4
dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
QUICK START PROCEDURE
Figure 4. LTC4000/LTC3789 System Block Diagram, DC1721B-A
Rsense-input
A5
A7
A6
A4
Gm
A10
A8
A9
Rsense-charge
DC - DC CONVERTER
ITH
LTC4000
Gm
Gm
Gm
Gm
LTC3789
NOT ON THE BOARD
GND
GND
+
+
RC1
RC1
CC1
CC1
VOUT-SYS
VOUT-SYS
BAT
BAT
VIN
VIN
10nF
10nF
+
+
CC2
CC2
Figure 3. Efficiency from V
IN
to V
OUT-SYS
DC1721A LTC4000 and
LTC3789 Efficiency
I
OUT
(A)
0.5
EFFICIENCY (%)
100
95
85
90
80
2.5
4.5
1.5
3.5
5.5
V
IN
= 36V
V
IN
= 24V
V
IN
= 6V
V
IN
= 15V
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