Rainbow-electronics ATA6626 User Manual

1. IntroductionThe development board for the ATA6621/22/24 (ATA6621-EK, ATA6622-EK,ATA6624-EK) is designed to give designers a quick start with the IC

104970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 3-7. Load- transient Response Ch1: IOUT, Ch2: PVCC Figure 3-8. Startup Response Ch1: VS, Ch2:

114970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 3-9. Switching from Silent to Normal Mode Ch1: NRES, Ch2: PVCC Figure 3-10. Output Voltage PVC

124970A–AUTO–01/07ATA6621/22/24 Development Board4. Schematic and Layout of the Development Board for the ATA6621/22/24Figure 4-1. Schematic of the De

134970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 4-2. ATA6621/22/24 Board Component Placement; Top Side, Top View Figure 4-3. ATA6621/22/24 Dev

144970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 4-4. ATA6621/22/24 Development Board; Bottom Side, Top View (as if PCB Were Transparent)

154970A–AUTO–01/07ATA6621/22/24 Development Board5. The Development Board in a Simple ApplicationTo show just how easy it is to develop a LIN-based ap

164970A–AUTO–01/07ATA6621/22/24 Development BoardFor testing purposes two jumpers (JP1 and JP2) have been added to the LIN part of this appli-cation i

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24970A–AUTO–01/07ATA6621/22/24 Development BoardAnother difference is unequal watchdog timing (see Section 2.3 on page 4).The combination of the featu

34970A–AUTO–01/07ATA6621/22/24 Development BoardAs the window watchdog of the ATA6621/22/24 is already active in the Pre-normal mode (FailSafe mode),

44970A–AUTO–01/07ATA6621/22/24 Development Board2.3 The Window Watchdog (PTRIG, NTRIG and NRES) The watchdog anticipates a trigger signal from the mic

54970A–AUTO–01/07ATA6621/22/24 Development BoardFor the ATA6622 and ATA6624 the resistor R3 at pin WD_OSC with the same value of 51 kΩresults in the d

64970A–AUTO–01/07ATA6621/22/24 Development Board2.5 Temp Pin (TEMP) (ATA6621 Only)Besides the internal temperature monitoring of the voltage regulator

74970A–AUTO–01/07ATA6621/22/24 Development Board3. Boosting the Voltage RegulatorFor some applications there is a need for a higher current than the i

84970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 3-2, Figure 3-3 and Figure 3-4 show the maximum output current (Imax) of the voltageregulator a

94970A–AUTO–01/07ATA6621/22/24 Development BoardFigure 3-5 to Figure 3-10 on page 11 show some typical operating characteristics measured atthe ATA662