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IRDC3843A Datasheet(PDF) 2 Page - International Rectifier |
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IRDC3843A Datasheet(HTML) 2 Page - International Rectifier |
2 / 16 page IRDC3843A 02/09/10 2 A well regulated +12V input supply should be connected to VIN+ and VIN-. A maximum 3A load should be connected to VOUT+ and VOUT-. The connection diagram is shown in Fig. 1 and inputs and outputs of the board are listed in Table I. IR3843A has two input supplies, one for biasing (Vcc) and the other as input voltage (Vin). Separate supplies should be applied to these inputs. Vcc input should be a well regulated 4.5V-5.5V supply and it would be connected to Vcc+ and Vcc-. CONNECTIONS and OPERATING INSTRUCTIONS LAYOUT The PCB is a 4-layer board. All of layers are 2 Oz. copper. It is a double sided board with components mounted on both sides. Power supply decoupling capacitors, the Bootstrap capacitor and feedback components are located close to IR3843A. The feedback resistors are connected to the output voltage at the point of regulation and are located close to the SupIRBuck. To improve efficiency, the circuit board is designed to minimize the length of the on-board power ground current path. Table I. Connections Sequence Input Seq. V out (+1.8V) VOUT+ Ground for Vcc input Vcc- Vcc input Vcc+ Enable Enable Power Good Signal PGood Ground of V out VOUT- Ground of V in VIN- V in (+12V) VIN+ Signal Name Connection |
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Similar Description - IRDC3843A |
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