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UCC28230 Datasheet(PDF) 4 Page - Texas Instruments

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Part No. UCC28230
Description  Advanced PWM Controller For Bus Converters
Download  7 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

UCC28230 Datasheet(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
(1)
UCC28230
UCC28231
SLUS814 – FEBRUARY 2008
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNITS
Bias Currents
IDD(off)
Startup current
VDD is 200 mV below UVLO falling threshold
150
238
µA
IDD
Operating supply current
1.5
4
mA
Under Voltage Lockout
Start threshold
5.9
6.3
6.8
Minimum operating voltage after start
5.3
5.7
6.1
V
Hysteresis
0.55
0.6
0.75
Soft Start (SS Pin)
ISS
Charge current
VSS = 0 V
20
25
30
µA
VSS_STD Shutdown/restart/reset threshold
0.3
0.55
0.8
VSS_FP
Soft-start first pulse threshold
0.85
V
VSS_PU
Pull up threshold
3.3
3.5
3.7
VSS_CL
Clamp voltage
4.2
4.5
4.7
OFF Time Programming
TOFF
Off time between O1_D and O2_D
33
40
47
OS = 12.7 k
Ω, CS = 0.3 V, OST = 1 V
Dead time between O1_D and O1_DIN,
TDT
10
O2_D and O2_DIN
TOFFR
Off time between O1_D and O2_D
33
40
47
ns
OS = 12.7 k
Ω, CS = 0 V, OST = VREF
Dead time between O1_D and O1_DIN,
TDTF
10
O2_D and O2_DIN
ΔTOFFR Off time matching
2
IHYST
Hysteresis current source
10
µA
VCS(off)
Off time control threshold
OS = 12.7 k
Ω, OST = 1 V, CS rising
0.1
V
TOFF(ma
Maximum off time at low CS
OS = 12.7 k
Ω, OST = 1 V, CS = 0 V
165
235
ns
x)
Switching Frequency at O1_D and O2_D Outputs
Starting frequency
VSS = VSS(FP) + 100 mV
92
100
108
FSW(nom
Nominal frequency
VSS = VSS(PU) + 100 mV
92
100
108
)
kHz
FSW(max
Maximum frequency
VSS = 1.8 V
450
500
550
)
VREF Output Voltage
0
≤ IR ≤ 10 mA, 7 V ≤ VDD ≤ 17 V,
VREF5
Output voltage (UCC28230)
4.925
5
5.075
-40
°C ≤ T
J ≤ 125°C
V
0
≤ IR ≤ 10 mA, 7 V ≤ VDD ≤ 17 V,
VREF3
Output voltage (UCC28231)
3.25
3.3
3.35
-40
°C ≤ T
J ≤ 125°C
ΔVREF/
Line regulation
7 V
≤ VDD ≤ 17 V, IR = 1 mA
0.3
1
mV/V
ΔVDD
ΔVREF/
Load regulation
0
≤ IR ≤ 10 mA
1.3
3 mV/mA
ΔIREF
ISCC
Short circuit current
VREF = 0 V
-35
-25
-15
mA
(1)
Typical values for TA + 25°C.
4
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Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): UCC28230 UCC28231


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