Linear Technology DC2147A Demo Manual page 3

Quick start proceDure
5. (Optional) For optional load transient test, apply an
adjustable pulse signal between IOSTEP CLK and
GND test point. Pulse amplitude sets the load step
current amplitude. The output transient current can
be monitored at the BNC connector J3 (50mV/A).
The pulse signal should have very small duty cycle
(< 10%) to limit the thermal stress on the transient
load circuit. Switch the jumper resistors R34 or R35
(on the backside of boards) to apply load transient
on channel 1 or channel 2 correspondingly.
6. (Optional) LTM4631 can be synchronized to an exter-
nal clock signal. Place the JP1 jumper on EXT_CLK
and apply a clock signal (0V ~ 5V, square wave) on
the CLKIN test point.
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DEMO MANUAL DC2147A
7. (Optional) The outputs of LTM4631 can track another
supply. The jumpers JP4 and JP5 allow choosing soft-
start or output tracking. If tracking external voltage
is selected, the corresponding test points, TRACK1
and TRACK2, need to be connected to a valid voltage
signal.
8. (Optional) LTM4631 can be configured for a 2-phase
single output at up to 20A on DC2147A. Install 0Ω
resistors on R
R . Output voltage is set by R
19
V
OUT
Figure 1. Test Setup of DC2147A
, R , R , R
14 17 28 39
25
= 0.6V(1+60.4K/R ).
25
and remove R ,
7
based on equation
dc2147af
3