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| 型号： | IRDC3640 |
| 厂商： | International Rectifier |
| 文件页数： | 2/17页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL SYNC BUCK CONTROLLER |
| 标准包装： | 1 |
| 系列： | * |
IRDC3640
CONNECTIONS and OPERATING INSTRUCTIONS
A well regulated +12V input supply should be connected to VIN+ and VIN-. A maximum 25A 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.
IR3640 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-.
Table I. Connections
Connection
VIN+
VIN-
Vcc+
Vcc-
VOUT+
VOUT-
Sync
PGood
Signal Name
V in (+12V)
Ground of V in
Vcc input
Ground for Vcc input
V out (+1.8V)
Ground of Vout
Synchronous input
Power Good Signal
LAYOUT
The PCB is a 6-layer board. All of layers are 2 Oz. copper. The IR3640 and other components are
mounted on the top and bottom side of the board.
Power supply decoupling capacitors, the Bootstrap capacitor and feedback components are located
close to IR3640. The feedback resistors are connected to the output voltage at the point of regulation
and are located close to IR3640. To improve efficiency, the circuit board is designed to minimize the
length of the on-board power ground current path.
2
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