Datasheet
LTC4100
4
4100fc
For more information www.linear.com/LTC4100
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DCIN
= 20V, V
DD
= 3.3V, V
BAT
= 12V unless otherwise noted. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
AC Present Comparator
V
ACP
DCDIV Threshold V
DCDIV
Rising from 1V to 1.4V
●
1.14 1.20 1.26 V
DCDIV Hysteresis 25 mV
DCDIV Input Bias Current V
DCDIV
= 1.2V –1 1 µA
ACP V
OH
I
ACP
= –2mA 2 V
ACP V
OL
I
ACP
= 1mA 0.5 V
DCDIV to ACP Delay V
DCDIV
= 1.3V 10 µs
SafetySignal Decoder
SafetySignal Trip (RES_COLD/RES_OR) R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6)
R
THB
= 54.9kΩ ±1%
●
95 100 105 kΩ
SafetySignal Trip (RES_IDEAL/RES_COLD) R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6)
R
THB
= 54.9kΩ ±1%
●
28.5 30 31.5 kΩ
SafetySignal Trip (RES_HOT/RES_IDEAL) R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6)
R
THB
= 54.9kΩ ±1%
●
2.85 3 3.15 kΩ
SafetySignal Trip (RES_UR/RES_HOT) R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6)
R
THB
= 54.9kΩ ±1%
●
425 500 575 Ω
Time Between SafetySignal Measurements DCDIV = 1.3V
DCDIV = 1V
32
250
ms
ms
DACs
Charging Current Resolution Guaranteed Monotonic Above I
MAX
/16 10 Bits
Charging Current Granularity R
ILIM
= 0
R
ILIM
= 10k ±1%
R
ILIM
= 33k ±1%
R
ILIM
= Open (or Short to V
DD
)
1
2
4
4
mA
mA
mA
mA
Wake-Up Charging Current (I
WAKE-UP
) All Values of R
ILIM
All Values of R
VLIM
80 (Note 5) mA
Charging Current Limit
CSP – BAT
R
ILIM
=
0 (0-1A)
Charging Current = 0x03FF (0x0400 Note 7)
97.3 107.3 mV
R
ILIM
=
10k ±1% (0-2A)
Charging Current = 0x07FE (0x0800 Note 7)
97.3 107.3 mV
R
ILIM
=
33k ±1% (0-3A)
Charging Current = 0x0BFC (0x0C00 Note 7)
72.3 82.3 mV
R
ILIM
=
0pen (or Short to V
DD
) (0-4A)
Charging Current = 0x0FFC (0x1000 Note 7)
97.3 107.3 mV
Charging V
oltage Resolution Guaranteed Monotonic (2.9V ≤ V
BAT
≤
28V) 11 Bits
Charging Voltage Granularity 16 mV
Charging Voltage Limit R
VLIM
= 0
Charging Voltage = 0x2260 (Note 7)
8.730 8.800 8.870 V
R
VLIM
= 10k ±1%
Charging Voltage = 0x3330 (Note 7)
12.999 13.104 13.209 V
R
VLIM
= 33k ±1%
Charging Voltage = 0x4400 (Note 7)
17.269 17.408 17.547 V
R
VLIM
= 100k ±1%
Charging Voltage = 0x5400 DCIN ≥ 22V
(Note 7)
21.538
21.712 21.886 V
R
VLIM
= 0pen (or Short to V
DD
)
Charging Voltage = 0x6D60 DCIN ≥ 29V
(Note 7)
27.781
28.006 28.231 V