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UCC28251 Datasheet(PDF) 5 Page - Texas Instruments

Part No. UCC28251
Description  UCC28251 Advanced PWM Controller With Prebias Operation
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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UCC28251 Datasheet(HTML) 5 Page - Texas Instruments

 
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UCC28251
www.ti.com
SLUSBD8E – FEBRUARY 2013 – REVISED DECEMBER 2014
Pin Functions (continued)
PIN
I/O
DESCRIPTION
QFN-20
PW-20
NAME
7
14
SRA
O
0.2-A sink/source synchronous rectifier output.
6
13
SRB
O
0.2-A sink/source synchronous rectifier output.
4
11
GND
I
Ground.
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range
(1) (2) (unless otherwise noted)
MIN
MAX
UNIT
VDD(3)
Input supply voltage
–0.3
20
OUTA, OUTB, SRA and SRB
–0.3
VDD + 0.3
VREF +
COMP
–0.3
0.3
V
Input voltages on SS and EN
–0.3
5.5
Input voltages on RT, PS, SP, ILIM, OVP, HICC, VSENSE, EA+ and EA-
–0.3
3.6
Input voltage on RAMP/CS
–0.3
4.3
Output voltage on VREF
–0.3
3.6
Lead temperature (soldering 10 sec) PW package
300
°C
Tstg
Storage temperature
–65
150
°C
(1)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
These devices are sensitive to electrostatic discharge; follow proper device handling procedures.
(3)
All voltages are with respect to GND unless otherwise noted. Currents are positive into, negative out of the specified pin. See Packaging
Section of the datasheet for thermal limitations and considerations of packages.
7.2 ESD Ratings
VALUE
UNIT
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)
±3000
V(ESD)
Electrostatic discharge
V
Charged-device model (CDM), per JEDEC specification JESD22-
±2000
C101(2)
(1)
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2)
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
Supply voltage range, VDD
4.7
12
17
V
Supply bypass capacitor, CVDD
1
µF
VREF bypass capacitor
0.47
2.20
Error amplifier input common mode range (REF/EA+, FB/EA-)
0
3.0
V
VSENSE input voltage range
0
3.3
RT resistor range
12.5
200
k
Ω
PS, SP resistor range
5
250
RAMP/CS voltage range
0
2.3
V
Operating junction temperature range
-40
150
°C
Copyright © 2013–2014, Texas Instruments Incorporated
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