Datasheet

LTC4020
42
4020fd
For more information www.linear.com/LTC4020
© LINEAR TECHNOLOGY CORPORATION 2013
LT 0416 REV D • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com/LTC4020
relaTeD parTs
Typical applicaTion
Remote 24V to 55V (48V system) input to 12-cell Li-Ion (48V) PowerPath charger/system supply. 5A inductor current limit with 2.5A
battery charge current limit. Minimum V
IN
is 24V as input regulation limits voltage loss due to line impedance. Battery termination
voltage is 48V with maximum output voltage of 52.8V. Instant-on functionality limits minimum regulated output voltage to 40.8V.
PART NUMBER DESCRIPTION COMMENTS
LTC3789 High Efficiency, Synchronous, 4 Switch Buck-Boost Controller Improved LTC3780 with More Features
LT3845 High Voltage Synchronous Current Mode Step-Down Controller For Medium/High Power, High Efficiency Supplies
LT3650 High Voltage 2A Monolithic Li-Ion Battery Charger 3mm × 3mm DFN-12 and MSOP-12 Packages
LT3651 High Voltage 4A Monolithic Li-Ion Battery Charger 4A Synchronous Version of LT3650 Family
LT3652/LT3652HV Power Tracking 2A Battery Chargers Multi-Chemistry, Onboard Termination
LTC4009 High Efficiency, Multi-Chemistry Battery Charger Low Cost Version of LTC4008, 4mm × 4mm QFN-20
LTC4012 High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control Similar to LTC4009 Adding PowerPath Control
LT3741 High Power, Constant Current, Constant Voltage, Step-Down Controller Thermally Enhanced 4mm × 4mm QFN and 20-Pin TSSOP
LT8705 80V
IN
/V
OUT
Sync Buck-Boost 4-SW Controller Single Inductor, TSSOP-38 and 5mm × 7mm QFN-38
R
SENSEA
0.01
Si7850DP
Si7850DP
Si7850DP
Si7850DP
R
SENSEB
0.01
V
IN
24V TO 55V
LTC4020
SGND
BACK
PGND
R
T
, 100k
PV
IN
BG1
SW1
TG1
BST1
SGND
SENSGND
SENSBOT
SENSTOP
SENSVIN
RT
SHDN
V
IN_REG
MODE
TIMER
RNG_SS
12-CELL Li-ION (48V)
4020 TA05
INTV
CC
BG2
SW2
TG2
BST2
SGND
VC
ITH
V
FBMAX
I
LIMIT
CSOUT
CSP
CSN
BGATE
BAT
V
FBMIN
FBG
VFB
NTC
56µF
×2
1µF
191k
10k
12k
STAT1
STAT2
1µF
SBR0560S1
4.7µF
33k
100Ω
R
CS
0.02Ω
Si7465DP
SBR0560S1
BZX84C6V2L
680pF
100Ω
365k
1.5nF
2nF
0.33µF
356k
20k
20k
1µF
R
NTC
10k
0.1µF
4.7µF
56µF
×2
V
OUT
IHLP-5050FD-5A
MBRS360
22µH
0.033µF
+
+
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