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ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - battery management Charge management Multi-Chemistry QFN 20 (4x4) Surface-mount
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LTC4012/
LTC4012-1/LTC4012-2
6
4012fa
Battery Load Dump
BATTERY VOLTAGE
(500mV/DIV)
LOAD
STATE
TIME (1ms/DIV)
CLP = 20V
V
OUT
= 12.3V
4012 G06
DISCONNECT
RECONNECT
3A
2A
12.1V
1A
1A
typical perForMance characteristics
Efficiency at DCIN = 20V, BAT = 8V
V
FB
Line Regulation
CHARGE CURRENT (A)
0
80
EFFICIENCY (%)
POWER LOSS(mW)
85
90
100
100
1000
10000
0.5
1 1.5 2
4012 G01
2.5 3
95
POWER LOSS
EFFICIENCY
R
SENSE
= 33mΩ
R
IN
= 3.01k
Efficiency at DCIN = 20V, BAT = 12V
CHARGE CURRENT (A)
0
80
EFFICIENCY (%)
POWER LOSS(mW)
85
90
100
100
1000
10000
0.5
1 1.5 2
4012 G02
2.5 3
95
EFFICIENCY
POWER LOSS
R
SENSE
= 33mΩ
R
IN
= 3.01k
Efficiency at DCIN = 20V, BAT = 16V
CHARGE CURRENT (A)
0
80
EFFICIENCY (%)
POWER LOSS(mW)
85
90
100
100
1000
10000
0.5
1 1.5 2
4012 G03
2.5 3
95
EFFICIENCY
POWER LOSS
R
SENSE
= 33mΩ
R
IN
= 3.01k
BATTERY VOLTAGE (V)
0
75
R
ON
(Ω)
100
150
175
200
10
20
25
300
4012 G05
125
5 15
225
250
275
CLP = BAT + 3V
(CLP ≥ 6V)
FBDIV Pin R
ON
vs Battery Voltage
(T
A
= 25°C unless otherwise noted. L = IHLP-2525 6.8µH)
Charge Current Accuracy
BATTERY VOLTAGE (V)
0
–6
CHARGE CURRENT ERROR (%)
–4
–3
–2
108
20
2422
2
4012 G07
–5
642 1412 16 18
–1
0
1
DCIN = 12V
R
PROG
= 26.7k
DCIN = 24V
R
PROG
= 35.7k
R
SENSE
= 33mΩ
R
IN
= 3.01k