UCC28180_15 Datasheet, PDF (4/45 Pages) Texas Instruments – UCC28180 Programmable Frequency, Continuous Conduction Mode (CCM), Boost Power Factor Correction (PFC) Controller

UCC28180
SLUSBQ5B – NOVEMBER 2013 – REVISED DECEMBER 2014
www.ti.com
PIN
NAME
NO.
VSENSE
6
Pin Functions (continued)
I/O
DESCRIPTION
Output Voltage Sense: An external resistor-divider network connected from this pin to the PFC output
voltage provides feedback sensing for regulation to the internal 5-V reference voltage. A small capacitor from
this pin to GND filters high-frequency noise. Standby disables the controller and discharges VCOMP when
the voltage at VSENSE drops below the Open-Loop Protection (OLP) threshold of 16.5%V_REF (0.82 V). An
I
internal 100-nA current source pulls VSENSE to GND during pin disconnection. Enhanced Dynamic
Response (EDR) rapidly returns the output voltage to its normal regulation level when a system line or load
step causes VSENSE to rise above 105% or fall below 95% of the reference voltage. Two level Output Over-
Voltage Protection (OVP): a 4-kΩ resistor connects VCOMP to ground to rapidly discharge VCOMP when
VSENSE exceeds 107% (V_{OVP_L}) of the reference voltage. If VSENSE exceeds 109% (V_{OVP_H}) of the
reference voltage, GATE output will be disabled until VSENSE drops below 102% of the reference voltage.
7 Specifications
7.1 Absolute Maximum Ratings⁽¹⁾
Over operating free-air temperature range, all voltages are with respect to GND (unless otherwise noted). Currents are
positive into and negative out of the specified terminal.
MIN
MAX
UNIT
Input voltage range
VCC, GATE
–0.3
22
V
FREQ, VSENSE, VCOMP, ICOMP
–0.3
7
ISENSE
–24
7
Input current range
VSENSE, ISENSE
–1
1
mA
Junction temperature, T_J
Lead temperature, T_SOL
Storage temperature, T_stg
Operating
Soldering, 10 s
–55
150
°C
300
°C
–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 condition beyond those included under “recommended operating
conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods of time may affect device reliability.
7.2 ESD Ratings
V_(ESD) Electrostatic discharge
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾
Charged-device model (CDM), per JEDEC specification JESD22-
C101 ⁽²⁾
VALUE
±2000
±500
(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.
UNIT
V
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
VCC input voltage from a low-impedance source
Operating junction temperature, T_J
Operating frequency
MIN
VCC_OFF + 1V
–40
18
MAX
21
125
250
UNIT
V
°C
kHz
4
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