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PDF ISL9519C Data sheet ( Hoja de datos )
| Número de pieza | ISL9519C | |
| Descripción | Narrow VDC Regulator/Charger | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Narrow VDC Regulator/Charger with SMBus Interface
and Internal Switching FETs
ISL9519C
The ISL9519C is a highly integrated Narrow VDC system voltage
regulator and battery charger controller. Operating parameters
are programmable over the System Management Bus (SMBus).
The ISL9519C is designed for applications where the system
power source is either the battery pack or the output of the
regulator/charger. This makes the max voltage to the system
equal to the max battery voltage instead of the max adapter
voltage. The ISL9519C also includes a patented system to
control trickle charging deeply discharged batteries while
maintaining system voltage at a user defined minimum. High
efficiency is achieved with a DC/DC synchronous-rectifier buck
converter, equipped with diode emulation and variable
switching frequency for enhanced light load efficiency and
AC-adapter boosting prevention. The ISL9519C can charge one,
two or three series connected Lithium-ion cells, at up to 8A
charge current. Default settings for 1-, 2- or 3-cell operation at
power-up are selected by an external pin. Integrated MOSFETs,
drivers and bootstrap diode result in fewer components and
smaller implementation area. Low offset current-sense
amplifiers provide high accuracy.
The ISL9519C provides an open drain digital output that
indicates the presence of the AC-adapter. The ISL9519C also
provides an analog output that indicates the adapter current.
Applications
• Notebook Computers
• Tablet PCs
• Portable Equipment with Rechargeable Batteries
Features
• ±0.5% System Voltage Accuracy (-10°C to +100°C)
• ±3% Accurate Input Current Limit
• ±3% Accurate Battery Charge Current Limit
• Variable Switching Frequency at Light Load Conditions for
Higher Efficiency
• Fixed Frequency Operation at Higher Loads
- Fixed Frequency Mode can be Forced by an External Pin
• Trickle Charge System for Deeply Discharged Batteries
- Automatic Trickle Charge Current (256mA)
- Holds Minimum Voltage to System
• SMBus 2-Wire Serial Interface
• Default System Voltage Values for 1-Cell, 2-Cell or
3-Cell Operation Selected by an External Pin
• Adapter In-rush FET Control
• Adapter Isolation FET Control
• Battery Short Circuit Protection
• Fast System-Load Transient Response
• Monitor Outputs
- Adapter Current (2.5% Accuracy)
- AC-adapter Present Indicator
• 11-Bit Max System Voltage Setting
• 7-Bit Min System Voltage Setting
• 6-Bit Charge Current Setting
- Over 8A Battery Charger Current
• 6-Bit Adapter Current Setting
- Over 8A Adapter Current
• +4.5V to +22V Adapter Voltage Range
• Pb-Free (RoHS Compliant)
100
95
90
85
80
75
70
0
3 CELL (12.6V) 2 CELL (8.4V)
1 CELL (4.2V)
2 CELL (6V)
1 CELL (3V)
12345678
SYSTEM LOAD (A)
FIGURE 1. EFFICIENCY
8
7 1 CELL (4.2V)
6
3 CELL (12.6V)
5
2 CELL (8.4V)
4
2 CELL (6V)
3
1 CELL (3V)
2
1
0
25 45 65 85 105 125
MAX AMBIENT TEMPERATURE (°C)
FIGURE 2. MAX LOAD CURRENT vs AMBIENT TEMPERATURE WITH
1M/s FORCED AIR COOLING
June 30, 2011
FN7823.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
VSMB
SDA
SCL
CELL
VFSW
RST#
AMON
CSIP
CSIN
ICOMP
CSOP
CSON
VFB
VCOMP
ISL9519C
DCIN
VDD
SMBus
CHARGE CURRENT
ADAPTER CURRENT
MAXSYSTEMVOLTAGE
MINSYSTEMVOLTAGE
6
6
11
7
DISCONNECT ADAPTER
SGATE ON
VFSW
LOW POWER
AC_OK
TRICKLE
CC DAC
AC DAC
MAXSVDAC
MINSVDAC
LINEAR
REGULATOR
DISCONNECT ADAPTER
AC_OK
ISL9519C
VREF
+
-
+
20X
-
+
-
AC DAC
-
GM3
+
IMIN
0.1V
+
-
SGATE ON
VFSW EN
+
20X
-
CC DAC
TRICKLE
-
GM1
+
500k
MAXSVDAC
+
GM2
-
VMIN
DC/DC
CONVERTER
LOW FREQ
AT
LIGHT LOAD
100k
MINSVDAC
CSON
-
GM4
+
AGND
FIGURE 3. FUNCTIONAL BLOCK DIAGRAM
TRICKLE
AGATE
ACOK
ADET
SGATE
BOOT
UGATE
VIN
PHASE
VDDP
PGND
BGATE
5 FN7823.0
June 30, 2011
5 Page 
ISL9519C
SMB Timing Specification VSMB = 2.7V to 5.5V. (Continued)
PARAMETERS
SYMBOL
CONDITIONS
MIN MAX
(Note 8) TYP (Note 8) UNITS
Start Condition Hold Time from SCL
Start Condition Set-up Time from SCL
Stop Condition Set-up Time from SCL
SDA Hold Time from SCL
SDA Set-up Time from SCL
SCL Low Period
SCL High Period
SMBus Inactivity Time-out
tHD:STA
4
tSU:STA
4.7
tSU:STO
4
tHD:DAT
300
tSU:DAT
250
tLOW
4.7
tHIGH
4
Maximum Charging Period Without a SMBus
120 180 250
Write to MaxSystemVoltage or ChargeCurrent
Register
µs
µs
µs
ns
ns
µs
µs
s
NOTES:
7. Limits should be considered typical and are not production tested.
8. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
Typical Operating Performance DCIN = 20V, 2S2P Li-Battery, TA = +25°C, unless otherwise noted.
9
SMBUS COMMANDS:
Max System Voltage = 8.4V
WHEN BATTERY VOLTAGE EXCEEDS MIN SYSTEM VOLTAGE
Min System Voltage = 5.376V
CHARGE CURRENT INCREASES
8 Charge Current = 3.584A
TO FAST CHARGE
4.5
4.0
7
SYSTEM VOLTAGE = MINSYSTEM VOLTAGE
IN TRICKLE CHARGE MODE
6
3.5
3.0
5 V BATTERY
RAMPS UP FROM ZERO
TO MAXSYSTEMVOLTAGE
4
BGATE IN THE LINEAR MODE
FOR TRICKLE CHARGE
3
2.5
2.0
1.5
2
1
0
0
TRICKLE CHARGE
CURRENT
THE BGATE FET IS
FULLY ENHANCED
IN FAST CHARGE MODE
1.0
0.5
1 2345
67
BATTERY VOLTAGE (V)
FIGURE 6. CHARGE CURRENT AND SYSTEM VOLTAGE vs BATTERY VOLTAGE
0
89
11 FN7823.0
June 30, 2011
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ISL9519C.PDF ] | |
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