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UC1875-SP датащи(PDF) 5 Page - Texas Instruments

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номер детали UC1875-SP
подробное описание детали  RAD-TOLERANT CLASS-V, PHASE SHIFT RESONANT CONTROLLER
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1875-SP датащи(HTML) 5 Page - Texas Instruments

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-12
(DELAY)
62.5 x 10
I
(DELAY)
Delay set voltage
R
(9)
Delay time can be programmed via resistors from the delay set pins to ground. Delay time =
.
Where I(DELAY) =
. The Recommended range for I(DELAY) is 25 µA ≤ I(DELAY) ≤ 1 mA.
UC1875-SP
www.ti.com
SLUSAQ9
– DECEMBER 2011
ELECTRICAL CHARACTERISTICS (continued)
–55°C < TA < 125°C. VC = VIN = 12 V, R(FREQSET) = 12 kΩ, C(FREQSET) = 330 pF, R(SLOPE) = 12 kΩ, C(RAMP) = 200 pF,
C(DELAYSET A-B) = C(DELAYSET C-D) = 0.01 µF, I(DELAYSET A-B) = I(DELAYSET C-D) = –500 µA, TA = TJ, unless otherwises stated.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Oscillator
Initial accuracy
TA = 25°C
0.85
1
1.19
MHz
Voltage stability
11 V
< VIN < 20 V
0.2%
2%
Total variation
Line, Temperature
0.8
1.2
MHz
Sync pin threshold
TJ = 25°C
3.8
Clock out peak
TJ = 25°C
4.3
V
Clock out low
TJ = 25°C
3.3
Clock out pulse width
R(CLOCKSYNC) = 3.9 kΩ
30
100
nsec
Maximum frequency (7)
R(FREQUEST) = 5 kΩ
2
MHz
Ramp Generator/Slope Compensation
Ramp current, minimum
I(SLOPE) = 10 µA, V(FREQSET) = VREF
–11
–14
µA
Ramp current, maximum
I(SLOPE) = 1 mA, V(FREQSET) = VREF
–0.8
–0.95
mA
Ramp valley
0
V
Ramp peak - clamping level
R(FREQSET) = 100 kΩ
3.8
4.1
5
V
Current Limit
Input bias
VCS+ = 3 V
2
5
μA
Threshold voltage
2.4
2.5
2.6
V
Delay to output (8)
85
150
nsec
Cycle-by-Cycle Current Limit
Input bias
VCS = 2.2 V
2
10
μA
Threshold voltage
1.85
2
2.15
V
Delay to output zero phase
110
300
ns
Soft Start/Reset Delay
Charge current
V(SOFTSTART) = 0.5 V
–20
–9
–3
μA
Discharge current
V(SOFTSTART) = 1 V
120
230
Restart threshold
4.3
4.7
V
Discharge level
300
mV
Output Drivers
Output low level
IOUT = 50 mA
0.2
0.4
V
Output high level
IOUT = –50 mA
1.5
2.5
Delay Set
Delay set voltage
I(DELAY) = –500 µA
2.3
2.4
2.6
V
Delay time (8)
I(DELAY) = –250 µA
(9)
150
250
600
nsec
(7)
Not production tested at
–55·C.
(8)
Not production tested.
Copyright
© 2011, Texas Instruments Incorporated
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