Datasheet

LTC1760
4
1760fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Trip Points
V
TR
DCDIV/LOPWR Threshold V
DCDIV
or V
LOPWR
Falling
C-Grade (Note 6)
I-Grade (Note 6)
l
l
1.166
1.162
1.19
1.19
1.215
1.215
V
V
V
THYS
DCDIV/LOPWR Hysteresis Voltage V
DCDIV
or V
LOPWR
Rising 30 mV
I
BVT
DCDIV/LOPWR Input Bias Current V
DCDIV
or V
LOPWR
= 1.19V 20 200 nA
V
TSC
Short-Circuit Comparator Threshold V
SCP
– V
SCN
, V
CC
≥ 5V
C-Grade (Note 6)
I-Grade (Note 6)
l
l
90
88
100
100
115
115
mV
mV
V
FTO
Fast PowerPath Turn-Off Threshold V
DCDIV
Rising from V
CC
6 7 7.9 V
V
OVSD
Overvoltage Shutdown Threshold as a
Percent of Programmed Charger Voltage
V
SET
Rising from 0.8V until TGATE and BGATE
Stop Switching
107 %
DACs
I
RES
I
DAC
Resolution Guaranteed Monotonic 10 Bits
t
IP
t
ILOW
I
DAC
Pulse Period:
Normal Mode
Wake-Up Mode
610
50
15 μs
ms
Charging Current Granularity R
ILIMIT
= 0 (Short I
LIMIT
to GND)
R
ILIMIT
= 10k ±1%
R
ILIMIT
= 33k ±1%
R
ILIMIT
= Open (or Short I
LIMIT
to V
CC2
)
1
2
4
4
mA
mA
mA
mA
I
WAKE_UP
Wake-Up Charging Current (Note 5) 60 80 100 mA
I
LIMIT
Charging Current Limit C-Grade (Note 6)
R
ILIMIT
= 0 (Short I
LIMIT
to GND)
R
ILIMIT
= 10k ±1%
R
ILIMIT
= 33k ±1%
R
ILIMIT
= Open (or Short I
LIMIT
to V
CC2
)
I-Grade (Note 6)
R
ILIMIT
= 0 (Short I
LIMIT
to GND)
R
ILIMIT
= 10k ±1%
R
ILIMIT
= 33k ±1%
R
ILIMIT
= Open (or Short I
LIMIT
to V
CC2
)
l
l
l
l
l
l
l
l
980
1960
2490
3920
930
1870
2380
3750
1000
2000
3000
4000
1000
2000
3000
4000
1070
2140
3210
4280
1110
2220
3320
4430
mA
mA
mA
mA
mA
mA
mA
mA
V
RES
V
DAC
Resolution Guaranteed Monotonic (5V < V
BAT
< 25V) 11 Bits
V
STEP
V
DAC
Granularity 16 mV
V
LIMIT
Charging Voltage Limit
(Note 7)
R
VLIMIT
= 0 (Short V
LIMIT
to GND)
R
VLIMIT
= 10k ±1%
R
VLIMIT
= 33k ±1%
R
VLIMIT
= 100k ±1%
R
VLIMIT
= Open (or Short V
LIMIT
to V
CC2
)(Note 13)
l
l
l
l
l
8400
12608
16832
21024
8432
12640
16864
21056
32768
8464
12672
16896
21088
mV
mV
mV
mV
mV
Charge MUX Switches
t
ONC
GCH1/GCH2 Turn-On Time V
GCHX
– V
SCHX
> 3V, C
LOAD
= 3000pF 5 10 ms
t
OFFC
GCH1/GCH2 Turn-Off Time V
GCHX
– V
SCHX
< 1V, from Time of
V
CSN
< V
BATX
– 30mV, C
LOAD
= 3000pF
15 μs
V
CON
CH Gate Clamp Voltage
GCH1
GCH2
I
LOAD
= 1μA
V
GCH1
– V
SCH1
V
GCH2
– V
SCH2
5
5
5.8
5.8
7
7
V
V
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
junction temperature range, otherwise specifi cations are at T
A
= 25°C (Note 6). V
DCIN
= 20V, V
BAT1
= 12V, V
BAT2
= 12V, V
VDDS
= 3.3V,
V
VCC2
= 5.2V unless otherwise noted.