XD494 DIP16 / XL494 SOP16 1 Features 3 Description The XD494 device incorporates all the functions 1 Complete PWM Power-Control Circuitry required in the construction of a pulse-width- Uncommitted Outputs for 200-mA Sink or modulation (PWM) control circuit on a single chip. Source Current Designed primarily for power-supply control, this Output Control Selects Single-Ended or device offers the flexibility to tailor the power-supply Push-Pull Operation control circuitry to a specific application. Internal Circuitry Prohibits Double Pulse at The XD494 device contains two error amplifiers,an Either Output on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a Variable Dead Time Provides Control Over 5-V, 5%-precision regulator, and output-control Total Range circuits. Internal Regulator Provides a Stable 5-V The error amplifiers exhibit a common-mode voltage Reference Supply With 5% Tolerance range from 0.3 V to V 2 V. The dead-time CC Circuit Architecture Allows Easy Synchronization control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator 2 Applications can be bypassed by terminating RT to the reference Desktop PCs output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail Microwave Ovens power supplies. Power Supplies: AC/DC, Isolated, The uncommitted output transistors provide either With PFC, > 90 W common-emitter or emitter-follower output capability. Server PSUs The XD494 device provides for push-pull orsingle- Solar Micro-Inverters ended output operation, which can be selected Washing Machines: Low-End and High-End through the output-control function. The architecture of this device prohibits the possibility of either output E-Bikes being pulsed twice during push-pull operation.The Power Supplies: AC/DC, Isolated, XD494C device is characterized foroperationfrom No PFC, < 90 W XL494 0C to 70C. The device ischaracterizedfor Power: Telecom/Server AC/DC Supplies: operation from 40C to 85C. Dual Controller: Analog (1) Smoke Detectors 5 Device Information Solar Power Inverters PART NUMBER PACKAGE (PIN) BODY SIZE SOIC (16) 9.90 mm 3.91 mm PDIP (16) 19.30 mm 6.35 mm 494 SOP (16) 10.30 mm 5.30 mm TSSOP (16) 5.00 mm 4.40 mm 4 Pinout Drawing D, DB, N, NS, OR PW PACKAGE (TOP VIEW) 1IN+ 1 16 2IN+ 1IN 2 15 2IN FEEDBACK 3 14 REF DTC 4 13 OUTPUTCTRL CT 5 12 V CC 6 11 RT C2 7 10 GND E2 8 9 C1 E1 1 1 XD494 DIP16 / XL494 SOP16 6 Pin Configuration and Functions D, DB, N, NS, OR PW PACKAGE (TOP VIEW) 1IN+ 2IN+ 1 16 1IN 2 15 2IN FEEDBACK 3 14 REF DTC 4 13 OUTPUTCTRL 5 12 CT V CC 6 11 RT C2 7 10 GND E2 8 9 C1 E1 Pin Functions PIN TYPE DESCRIPTION NAME NO. 1IN+ 1 I Noninverting input to error amplifier 1 1IN- 2 I Inverting input to error amplifier 1 2IN+ 16 I Noninverting input to error amplifier 2 2IN- 15 I Inverting input to error amplifier 2 C1 8 O Collector terminal of BJT output 1 C2 11 O Collector terminal of BJT output 2 CT 5 Capacitor terminal used to set oscillator frequency DTC 4 I Dead-time control comparator input E1 9 O Emitter terminal of BJT output 1 E2 10 O Emitter terminal of BJT output 2 FEEDBACK 3 I Input pin for feedback GND 7 Ground OUTPUT 13 I Selects single-ended/parallel output or push-pull operation CTRL REF 14 O 5-V reference regulator output RT 6 Resistor terminal used to set oscillator frequency V 12 Positive Supply CC 2