs
Sync threshold
1.2
2
2.8
V
Sync input current
Sync = 3.5 V
1
2.5
mA
(1)
Parameters ensured by design and/or characterization, if not production tested.
(2)
Tested at fosc = 40 kHz (RT = 3.6 kΩ, CT = 0.01 µF, RD = 0 Ω).
Approximate oscillator frequency is defined by: f = 1/(CT (0.7 x RT + 3RD)).
4
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Copyright © 2009, Texas Instruments Incorporated
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