IRDC3843 International Rectifier, IRDC3843 Datasheet - Page 2
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IRDC3843
Manufacturer Part Number
IRDC3843
Description
BOARD, EVALUATION, IR3843
Manufacturer
International Rectifier
Type
DC-DC Voltage Regulatorr
Datasheet
1.IRDC3843.pdf
(16 pages)
Specifications of IRDC3843
Svhc
No SVHC (15-Dec-2010)
Kit Features
Programmable Soft Start, Programmable Over Current Protection, Pre-Bias Start Up
Mcu Supported Families
IR3843
Silicon Manufacturer
International Rectifier
Kit Contents
Board
Features
Compact, High Performance And Flexible Solution, 600kHz Frequency
Core Architecture
Power Management -
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
LAYOUT
The PCB is a 4-layer board. All of layers are 2 Oz. copper.
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.
CONNECTIONS and OPERATING INSTRUCTIONS
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-.
02/09/10
Connection
VIN+
VIN-
Vcc+
Vcc-
VOUT-
VOUT+
Enable
Seq.
PGood
Table I. Connections
Signal Name
V
Ground of V
Vcc input
Ground for Vcc input
Ground of V
V
Enable
Sequence Input
Power Good Signal
in
out
(+12V)
(+1.8V)
in
out
It
is a double sided board with components
IRDC3843A
2