 English |
|
|
|
|
|
|
|
| UCC28950 Datasheet, PDF (6/42 Pages) Texas Instruments – Green Phase-Shifted Full-Bridge Controller With Synchronous Rectification | |||
| |||
| ◁ |
UCC28950
SLUSA16 â MARCH 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
kΩ, 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
DCM threshold, T = 25°C
VDCM = 0.4 V, Sweep CS confirm there are OUTE
and OUTF pulses
0.37
0.39
0.41
VDCM
DCM threshold, T = 0°C to
85°C (8)
VDCM = 0.4 V, Sweep CS, confirm there are OUTE
and OUTF pulses
0.364 0.390 0.416 V
DCM threshold, T= -40°C to VDCM = 0.4 V, Sweep CS, confirm there are OUTE
125°C (8)
and OUTF pulses
0.35
0.39
0.43
IDCM,SRC DCM Sourcing Current
CS < DCM threshold
TMIN
Total range
RTMIN = 88.7 kΩ
OUTPUTS OUTA, OUTB, OUTC, OUTD, OUTE, OUTF
ISINK/SRC Sink/Source peak current(8)
TR
Rise time
CLOAD = 100 pF
TF
Fall time
CLOAD = 100 pF
RSRC
Output source resistance
IOUT = 20 mA
RSINK
Output sink resistance
IOUT = 20 mA
THERMAL SHUTDOWN
Rising threshold(8)
Falling threshold(8)
14
20
26 µA
425
525
625 ns
0.2
9
7
10
20
5
10
A
25
ns
25
35
Ω
30
160
140
°C
Hysteresis
20
(8) Verified during characterization only.
6
Submit Documentation Feedback
Product Folder Link(s): UCC28950
Copyright © 2010, Texas Instruments Incorporated
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese