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UCC3808PW-2 Datasheet(PDF) 1 Page - Texas Instruments |
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UCC3808PW-2 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 10 page UCC2808-1, UCC2808-2, UCC3808-1, UCC3808-2 LOW POWER CURRENT MODE PUSH-PULL PWM SLUS168D – APRIL 1999 – REVISED AUGUST 2002 1 www.ti.com D Dual Output Drive Stages in Push-Pull Configuration D 130-µA Typical Starting Current D 1-mA Typical Run Current D Operation to 1-MHz D Internal Soft Start D On Chip Error Amplifier With 2-MHz Gain Bandwidth Product D On Chip VDD Clamping D Output Drive Stages Capable Of 500-mA Peak Source Current, 1-A Peak Sink Current description The UCC3808 is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC3808 contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency current-mode switching power supplies with minimal external parts count. The UCC3808 dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than 50%. (continued) block diagram UDG-02116 3 1 2 8 7 6 5 4 OSCILLATOR S Q R RC 1.2R R 0.5 V PEAK CURRENT COMPARATOR Q Q T S Q R S Q R VDD VOLTAGE REFERENCE 14 V PWM COMPARATOR PWM LATCH SOFT START 0.5 V VDD–1 V 0.75 V 2.2 V 2.0 V FB COMP CS VDD OUTA OUTB GND SLOPE = 1 V/ms VDD OK OVERCURRENT COMPARATOR 22 k Note: Pinout shown is for SOIC and PDIP packages. TSSOP pinout is different. Ω Copyright 2002, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 8 7 6 5 COMP FB CS RC VDD OUTA OUTB GND D OR N PACKAGE (TOP VIEW) 1 2 3 4 8 7 6 5 PW PACKAGE (TOP VIEW) OUTB GND RC CS OUTA VDD COMP FB |
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Similar Description - UCC3808PW-2 |
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