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UC2848 Scheda tecnica(PDF) 3 Page - Texas Instruments

Il numero della parte UC2848
Spiegazioni elettronici  Average Current Mode PWM Controller
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Produttore elettronici  TI [Texas Instruments]
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3
UC1848
UC2848
UC3848
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, all specifications are over the junction temperature range
of
−55°C to +125°C for the UC1848, −40°C to +85°C for the UC2848, and 0°C to +70°C for the UC3848. Test conditions are: VCC
= 12V, CT = 400pF, CI = 100pF, IOFF = 100
µA, CDC = 100nF, Cvs = 100pF, and Ivs = 400µA, TA =TJ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Real Time Current Waveform Synthesizer
Ion Amplifier
Offset Voltage
0.95
1
1.05
V
Slew Rate (Note 1)
20
25
V/
µs
lib
-2
-20
µA
IOFF Current Mirror
Input Voltage
0.95
1
1.05
V
Current Gain
0.9
1
1.1
A/A
Current Error Amplifier
AVOL
60
100
dB
Vio
12V
≤ VCC
20V, 0V
VCM
5V
10
mV
lib
-0.5
-3
µA
Voh
IO =
−200µA
3
3.3
V
Vol
IO = 200
µA
0.3
0.6
V
Source Current
VO = 1V
1.4
1.6
2.0
mA
GBW Product
f = 200kHz
5
8
MHz
Slew Rate (Note 1)
810
V/
µs
Oscillator
Frequency
TA = 25°C
240
250
260
kHz
235
265
kHz
Ramp Amplitude
1.5
1.65
1.8
V
Duty Cycle Clamp
Max Duty Cycle
V(DMAX) = 0.75
• VREF
73.5
76.5
79.5
%
Volt Second Clamp
Max On Time
900
1100
ns
VCC Comparator
Turn-on Threshold
13
14
V
Turn-off Threshold
910
V
Hysteresis
2.5
3
3.5
V


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