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UC2876 Fiches technique(PDF) 4 Page - Texas Instruments

No de pièce UC2876
Description  Phase Shift Resonant Controller
Download  19 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2876 Fiches technique(HTML) 4 Page - Texas Instruments

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4
UC1875/6/7/8
UC2875/6/7/8
UC3875/6/7/8
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, –55°C < TA < 125°C for the UC1875/6/7/8, –25°C < TA <
85°C for the UC2875/6/7/8 and 0°C < TA < 70°C for the UC3875/6/7/8, VC = VIN = 12V, RFREQSET = 12kΩ,CFREQSET = 330pF,
RSLOPE = 12kΩ,CRAMP = 200pF, CDELAYSET A-B =CDELAYSET C-D = 0.01µF, IDELAYSET A-B =IDELAYSET C-D = –500µA, TA =TJ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Error Amplifier
Offset Voltage
515
mV
Input Bias Current
0.6
3
µA
AVOL
1V < VE/AOUT <4V
60
90
dB
CMRR
1.5V < VCM < 5.5V
75
95
dB
PSRR
11V < VIN < 20V
85
100
dB
Output Sink Current
VE/AOUT = 1V
1
2.5
mA
Output Source Current
VE/AOUT = 4V
–1.3
–0.5
mA
Output Voltage High
IE/AOUT = –0.5mA
4
4.7
5
V
Output Voltage Low
IE/AOUT = 1mA
0
0.5
1
V
Unity Gain BW
(Note 8)
7
11
MHz
Slew Rate
(Note 8)
6
11
V/
µsec
PWM Comparator
Ramp Offset Voltage
TJ = 25°C (Note 3)
1.3
V
Zero Phase Shift Voltage
(Note 4)
0.55
0.9
V
PWM Phase Shift (Note1) and (Note 7)
VE/AOUT > (Ramp Peak + Ramp Offset)
98
99.5
102
%
VE/AOUT < Zero Phase Shift Voltage
0
0.5
2
%
Output Skew (Note 1) and (Note 7)
VE/AOUT < 1V
5
±20
nsec
Ramp to Output Delay, (Note 8)
UC3875/6/7/8 (Note 6)
65
100
nsec
UC1875/6/7/8, UC2875/6/7/8 (Note 6)
65
125
nsec
Oscillator
Initial Accuracy
TJ = 25°C
0.85
1
1.15
MHz
Voltage Stability
11V < VIN < 20V
0.2
2
%
Total Variation
Line, Temperature
0.80
1.20
MHz
Sync Pin Threshold
TJ = 25°C
3.8
V
Clock Out Peak
TJ = 25°C
4.3
V
Clock Out Low
TJ = 25°C
3.3
V
Clock Out Pulse Width
RCLOCKSYNC = 3.9kΩ
30
100
nsec
Maximum Frequency, (Note 7)
RFREQSET =5kΩ
2
MHz
Ramp Generator/Slope Compensation
Ramp Current, Minimum
ISLOPE =10µA, VFREQSET = VREF
–11
–14
µA
Ramp Current, Maximum
ISLOPE = 1mA, VFREQSET = VREF
–0.8
–0.95
mA
Ramp Valley
0V
Ramp Peak - Clamping Level
RFREQSET = 100kΩ
3.8
4.1
V
Current Limit
Input Bias
VCS+=3V
2
5
µA
Threshold Voltage
2.4
2.5
2.6
V
Delay to Output, (Note 8)
UC3875/6/7/8
85
125
nsec
UC1875/6/7/8, UC2875/6/7/8
85
150
nsec


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