Rainbow Electronics MAX8730 User Manual
MAX8730
Low-Cost Battery Charger
________________________________________________________________ Maxim Integrated Products 1
19-3885; Rev 0; 12/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
General Description
The MAX8730 highly integrated, multichemistry, batterycharger control IC simplifies construction of accurate
and efficient chargers. The MAX8730 operates at high
switching frequency to minimize external component
size and cost. The MAX8730 uses analog inputs to control charge current and voltage, and can be programmed by a microcontroller or hardwired.
The MAX8730 reduces charge current to give priority to
the system load, effectively limiting the adapter current
and reducing the adapter current requirements.
The MAX8730 provides a digital output that indicates
the presence of an AC adapter, and an analog output
that monitors the current drawn from the AC adapter.
Based on the presence and absence of the AC
adapter, the MAX8730 automatically selects the appropriate source for supplying power to the system by controlling two external switches. Under system control, the
MAX8730 allows the battery to undergo a relearning
cycle in which the battery is completely discharged
through the system load and then recharged.
An analog output indicates adapter current or batterydischarge current. The MAX8730 provides a low-quiescent-current linear regulator, which may be used when
the adapter is absent, or disabled for reduced current
consumption
The MAX8730 is available in a small, 5mm x 5mm, 28pin, thin (0.8mm) QFN package. An evaluation kit is
available to reduce design time. The MAX8730 is
available in a lead-free package.
Applications
Notebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
Features
♦ Small Inductor (3.5µH)
♦ Programmable Charge Current > 4.5A
♦ Automatic Power-Source Selection
♦ Analog Inputs Control Charge Current and
Charge Voltage
♦ Monitor Outputs for
AC Adapter Current
Battery-Discharge Current
AC Adapter Presence
♦ Independent 3.3V 20mA Linear Regulator
♦ Up to 17.6V (max) Battery Voltage
♦ +8V to +28V Input Voltage Range
♦ Reverse Adapter Protection
♦ System Short-Circuit Protection
♦ Cycle-by-Cycle Current Limit
Ordering Information
PART
TEMP
RANGE
PINPACKAGE
PKG
CODE
MAX8730ETI+
28 Thin QFN
(5mm x 5mm)
T2855-5
+Denotes lead-free package.
Pin Configuration appears at end of data sheet.
MAX8730
ADAPTER
INPUT
PDS
SRC
ASNS
ACIN
ACOK
VCTL
LDO
CLS
ICTL
MODE
REFON
INPON
LDO
RELTH
REF
SWREF
BATT
CSIN
CSIP
DHI
PDL
DHIV
IINP CCV
CCI
CCS
CSSP CSSN
GND
REF
HOST
SYSTEM
LOAD
BATTERY
Typical Operating Circuit
-40°C to +85°C
MAX8730
Low-Cost Battery Charger
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CSSP, SRC, ACOK, ASNS, DHIV, BATT,
CSIP to GND.......................................................-0.3V to +30V
CSIP to CSIN or CSSP to CSSN ............................-0.3V to +0.3V
DHIV to SRC .................................................-6V to (SRC + 0.3V)
DHI to DHIV ...............................................-0.3V to (SRC + 0.3V)
PDL, PDS to GND ........................................-0.3V to (SRC + 0.3)
CCI, CCS, CCV, IINP, SWREF, REF,
MODE, ACIN to GND.............................-0.3V to (LDO + 0.3V)
RELTH, VCTL, ICTL, REFON, CLS, LDO,
INPON to GND .....................................................-0.3V to +6V
LDO Short-Circuit Current...................................................50mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TQFN (derate 20.8mW/°C above +70°C) .......1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ............................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CHARGE-VOLTAGE REGULATION
VCTL Range 0 3.6 V
Not including resistor
tolerances
V
VCTL
= 3.6V
or 0V
Including 1% resistor
tolerances
Battery-Regulation Voltage
Accuracy
V
VCTL
= V
LDO
(3 or 4 cells)
%
V
VCTL
Default Threshold V
VCTL
rising 4.4 V
V
VCTL
= 3V
0 4
VCTL Input Bias Current
SRC = BATT, ASNS = GND INPON =
REFON = 0, V
VCTL
= 5V
0 16
µA
CHARGE-CURRENT REGULATION
ICTL Range 0 3.6 V
mV
V
ICTL
= 3.6V
-5 +5 %
75
mV
Full-Charge-Current Accuracy
(CSIP to CSIN)
V
I
CTL
= 2.0V
-5 +5 %
Trickle-Charge-Current Accuracy
V
ICTL
= 120mV 2.5 4.5 7.5 mV
Charge-Current Gain Error Based on V
ICTL
= 3.6V and V
ICTL
= 0.12V
%
Charge-Current Offset Error Based on V
ICTL
= 3.6V and V
ICTL
= 0.12V -2 +2 mV
BATT/CSIP/CSIN Input Voltage
Range
0 19 V
Charging enabled
600
CSIP/CSIN Input Current
Charging disabled, SRC = BATT,
ASNS = GND or V
ICTL
= 0V
8 16
µA
-1.0
-1.05
-0.5
128.25 135 141.75
71.25
-1.9
300
+1.0
+1.05
+0.5
78.75
+1.9
MAX8730
Low-Cost Battery Charger
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
PARAMETER
CONDITIONS
UNITS
ICTL falling 50 65 80
ICTL Power-Down Mode
Threshold
ICTL rising 70 90 110
mV
V
ICTL
= 3V -1 +1
ICTL Input Bias Current
SRC = BATT, ASNS = GND, V
ICTL
= 5V
-1 +1
µA
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
mV
mV
V
CLS
= REF (trim point)
-4 +4 %
50 53 56 mV
V
CLS
= REF x 0.7
%
36 38
mV
Input Current-Limit Accuracy
V
CLS
= REF x 0.5
%
CSSP/CSSN Input Voltage Range
8.0 28 V
V
CSSP
= V
CSSN
= V
SRC
> 8.0V
800
CSSP/CSSN Input Current
V
SRC
= 0V 0.1 1
µA
CLS Input Range 1.1
V
CLS Input Bias Current V
CLS
= 2.0V -1 +1 µA
IINP Transconductance V
CSSP
- V
CSSN
= 56mV
2.8
µA/mV
V
CSSP
- V
CSSN
= 100mV, V
IINP
= 0 to 4.5V -5 +5
V
CSSP
- V
CSSN
= 75mV -8 +8
V
CSSP
- V
CSSN
= 56mV -5 +5
IINP Accuracy
V
CSSP
- V
CSSN
= 20mV
%
IINP Gain Error Based on V
IC T L =
RE F x 0.5 and V
IC T L
= RE F -7 +7 %
IINP Offset Error Based on V
IC T L =
RE F x 0.5 and V
IC T L
= RE F -2 +2 mV
IINP Fault threshold IINP rising 4.1 4.2 4.3 V
SUPPLY AND LINEAR REGULATOR
SRC Input Voltage Range 8.0 28 V
SRC falling 7 7.4
SRC Undervoltage Lockout
Threshold
SRC rising 7.5 8
V
SYMBOL
MIN TYP MAX
72.75 75.75 78.75
72.75 75.75 78.75
-5.6
-6.6
2.66
-12.5
+5.6
40.5
+6.6
400
REF
2.94
+12.5
MAX8730
Low-Cost Battery Charger
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Normal mode 4 6 mA
10 20
V
INPON = low,
V
REFON
= high
600
V
INPON = high,
V
REFON
= low
600
SRC Quiescent Current
(INPON/REFON = Don’t Care)
V
SRC
= V
BATT =
12V, ASNS =
GND
(Note 2)
600
µA
V
BATT
= 16.8V, V
SRC
= 19V, ICTL = 0 8 16
BATT Input Current
V
BATT
= 2V to 19V, V
SRC
> V
BATT
+ 0.3V
600
µA
I
CSIP
+ I
CSIN
+ I
BATT
, ASNS = GND 2 5
600
Battery-Leakage Current
I
CSIP
+ I
CSIN
+ I
BATT
+
I
CSSP
+ I
CSSN
+ I
SRC
,
ASNS = REFON = GND
2 5
µA
LDO Output Voltage 8.0V < V
SRC
< 28V, no load 5.2
5.5 V
LDO Load Regulation 0 < I
LDO
< 10mA 20 50 mV
LDO Undervoltage Lockout
Threshold
V
SRC
= 8.0V 4 V
REFERENCES
REF Output Voltage Ref
V
REF Undervoltage Lockout
Threshold
REF falling 3.1 3.9 V
SWREF Output Voltage 8.0V < V
SRC
< 28V, no load
3.3
V
SWREF Load Regulation 0.1mA < I
SWREF
< 20mA
20 50 mV
TRIP POINTS
ACIN Threshold ACIN rising
2.1
V
ACIN Threshold Hysteresis 60 mV
ACIN Input Bias Current V
ACIN
= 2.048V -1 +1 µA
SWITCHING REGULATOR
DHI Off-Time V
BATT
= 16.0V
400 ns
DHI Off-Time K Factor V
BATT
= 16.0V 4.8 5.6 6.4
V x µs
Sense Voltage for Minimum
Discontinuous Mode Ripple
Current
V
CSIP
- V
CSIN
7 mV
Cycle-by-Cycle Current-Limit
Sense Voltage
240 mV
Charge Disable Threshold V
SRC
- V
BATT
, SRC falling 40 60 80 mV
DHIV Output Voltage With respect to SRC
-5.5 V
DHIV Sink Current 10 mA
V
INPON =VREFON
= low
300
300
V
INPON = VREFON
V
INPON = GND
= high
= 5.4V
REFON
4.18 4.20 4.22
3.234
2.037
300 350
160 200
-4.3 -4.8
350
300
300
5.35
3.366
2.163
MAX8730
Low-Cost Battery Charger
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DHI Resistance Low I
DHI
= -10mA 2 4 Ω
DHI Resistance High I
DHI
= 10mA 1 2 Ω
ERROR AMPLIFIERS
V C TL = 3.6V , V
BAT T
= 16.8V , M OD E = LD O
GMV Loop Transconductance
mA/V
GMI Loop Transconductance ICTL = 3.6V, V
CSSP
- V
CSIN
= 75mV 0.5 1 2
mA/V
GMS Loop Transconductance V
CLS
= 2.048V, V
CSSP
- V
CSSN
= 75mV 0.5 1 2
mA/V
CCI/CCS/CCV Clamp Voltage
1.1V < V
CCV
< 3.0V,
1.1V < V
CCI
< 3.0V,
1.1V < V
CCS
< 3.0V
600 mV
LOGIC LEVELS
MODE, REFON Input Low Voltage
0.5 V
MODE Input Middle Voltage 1.9
3.3 V
M OD E , RE FON Inp ut H i g h V ol tag e
3.4 V
MODE, REFON, INPON Input
Bias Current
MODE = 0 or 3.6V -2 +2 µA
V
INPON
rising
V
INPON Threshold
V
INPON
falling 0.8 V
ADAPTER DETECTION
ACOK Voltage Range 0 28 V
ACOK Sink Current V
ACOK
= 0.4V, ACIN = 1.5V 1 mA
ACOK Leakage Current V
ACOK
= 28V, ACIN = 2.5V 1 µA
BATTERY DETECTION
BATT Overvoltage Threshold
V
VCTL
= V
LDO
, BATT
rising; result with respect
to battery-set voltage
mV
BATT Overvoltage Hysteresis
mV
RELTH Operating Voltage Range
0.9 2.6 V
RELTH Input Bias Current V
RELTH
= 0.9V to 2.6V
-50 +50 nA
V
RELTH
= 0.9V
4.5
BATT Minimum Voltage Trip
Threshold
V
BATT
falling
V
RELTH
= 2.6V
V
PDS, PDL SWITCH CONTROL
Adapter-Absence Detect
Threshold
V
ASNS
- V
BATT
, V
ASNS
falling
mV
Adapter-Detect Threshold V
ASNS
- V
BATT
-60 mV
PDS Output Low Voltage Result with respect to SRC, I
PDS
= 0 -8 -10 -12 V
PDS/PDL Output High Voltage Result with respect to SRC, I
PD_
= 0
-0.5 V
PDS/PDL Turn-Off Current V
PDS
= V
SRC
- 2V, V
SRC
= 16V 6 12 mA
0.0625 0.125 0.250
V C TL = 3.6V , V
= 12.6V , M OD E = FLOAT 0.0833 0.167 0.333
BAT T
150 300
2.65
2.2
V
MODE
V
MODE
= V
= FLOAT
LDO
+140
+100
100
4.42
12.77 13.0 13.23
-300 -280 -240
-140 -100
-0.2
4.58
MAX8730
Low-Cost Battery Charger
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER
CONDITIONS
UNITS
PDS Turn-On Current PDS = SRC 6 12 mA
PDL Turn-On Resistance PDL = GND 50
200 kΩ
PDS/PDL Delay Time 5.0 µs
SYMBOL
CHARGE-VOLTAGE REGULATION
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VCTL Range 0 3.6 V
Battery-Regulation-Voltage
Accuracy
V
Default Threshold V
VCTL
VCTL Input Bias Current
CHARGE-CURRENT REGULATION
ICTL Range 0 3.6 V
Full-Charge-Current Accuracy
(CSIP to CSIN)
Trickle-Charge-Current Accuracy V
Charge-Current Gain Error Based on V
Charge-Current Offset Error Based on V
BATT/CSIP/CSIN Input Voltage
Range
CSIP/CSIN Input Current
ICTL Power-Down Mode
Threshold
V
= 3.6V
VCTL
or 0V
V
= V
VCTL
rising 4.4 V
VCTL
SRC = BATT, ASNS = GND INPON =
REFON = 0, V
V
= 3.6V
ICTL
V
= 2.0V
ICTL
= 120mV 2 10 mV
ICTL
0 19 V
Charging enabled 1000
Charging disabled, SRC = BATT,
ASNS = GND, or V
ICTL falling 50 80
ICTL rising 70 110
MIN TYP MAX
100
Not including resistor
tolerances
Including 1% resistor
tolerances
(3 or 4 cells) -0.8 +0.8
LDO
VCTL
-1.2 +1.2
-1.25
= 5V
0 16 µA
128.25 141.75 mV
-5 +5 %
70 80 mV
-6.7 +6.7 %
= 3.6V and V
ICTL
= 3.6V and V
ICTL
ICTL
= 0V
= 0.12V -1.9 +1.9 %
ICTL
= 0.12V -2 +2 mV
ICTL
16
+1.25
%
µA
mV
MAX8730
Low-Cost Battery Charger
_______________________________________________________________________________________ 7
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT-CURRENT REGULATION
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
mV
V
CLS
= REF (trim point)
mV
V
CLS
= REF x 0.7
mVInput Current-Limit Accuracy
V
CLS
= REF x 0.5
mV
CSSP/CSSN Input Voltage Range
8.0 28 V
CSSP/CSSN Input Current V
CSSP
= V
CSSN
= V
SRC
> 8.0V
µA
CLS Input Range 1.1
V
IINP Transconductance V
CSSP
- V
CSSN
= 56mV
µA/mV
V
CSSP
- V
CSSN
= 100mV, V
IINP
= 0 to 4.5V
-5 +5
V
CSSP
- V
CSSN
= 75mV -8 +8
V
CSSP
- V
CSSN
= 56mV -5 +5
IINP Accuracy
V
CSSP
- V
CSSN
= 20mV
%
IINP Gain Error
-7 +7 %
IINP Offset Error
-2 +2 mV
IINP Fault Threshold IINP rising 4.1 4.3 V
SUPPLY AND LINEAR REGULATOR
SRC Input Voltage Range 8.0 28 V
SRC falling 7
SRC Undervoltage Lockout
Threshold
SRC rising 8
V
Normal mode 6 mA
20
V
INPON = low,
V
REFON
= high
600
V
INPON = high,
V
REFON
= low
600
SRC Quiescent Current
(INPON/REFON = Don’t Care)
SRC
= V
BATT =
12V, ASNS =
GND
(Note 2)
600
µA
BATT Input Current
600 µA
600
Battery Leakage Current
I
CSIP
+ I
CSIN
+ I
BATT
+ I
CSSP
+ I
CSSN
+ I
SRC
,
ASNS = REFON = GND
16
µA
LDO Output Voltage 8.0V < VSRC < 28V, no load 5.2 5.5 V
LDO Load Regulation 0 < I
LDO
< 10mA 50 mV
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= -40°C to +85°C, unless otherwise noted.)
Based on V
Based on V
RE F x 0.5 and V
I C T L =
RE F x 0.5 and V
I C T L =
= RE F
I C T L
= RE F
I C T L
72.75
72.75
36.00
50.0
2.66
-12.5
78.25
78.25
56.0
40.50
1000
REF
2.94
+12.5
V
INPON = VREFON
= low
V
INPON = VREFON
V
= 2V to 19V, V
BATT
SRC
> V
V
INPON = GND
BATT
REFON
= high
+ 0.3V
= 5.4V
MAX8730
Low-Cost Battery Charger
8 _______________________________________________________________________________________
PARAMETER
CONDITIONS
UNITS
REFERENCES
REF Output Voltage Ref 0 < I
REF
< 500µA
V
REF Undervoltage Lockout
Threshold
REF falling 3.9 V
SWREF Output Voltage 8.0V < V
SRC
< 28V, no load
V
SWREF Load Regulation 0.1mA < I
SWREF
< 20mA 50 mV
TRIP POINTS
ACIN Threshold ACIN rising
V
SWITCHING REGULATOR
DHI Off-Time V
BATT
= 16.0V 300 400 ns
DHI Off-Time K Factor V
BATT
= 16.0V 4.8 6.4
V x µs
Cycle-by-Cycle Current-Limit
Sense Voltage
160 240 mV
DHIV Output Volatge With respect to SRC
V
DHIV Sink Current 10 mA
DHI Resistance Low I
DHI
= -10mA 4 Ω
DHI Resistance High I
DHI
= 10mA 2 Ω
ERROR AMPLIFIERS
V C TL = 3.6V , V
BAT T
= 16.8V , M OD E = LD O
GMV Loop Transconductance
mA/V
GMI Loop Transconductance ICTL = 3.6V, V
CSSP
- V
CSIN
= 75mV 0.5 2
mA/V
GMS Loop Transconductance V
CLS
= 2.048V, V
CSSP
- V
CSSN
= 75mV 0.5 2
mA/V
CCI/CCS/CCV Clamp Voltage
1.1V < V
CCV
< 3.0V, 1.1V < V
CCI
< 3.0V,
1.1V < V
CCS
< 3.0V
150 600 mV
LOGIC LEVELS
M OD E , RE FON Inp ut Low V ol tag e 0.5 V
MODE Input Middle Voltage 1.9 3.3 V
M OD E , RE FON Inp ut H i g h V ol tag e
3.4 V
V
INPON
rising
INPON Threshold
V
INPON
falling 0.8
V
ADAPTER DETECTION
ACOK Voltage Range 0 28 V
ACOK Sink Current V
ACOK
= 0.4V, ACIN = 1.5V 1 mA
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= -40°C to +85°C, unless otherwise noted.)
SYMBOL
MIN TYP MAX
4.16
3.224
2.037
V C TL = 3.6V , V
-4.3
0.0625
= 12.6V , M OD E = FLOAT 0.0833
BAT T
2.2
4.24
3.376
2.163
-5.5
0.250
0.333
MAX8730
Low-Cost Battery Charger
_______________________________________________________________________________________ 9
Note 1: Accuracy does not include errors due to external-resistance tolerances.
Note 2: In this mode, SRC current is drawn from the battery.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BATTERY DETECTION
RELTH Operating Voltage Range
0.9 2.6 V
BATT Minimum Voltage Trip
Threshold
V
BATT
falling
V
PDS, PDL SWITCH CONTROL
Adapter-Absence-Detect
Threshold
V
ASNS
- V
BATT
, V
ASNS
falling
mV
Adapter-Detect Threshold V
ASNS
- V
BATT
-60 mV
PDS Output Low Voltage Result with respect to SRC, I
PDS
= 0 -7 -12 V
PDS/PDL Output High Voltage Result with respect to SRC, I
PD_
= 0
V
PDS/ PDL Turn-Off Current V
PDS
= V
SRC
- 2V, V
SRC
= 16V 6 mA
PDS Turn-On Current PDS = SRC 6 mA
PDL Turn-On Resistance PDL = GND 50
200 kΩ
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= -40°C to +85°C, unless otherwise noted.)
V
RELTH
V
RELTH
= 0.9V
= 2.6V
4.42
12.77
-310
-140
4.58
13.23
-240
-0.5
100
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