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UCC28950 Datasheet(PDF) 6 Page - Texas Instruments

Part # UCC28950
Description  Green Phase-Shifted Full-Bridge Controller With Synchronous Rectification
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC28950 Datasheet(HTML) 6 Page - Texas Instruments

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UCC28950
SLUSA16A – MARCH 2010 – REVISED JULY 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
(1) (continued)
VDD = 12 V, TA = TJ = -40°C to 125°C, CVDD = 1 µF, CREF = 1 µF, RAB = 22.6 kΩ, RCD = 22.6 kΩ , REF = 13.3 kΩ, RSUM = 124
k
Ω, RMIN = 88.7 kΩ, RT = 59 kΩ connected between RT pin and 5-V voltage supply to set FSW = 100 kHz (FOSC = 200 kHz)
(unless otherwise noted). All component designations are from the Typical Application Diagram.
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNITS
Light Load Efficiency Circuit
VDCM = 0.4 V, Sweep CS confirm there are OUTE
DCM threshold, T = 25°C
0.37
0.39
0.41
and OUTF pulses
DCM threshold, T = 0°C to
VDCM = 0.4 V, Sweep CS, confirm there are OUTE
VDCM
0.364
0.390
0.416
V
85°C (8)
and OUTF pulses
DCM threshold, T= -40°C to
VDCM = 0.4 V, Sweep CS, confirm there are OUTE
0.35
0.39
0.43
125°C (8)
and OUTF pulses
IDCM,SRC
DCM Sourcing Current
CS < DCM threshold
14
20
26
µA
TMIN
Total range
RTMIN = 88.7 kΩ
425
525
625
ns
OUTPUTS OUTA, OUTB, OUTC, OUTD, OUTE, OUTF
ISINK/SRC
Sink/Source peak current(8)
0.2
A
TR
Rise time
CLOAD = 100 pF
9
25
ns
TF
Fall time
CLOAD = 100 pF
7
25
RSRC
Output source resistance
IOUT = 20 mA
10
20
35
Ω
RSINK
Output sink resistance
IOUT = 20 mA
5
10
30
THERMAL SHUTDOWN
Rising threshold(8)
160
Falling threshold(8)
140
°C
Hysteresis
20
(8)
Verified during characterization only.
6
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): UCC28950


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