Datasheet

EN4
disabled
EN4
enabled
0
1
0
1
SLEW
slow
SLEW
medium
1
0
1
0
SLEW
fast
1
0
SYNC
external
clock
SYNC
LPM
1
0
1
0
SYNC
forced continuous
conduction mode
OR
spread spectrum
1
0
www.ti.com Setup
JP11 – EN4 is the jumper used to enable the linear regulator. The regulator is enabled when the EN4 is
high and disabled when low.
Figure 11. EN4 Jumper Setting
JP12 – SLEW is the jumper used to set the slew rate for the integrated high-side power MOSFET of
switch-mode converter 3. The slew rate can be set to slow, medium, or fast.
Figure 12. SLEW Jumper Setting
JP13 – SYNC is the external clock input for switching frequency synchronization of the buck converters
and to enable Low Power Mode (LPM). The external clock source can be attached to the center pin of
JP13. A high logic level on this pin ensures forced continuous mode operation of the buck controllers and
inhibits transition to low power mode. An open or low allows discontinuous mode operation, and entry into
low power mode at light loads. On the TPS43341, a high level enables frequency-hopping spread
spectrum while an open or a low level disables the spectrum.
Figure 13. SYNC Jumper Setting
5
SLVU463–July 2011 TPS4334xEVM Evaluation Module
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