|
|
PDF MAX8730 Data sheet ( Hoja de datos )
| Número de pieza | MAX8730 | |
| Descripción | Low-Cost Battery Charger | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX8730 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
|
No Preview Available !
19-3885; Rev 0; 12/05
EVAALVUAAILTAIOBNLEKIT
Low-Cost Battery Charger
General Description
Features
The MAX8730 highly integrated, multichemistry, battery- ♦ Small Inductor (3.5µH)
charger 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 con-
trol charge current and voltage, and can be pro-
grammed by a microcontroller or hardwired.
The MAX8730 reduces charge current to give priority to
the system load, effectively limiting the adapter current
♦ 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
and reducing the adapter current requirements.
♦ Independent 3.3V 20mA Linear Regulator
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 appro-
♦ Up to 17.6V (max) Battery Voltage
♦ +8V to +28V Input Voltage Range
♦ Reverse Adapter Protection
♦ System Short-Circuit Protection
priate source for supplying power to the system by con- ♦ Cycle-by-Cycle Current Limit
trolling two external switches. Under system control, the
MAX8730 allows the battery to undergo a relearning
cycle in which the battery is completely discharged
Ordering Information
through the system load and then recharged.
An analog output indicates adapter current or battery-
PART
TEMP
RANGE
PIN-
PACKAGE
PKG
CODE
discharge current. The MAX8730 provides a low-quies-
28 Thin QFN
cent-current linear regulator, which may be used whwewnw.DataSheet4MU.cAomX8730ETI+ -40°C to +85°C (5mm x 5mm) T2855-5
the adapter is absent, or disabled for reduced current
consumption
+Denotes lead-free package.
The MAX8730 is available in a small, 5mm x 5mm, 28-
pin, thin (0.8mm) QFN package. An evaluation kit is
available to reduce design time. The MAX8730 is
available in a lead-free package.
Typical Operating Circuit
Applications
ADAPTER
INPUT
SYSTEM
LOAD
Notebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
CSSP
PDS
SRC
ASNS
CSSN
DHIV
PDL
DHI
Pin Configuration appears at end of data sheet.
LDO
REF
HOST
MAX8730
ACIN
ACOK
VCTL
CLS
MODE
ICTL
REFON
INPON
IINP
CCI
CSIP
CSIN
BATT
SWREF
REF
RELTH
LDO
CCV
CCS GND
BATTERY
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Low-Cost Battery Charger
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. VSRC = VASNS = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DHI Resistance Low
DHI Resistance High
ERROR AMPLIFIERS
GMV Loop Transconductance
GMI Loop Transconductance
GMS Loop Transconductance
IDHI = -10mA
IDHI = 10mA
24Ω
12Ω
VCTL = 3.6V, VBATT = 16.8V, MODE = LDO
VCTL = 3.6V, VBATT = 12.6V, MODE = FLOAT
ICTL = 3.6V, VCSSP - VCSIN = 75mV
VCLS = 2.048V, VCSSP - VCSSN = 75mV
0.0625
0.0833
0.5
0.5
0.125
0.167
1
1
0.250
0.333
2
2
mA/V
mA/V
mA/V
CCI/CCS/CCV Clamp Voltage
1.1V < VCCV < 3.0V,
1.1V < VCCI < 3.0V,
1.1V < VCCS < 3.0V
150 300 600
mV
LOGIC LEVELS
MODE, REFON Input Low Voltage
0.5 V
MODE Input Middle Voltage
1.9 2.65 3.3
V
MODE, REFON Input High Voltage
3.4 V
MODE, REFON, INPON Input
Bias Current
MODE = 0 or 3.6V
-2 +2 µA
INPON Threshold
ADAPTER DETECTION
VINPON rising
VINPON falling
2.2 V
0.8 V
ACOK Voltage Range
ACOK Sink Current
ACOK Leakage Current
BATTERY DETECTION
VACOK = 0.4V, ACIN = 1.5V
VACOK = 28V, ACIN = 2.5V
0 28 V
1 mA
1 µA
BATT Overvoltage Threshold
VVCTL = VLDO , BATT
VMODE = VLDO
rising; result with respect
to battery-set voltage
VMODE = FLOAT
+140
+100
mV
BATT Overvoltage Hysteresis
100 mV
RELTH Operating Voltage Range
0.9 2.6 V
RELTH Input Bias Current
BATT Minimum Voltage Trip
Threshold
PDS, PDL SWITCH CONTROL
VRELTH = 0.9V to 2.6V
VBATT falling
VRELTH = 0.9V
VRELTH = 2.6V
-50 +50
4.42 4.5 4.58
12.77 13.0 13.23
nA
V
Adapter-Absence Detect
Threshold
VASNS - VBATT, VASNS falling
-300 -280 -240
mV
Adapter-Detect Threshold
PDS Output Low Voltage
PDS/PDL Output High Voltage
PDS/PDL Turn-Off Current
VASNS - VBATT
Result with respect to SRC, IPDS = 0
Result with respect to SRC, IPD_ = 0
VPDS = VSRC - 2V, VSRC = 16V
-140
-8
6
-100
-10
-0.2
12
-60
-12
-0.5
mV
V
V
mA
_______________________________________________________________________________________ 5
5 Page 
Low-Cost Battery Charger
Typical Operating Characteristics (continued)
(Circuit of Figure 1, adapter = 19.5V, VBATT = 12V, VICTL = 2.4V, MODE > 1.8V, REFON = INPON = LDO, VRELTH = VREF/2, TA =
+25°C, unless otherwise noted.)
OUTPUT RIPPLE VOLTAGE
vs. BATTERY VOLTAGE
0.18
SWITCHING FREQUENCY
vs. BATTERY VOLTAGE
1000
0.15
800
0.12
0.09 600
0.06
400
0.03
0
0 5 10 15 20
BATTERY VOLTAGE (V)
200
0
3 6 9 12 15
BATTERY VOLTAGE (V)
18
BATTERY REMOVAL
MAX8730toc12
CHARGE
CURRENT = 12V
COUT = 4.7µF
COUT = 10µF
13V
12.5V
4µs/div
ADAPTER
PDS
PDL
SYSTEM
LOAD
ADAPTER INSERTION
MAX8730toc13
ADAPTER
INSERTION
20V
0V
20V
0V
20V
0V
100µs/div
20V
0V
ADAPTER
PDS
PDL
SYSTEM
LOAD
ADAPTER REMOVAL
MAX8730toc14
BATTERY
VOLTAGE = 16.8V
20V
0V
20V
0V
20V
0V
4ms/div
20V
0V
LOAD
CURRENT
ADAPTER
CURRENT
INDUCTOR
CURRENT
COMPENSATION
SYSTEM LOAD TRANSIENT
MAX8730toc15
CCS
CCI
CCI
CCS
200µs/div
5A
0A
5A
0A
5A
0A
500mV/div
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet MAX8730.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX873 | Low-Power / Low-Drift / +2.5V/+5V/+10V Precision Voltage References |  Maxim Integrated |
| MAX8730 | Low-Cost Battery Charger | Maxim Integrated Products |
| MAX8731 | SMBus Level 2 Battery Charger | Maxim Integrated Products |
| MAX8731A | SMBus Level 2 Battery Charger | Maxim Integrated Products |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |