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UC2875-EP Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce UC2875-EP
Description  PHASE SHIFT RESONANT CONTROLLER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2875-EP Fiches technique(HTML) 6 Page - Texas Instruments

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UC2875EP
PHASE SHIFT RESONANT CONTROLLER
SGLS233A − FEBRUARY 2004 − REVISED DECEMBER 2008
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, TA = −25_C to 110_C, VC = VIN = 12 V, RFREQSET = 12 kW, CFREQSET = 330 pF,
RSLOPE = 12 kW, CRAMP = 200 pF, CDELAYSET A−B = CDELAYSET C−D = 0.01 mF,
IDELAYSET A−B = IDELAYSET C−D = −500 mA, and TA = TJ (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Output Drivers
Output low level
IOUT = 50 mA
0.2
0.4
V
Output low level
IOUT = 500 mA
1.2
2.6
V
Output high level
IOUT = −50 mA
1.5
2.5
V
Output high level
IOUT = −500 mA
1.7
2.6
V
Delay Set
Delay set voltage
IDELAY = −500 µA
2.3
2.4
2.6
V
Delay time
IDELAY = −250 µA, See Notes 2 and 5
150
250
600
ns
NOTES:
1. Phase shift percentage (0% = 0
_, 100% = 180_) is defined as θ = 200/T Φ% , where θ is the phase shift, and Φ and T are defined
in Figure 1. At 0% phase shift,
Φ is the output skew.
2. Delay time is defined as delay = T (1/2−(duty cycle)), where T is defined in Figure 1.
3. Ramp offset voltage has a temperature coefficient of about 4.0 mV/
_C.
4. Zero phase shift voltage has a temperature coefficient of about 2.0 mV/
_C.
5. Delay time can be programmed via resistors from the delay set pins to ground. Delay time
≈ (62.5 x 10−12) / IDELAY sec where
IDELAY = Delay set voltage / RDELAY. The recommended range for IDELAY is 25 µA v IDELAY v 1 mA
6. Ramp delay to output time is defined in NO TAG.
Figure 1. Phase Shift and Output Skew
Duty Cycle = t/T
Period = T
TDHL(A to C) = TDHL(B to D) = φ
Phase Shift, Output Skew, and Delay Time Definitions
φ
Figure 2. Delay Time


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