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SC1766CS14 PDF даташит

Спецификация SC1766CS14 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «BATTERY CHARGE CONTROLLER».

Детали детали

Номер произв SC1766CS14
Описание BATTERY CHARGE CONTROLLER
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1766CS14 Даташит, Описание, Даташиты
BATTERY
CHARGE CONTROLLER
SC1766
Janaury 30, 1998
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1766 fast charge controller IC is designed for
intelligent charging of NiMH or NiCd batteries without
overcharging. It detects a voltage drop (-V) occurring
in the final stage of a fast charging cycle and
correspondingly controls the charging current. Fast
charge can also be cut off by a peak voltage timer
(0V).
The detection of -V is a very reliable method to
terminate fast charging for NiMH and NiCd batteries.
The SC1766 uses -V detection as one of the primary
decisions for fast charge cut-off. The -V value of the
SC1766 is as small as 4mV per cell, particularly
suitable for NiMH as well as NiCd batteries. The peak
voltage timer is particularly useful when the voltage
drop at the end of charge for some batteries, e.g.
NiMH cells, is not pronounced enough for reliable
detection. An adjustable safety timer (3 settings) is
used as a backup termination method. Provisions are
made with the SC1766 to prevent fast charge under
temperature fault conditions. Two LED outputs are
used to indicate the charging status. Another flash LED
output can be used alone to indicate charge status.
AC mode allows the battery to drive its loads while
being charged. Test mode is provided to dramatically
reduce production test time.
FEATURES
Reliable fast charge control of NiMH/NiCd
batteries
Fast charge termination by:
1 Accurate -V detection level -0.25% with
respect to peak value
2 Peak voltage timer (0V)
Adjustable fast charge safety timer
Protection against temperature fault
Protection against short-circuited and open
batteries
Wide operation voltage range of 9V to 18V, no
extra regulator needed
Large battery voltage detection range of 0.65V to
3.7V
LED drivers to indicate charge status or fault
conditions
Voltage reference output
Quick and easy testing for production
Space saving 8-pin and 14-pin SO packages
ORDERING INFORMATION
DEVICE(1)
PACKAGE
SC1766CS08
SO-8
SC1766CS14
SO-14
Note:
(1) Add suffix ‘TR’ for tape and reel.
APPLICATIONS
Battery chargers for:
Mobile phones
Notebook and laptop personal computers
Portable power tools and toys
Portable communications equipment
Portable video and stereo equipment
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum
Supply Voltage
DC Voltage Applied
to any Pin
VCC
18
18
Sink Current of VOUT
pin, LED pin, and
FLASH pin
20
Operating
Temperature Range
TA
0 to 70
Storage
Temperature Range
TSTG
-65 to 150
Units
V
V
mA
°C
°C
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320









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SC1766CS14 Даташит, Описание, Даташиты
BATTERY
CHARGE CONTROLLER
SC1766
Janaury 30, 1998
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, TA = 25ºC, VIN = 12.5V
Parameter
Supply Voltage
Supply Current
-V detection level w.r.t. peak value
Voltage protection limits
battery low
battery high
Input impedance of TIMER pin
Input impedance of MODE pin
Output resistance of LED pin
fast charge
trickle charge
Symbol
VDD
IDD
VBT
ZTIMER
ZMODE
RLED
Output resistance of VOUT pin
fast charge
trickle charge
RVOUT
FLASH pin output
resistance at fast charge
frequency
duty cycle
Reference voltage
source current
Temperature fault voltage limits as
fraction of VREF
under-temperature
over-temperature
RFLASH
VREF
αNTCL
Min
9
0.50
3.30
100
100
1
1
1.5
0.60
0.15
Typ
-0.25
0.65
3.70
25
25
25
1
50
5.85
0.70
0.20
Max
18
1.5
0.80
3.90
0.80
0.25
Units
V
mA
%
V
k
k
M
M
Hz
%
V
mA
VREF
PIN CONFIGURATIONS
PIN DESCRIPTIONS
VDD Supply voltage input.
GND Ground.
VBT Input, to sense battery voltage.
MODE Input, to set IC operation mode.
TIMER Input, for safety timer control.
© 1997 SEMTECH CORP.
VREF Voltage reference output.
LED Output, for LED indicator.
VOUT Output, for LED indicator.
FLASH Output, for LED indicator (14-pin only.)
VNTC Input, for temperature protection (14 pin only).
652 MITCHELL ROAD NEWBURY PARK CA 91320









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SC1766CS14 Даташит, Описание, Даташиты
BATTERY
CHARGE CONTROLLER
Janaury 30, 1998
TYPICAL APPLICATIONS
Step-Down High-Side Current Sense Battery Charger
SC1766
NOTE:
RSENSE = 0.1 ohm, CHARGE CURRENT = 0.5A ±10%, VIN > VBAT +3.5V
RSENSE = 0.05 ohm, CHARGE CURRENT = 1.0A ±10%, VIN > VBAT +4.0V
RSENSE = 0.033 ohm, CHARGE CURRENT = 1.5A ±10%, VIN > VBAT +4.5V
EFFICIENCY > 90%, MEASURED AT CS- NODE
Step-Down Rechargeable Battery Charger
NOTE: +VIN should be higher than 10V. Z1 is required when +VIN exceeds 18V. Fast charge current is ap-
proximately 1A, adjustable through R7. Trickle charge current is adjustable through R12.
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320










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Номер в каталогеОписаниеПроизводители
SC1766CS14BATTERY CHARGE CONTROLLERSemtech Corporation
Semtech Corporation

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