Details, datasheet, quote on part number: UCC3800PWTR
PartUCC3800PWTR
CategoryPower Management => PWM Power Supply => Current Mode
TitleCurrent Mode
Descriptionti UCC3800, Low-power Bicmos Current-mode PWM
CompanyTexas Instruments, Inc.
DatasheetDownload UCC3800PWTR datasheet
Cross ref.Similar parts: UCC2800PW, UCC3800PW, TL2842, TL2842B, TL2843, TL2843B, TL2844, TL2844B, TL2845, TL2845B
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Features, Applications

FEATURES

100A Typical Starting Supply Current 500A Typical Operating Supply Current Operation to 1MHz Internal Soft Start Internal Fault Soft Start Internal Leading-Edge Blanking of the Current Sense Signal 1 Amp Totem-Pole Output 70ns Typical Response from Current-Sense to Gate Drive Output 1.5% Tolerance Voltage Reference Same Pinout as UC3842 and UC3842A

DESCRIPTION

The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching power supplies with minimal parts count. These devices have the same pin configuration as the UC1842/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. The UCC1800/1/2/3/4/5 family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC1803 and UCC1805 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC1802 and UCC1804 make these ideal choices for use in off-line power supplies. The UCC180x series is specified for operation from C, o the UCC280x series is specified for operation from +85 C, and o the UCC380x series is specified for operation from +70 C.

VCC Voltage (Note 2). 12.0V VCC Current (Note 2). 30.0mA OUT Current. 1.0A OUT Energy (Capacitive Load). 20.0J Analog Inputs (FB, CS). to 6.3V Power Dissipation or J Package). 1.0W Power Dissipation +25C (D Package). 0.65W Storage Temperature Range. to +150C Lead Temperature (Soldering, 10 Seconds). +300C Note 1: Values beyond which damage may occur. All voltages are with respect to GND. All currents are positive into the specified terminal. Consult Unitrode databook for information regarding thermal specifications and limitations of packages. Note 2: In normal operation VCC is powered through a current limiting resistor. Absolute maximum of 12V applies when VCC is driven from a low impedance source such that ICC does not exceed 30mA (which includes gate drive current requirement).

ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for TA +125C for TA +85C for TA +70C for UCC380x; VCC=10V (Note 3); RT=100k from REF to RC; CT=330pF from RC to GND; 0.1 F capacitor from VCC to GND; 0.1 F capacitor from VREF to GND. TA=TJ.

PARAMETER TEST CONDITIONS MIN Reference Section Output Voltage Load Regulation Line Regulation VCC=10V to Clamp VCC=10V to Clamp (IVCC=25mA) Total Variation Output Noise Voltage Long Term Stability Output Short Circuit UCCx800/1/2/4 (Note 7) UCCx803/5 (Note 10kHz, TJ=+25C (Note TA=+125C, 1000 Hours (Note mV mV/V V

UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for TA +125C for TA +85C for TA +70C for UCC380x; VCC=10V (Note 3); RT=100k from REF to RC; CT=330pF from RC to GND; 0.1 F capacitor from VCC to GND; 0.1 F capacitor from VREF to GND. TA=TJ.


 

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