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RC5011/5023
DEMONSTRATION BOARD
2
A
Jumper Settings
The board is fitted with several jumpers to enable each out-
put as well as the entire power supply system. The jumper
settings are presented in Table 1 and their locations are illus-
trated in Figure 2. Each jumper has three posts mounted per-
pendicular to the board. The middle post is connected to
appropriate the IC control pin, with the outer two pins con-
nected to VCC and GND, respectively. The output is dis-
abled by connecting the jumper between the center post and
VCC and is disabled by connecting it between the center
post and GND. The absence of a jumper will disable the out-
put.
NOTE:
Both the EN12V and the EN5 jumpers must be
connected to Vcc in order to enable the 12V output.
Precautions
Beware of ESD! It is recommended that this
demonstration board be used only in an ESD-controlled
location to reduce the risk of damage resulting from ESD-
related stress.
Use Kelvin connected test points. Voltage drops in the
main current path can greatly reduce the observed
efficiency characteristics of this demonstration board.
Do not attempt to draw more than 200mA from the 12V
output. Overloading this output will result in permanent
damage to the RC5011.
Power-up Check List
1.
Set up the jumpers as illustrated in Table 1, above.
2.
Connect the positive power lead to the Vbat terminal.
3.
Connect the positive lead of external 5V source to the
single post between the EN12V jumper and the +3.3V
OUT posts.
4.
Connect the negative power lead to one pair of GND
terminals (two pairs exist).
5.
Connect the negative lead of the external 5V to a pair of
GND terminals.
6.
Connect loads to desired outputs. Returns from the loads
may be connected to either pair of GND terminals.
7.
Apply power and check for correct output voltages. If no
output is observed, turn off power and check all connec-
tions again.
Table 1. Jumper Settings for RC5011 + RC5023
Demonstration Board
Active Output
2.9V
3.3V
5V
12V
Jumper
Designation
EN2
EN3
EN5
EN12V
EN5
Jumper
Position
VCC
VCC
VCC
VCC
VCC