Datasheet

LTC4110
5
4110fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. Unless otherwise specifi ed, V
DCIN
= V
DCOUT
= V
DCDIV
= 12V, V
BAT
= 8.4V,
GND = SGND = CLP = CLN = SHDN = 0V and R
VREF
= 49.9k. All currents into device pins are positive and all currents out of device pins
are negative. All voltages are referenced to GND, unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input and Battery Ideal Diodes and Switches
V
FR
Forward Regulation Voltage (V
DCIN
-V
DCOUT
,
V
BAT
-V
DCOUT
)
2.7V ≤ V
DCIN
≤ 19V
l
10 20 32 mV
V
REV
Reverse Voltage Turn-Off Voltage
(V
DCIN
-V
DCOUT
, V
BAT
-V
DCOUT
)
2.7V ≤ V
DCIN
≤ 19V
l
–30 –18 –8 mV
V
GON
“ON” Gate Clamping Voltage (V
DCIN
-V
INID
,
V
BAT
-V
BATID
)
I
INID
, I
BATID
= 1μA 7 8.3 9.7 V
V
GOFF
“OFF” Gate Voltage (V
DCIN
-V
INID
, V
BAT
-V
BATID
)I
INID
, I
BATID
= –10μA
V
SHDN
= 0V and V
DCIN
(Shutdown)
0.25 V
V
FO
BATID Fast-On Voltage Comparator Threshold I
BATID
> 500µA 45 100 mV
t
IIDON
t
IIDOFF
INID Pin Delay Times
Turn “ON”
Turn “OFF”
C
INID
= 10nF
DCIN is Switched Between 12.2V and 11.8V
From DCOUT – V
GOFF
to DCOUT –6V
From DCOUT – V
GON
to DCOUT –1.5V
450
8
700
20
µs
µs
t
BIDON
t
BIDOFF
BATID Pin Delay Times
Turn “ON”
Turn “OFF”
C
BATID
= 2.5nF
BAT is Switched Between 12.2V and 11.8V
From DCOUT – V
GOFF
to DCOUT –6V
From DCOUT – V
GON
to DCOUT –1.5V
15
8
60
20
µs
µs
PWM Flyback Converter
V
OHF
CHGFET, DCHFET High I
CHGFET
, I
DCHFET
= –1mA 4.5 4.75 5.25 V
V
OLF
CHGFET, DCHFET Low I
CHGFET
, I
DCHFET
= 1mA 50 mV
V
OLFX
CHGFET, DCHFET in Shutdown and Backup
Modes
V
DCIN
= V
DCDIV
= V
DCOUT
= 0V (Shutdown
Mode), V
DCIN
= V
DCDIV
= 0V (Backup Mode)
I
CHGFET
, I
DCHFET
= 1µA
100 mV
t
R
t
F
CHGFET, DCHFET Transition Times
Rise Time
Fall Time
C
LOAD
= 1.6nF, 20% to 80%
C
LOAD
= 1.6nF, 20% to 80%
35
15
65
65
ns
ns
F
PWM
PWM Oscillator Switching Frequency
l
255 300 340 kHz
SafetySignal Decoder and Thermistor Interface
SS
OR
SafetySignal Decoder
SafetySignal Trip
(RES_COLD/RES_OR)
R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6) R
THB
= 54.9k ±1%.
Smart Batteries and Li-Ion Only
l
95 100 105 k
SS
CLD
SafetySignal Decoder
SafetySignal Trip
(RES_IDEAL/RES_COLD)
R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6) R
THB
= 54.9k ±1%
Smart Batteries and Li-Ion Only
l
28.5 30 31.5 k
SS
IDL
SafetySignal Decoder
SafetySignal Trip
(RES_HOT/RES_IDEAL)
R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6) R
THB
= 54.9k ±1%
Smart Batteries and Li-Ion Only
l
2.85 3 3.15 k
SS
HOT
SafetySignal Decoder
SafetySignal Trip
(RES_UR/RES_HOT)
R
THA
= 1130Ω ±1%, C
TH
= 1nF (Note 6) R
THB
= 54.9k ±1%
Smart Batteries and Li-Ion Only
l
425 500 575 Ω
V
HOT
THB Pin Hot Threshold Voltage V
THB
Decreasing; Lead Acid Only
l
0.28 •
V
THA
0.30 •
V
THA
0.36 •
V
THA
V
V
HOTH
THB Pin Hot Threshold Hysteresis Voltage V
THB
Increasing; Lead Acid Only 50 mV
V
REM
THB Pin Battery Removal Threshold Voltage V
THB
Increasing; Lead Acid Only
l
0.90 •
V
THA
0.94 •
V
THA
0.96 •
V
THA
V