UCC2808A-2Q1

UCC2808A-1Q1 UCC2808A-2Q1 www.ti.com SGLS183B – AUGUST 2003 – REVISED JULY 2012 Low Power Current Mode Push-Pull PWM Check for Samples: UCC2808A-1Q1 , UCC2808A-2Q1 FEATURES 1 Qualified for Automotive Applications ESD Protection Exceeds 1500 V Per MIL-STD- 883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Dual Output Drive Stages in Push-Pull Configuration Current Sense Discharge Transistor to Improve Dynamic Response 130-μA Typical Starting Current 1-mA Typical Run Current Operation to 1 MHz Internal Soft Start On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product On Chip VDD Clamping Output Drive Stages Capable of 500-mA PeakSource Current, 1-A Peak-Sink Current D PACKAGE (TOP VIEW) COMP FB CS RC 1 2 3 4 8 VDD 7 OUTA 6 OUTB 5 GND OUTA VDD COMP FB PW PACKAGE (TOP VIEW) 18 27 36 45 OUTB GND RC CS DESCRIPTION The UCC2808A-xQ1 is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A-xQ1 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 UCC2808A-xQ1 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...