CS2516KN8 [CHERRY]
Pulse-Load Battery Monitor; 脉冲负载电池监视器
| 型号： | CS2516KN8 |
| 厂家： | 
CHERRY SEMICONDUCTOR CORPORATION |
| 描述： | Pulse-Load Battery Monitor |
| 文件： | 总6页 (文件大小：147K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CS2516
Pulse-Load Battery Monitor
Description
Features
The CS2516 is designed for use in bat-
external transistor can be added to in-
crease the load current capability.
Adjustable Battery Sense
from 7 to 12 Volts
■
■
■
tery powered medical, security, or
environmental systems where prior
notification of impending power
source failure is a requirement. The IC
effectively provides continuous moni-
toring of battery condition by pulse-
sampling the system voltage at prede-
termined intervals. Low standby cur-
rent permits unswitched connection to
the battery with minimal impact on
operating life. The ability to load the
battery during the test pulse provides
assurance that sufficient reserve capac-
ity exists to operate critical system
components.
Should, during the test pulse, the sense
terminal voltage fall below the thresh-
old level determined by the internal
(synthesized) temperature compensat-
ed zener diode, the comparator will
permit a charging current to flow out
of PW. This pin is also the input of a
Schmitt trigger that in turn drives the
output transistor. Collectively, the
charge current and trigger, in conjunc-
tion with an external RC network,
operate as a Òpulse-stretcherÓ to pro-
vide output ÒONÓ times that are a
multiple of the sampling time. This
feature permits low battery alarm
devices or visible annunciators to be
driven directly by the IC. The maxi-
mum permissible output current is
30mA.
Pulse Loads Battery at up
to 50mA
Standby Current Under
10µA
■ Test Period, Rate and Load
Adjustable
■ On Chip 15mA Output
Driver
The CS2516 contains an internal timer
that generates a 1.0 millisecond test
pulse once each 33 seconds (both times
are typical). The load switch transistor
conducts only during the test pulse,
and can sink up to 50mA directly. An
Block Diagram
Package Options
8L PDIP and 8L SO
R
p
V
CC
1
2
3
4
8
7
6
5
R
V
CC
P
SENSE
PW
C
OUT
T
SENSE
PW
COM
Load
Switch
C
T
OUT
Cycle
Timer
COM
Load Switch
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
Rev. 1/17/95
A
Company
¨
1
Absolute Maximum Ratings
Supply Voltage (VCC).........................................................................................................................................................0 to 14V
Rp Input Voltage ............................................................................................................................................................-0.5 to VCC
SENSE, CT, PW, Output and Load Switch....................................................................................................................-0.5 to 8V
Load Current...........................................................................................................................................................................50mA
Output Current ......................................................................................................................................................................30mA
Storage Temperature.................................................................................................................................................-40 to +150ûC
Lead Temperature Soldering: Wave Solder (through hole styles only)..........................................10 sec. max, 260¡C peak
Reflow (SMD styles only) ..........................................60 sec. max above 183¡C, 230¡C peak
Electrical Characteristics: VCC = 9V, Rp = 9.1 M½, CT = 4.7µF, Cpw = 0.1µF, Rpw = 10M½,
0¡ ² TA ² 85¡ unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
■ VCC
Operating Voltage
Standby Current
9
4
12
10
V
µA
■ Cycle Timer
Charge Current
VC =0V, 6V²VCC²12V
-1.70
-0.77
-1.20
-0.74
-0.48
-0.71
µA
µA
2VT² VCT < 7.5V
Discharge Current
VCT= 8.8V
VCT= 2.0V
8.0
1.1
20.0
3.0
25.0
3.6
mA
mA
Discharge Impedance
4.6V < VCT< 8.0V
440
8.0
1.0
4.6
½
Upper Charge Threshold
Lower Charge Threshold
-0.48µA < ICT < -1.70µA
-0.48µA < IC < -1.70µA
7.0
0.5
2.0
9.0
3.0
6.0
V
V
V
Lower Discharge Threshold 1.1mA < IC< 25mA
■ Load Switch
ÒONÓ Voltage
ÒOFFÓ Current
ILoad Switch = 50mA
VLoad Switch = 12V
0.3
0.5
1.0
V
µA
■ Sense Input
Threshold Voltage
6.3
5.0
6.7
150
8.5
7.1
V
Threshold Temp Coefficient 0¡C < TA < 85¡C
Active Impedance
ppm/¡C
k½
12.0
■ Pulse Stretcher
Source Current
VSENSE = 6.3V, VPW = 0V
CC=VSENSE=6.3V, VPW = 0V
-950
-300
-550
-250
-250
-200
µA
µA
V
Schmitt Upper Threshold
Hysteresis
2.25
0.60
2.50
1.00
2.75
1.40
1.00
V
V
Input Bias Current
VSENSE=7.1V, VPW=1.2V
µA
■ Output Switch
ÒONÓ Voltage
V
PW = 3V; IOUT = 15mA
0.1
0.5
1.0
V
ÒOFFÓ Current
VPW = 0V; VOUT = 12V
µA
2
Electrical Characteristics: VCC = 9V, RP = 9.1 M½, CT = 4.7µF, Cpw = 0.1µF, Rpw = 10M½,
0¡ ² TA ² 85¡ unless otherwise specified
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
■ Recommended Component Values
Rp Program Resistor
1.0
4.7
0.01
1
9.1
M½
µF
CT Cycle Timer Capacitor
22.0
0.10
10
CPW Pulse Stretcher Capacitor
µF
R
PW Pulse Stretcher Resistor
M½
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8L PDIP & SO Narrow
1
2
3
4
5
6
7
8
RP
Test period programming resistor.
Voltage sense comparator input.
Test period, duration programming capacitor.
Common negative
SENSE
CT
COM
Load Switch
OUT
PW
Collector of pulse loading NPN transistor.
Alarm Pulse width-stretcher output
Output pulse-width programming RC.
Power source.
VCC
Typical Performance Characteristics
CT Discharge Impedance vs CT Voltage (Typ +25¡C)
1000
900
800
700
600
500
400
8.8
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
CT Voltage
Timing Diagram
VCC
7.1V
VCC
6.7V
33S
Tt
8V
CT
4.6V
1V
Tp
1.14ms
1V
1V
Load
Switch
VCC
VCC
Vsat
Td
1ms
2.5V
1.5V
0V
0V
PW
Tpw
Vsat
510ms
OUT
VCC
VCC
BATT. OK
BATT. LOW
3
Applications Formulae and Typical Values
VCC
RP
9V
9.1m½
Program and Standby Currents: IP =
=
Å 1µA Standby Current = 4IP = 4µA (typ.)
VTCT 7CT
7 x 4.7µF
1µA
Cycle Timer Period: Tt =
=
=
Å 33sec.,
IP
1µA
where Vt = Upper Charge Threshold - Lower Charge Threshold (7V typ.)
Test Pulse Width: Tp = RdCT x ln(VP) Å 242CTÅ 242 x 4.7µF Å 1.14ms
where Rd is the dynamic cycle timer discharge impedance (440½ typ.)
Upper Charge Threshold
Lower Discharge Threshold
[1n(VP) = 0.55 typ.]
and VP =
2.5 x 0.1µF
250µA
VdCPW 2.5CPW
Pulse Stretcher: Delay Time: TD =
=
=
Å 1ms
Isrc
250µA
where Vd = Schmitt Trigger Upper Threshold (2.5V typ.)
and Isrc = Typical source current at the PW pin at the nominal low battery sense threshold of 6.7V.
Pulse Width: Tp = CPWRPW ln(VS) Å 0.51 x 0.1µF x 10m½ Å 510ms.
Schmitt Trigger Upper Threshold
and VS =
[ln(VS) = 0.51 typ.]
Schmitt Trigger Hysteresis
Applications Information
The value of Rp affects standby current, operating current,
and the test cycle period. The recommended value is
(V+/1µA) where V+ is the fresh battery voltage. Higher
values of Rp are not recommended. Minimum recom-
mended value is (V+/10µA) which will increase both the
standby and operating currents by 10X and reduce the test
cycle period by the same factor; the test pulse width will
be unaffected.
The pulse stretcher components RPW and CPW should be
selected such that the delay timer to charge CPW is shorter
than the test pulse width programmed by Ct to guarantee
operation of the Output. The output is an open-collector
transistor which may be used to drive an indicator device
directly or to interface to logic family devices.
The SENSE input typical 8.5k½ input impedance appears
only during the test pulse; otherwise the SENSE input is in
a high impedance state. The effective low battery thresh-
old voltage can be modified (increased only) by means of a
voltage divider placed across the load resistor. This tech-
nique can also be used to effectively reduce the threshold
tolerance band.
The value of Ct affects both the test cycle period and the
test pulse width. Of critical importance is the selection of a
low leakage type capacitor; if leakage current exceeds the
cycle timer charge current, the timer will not operate.
Typical Application Circuit
R
p
V
CC
R
p
V
CC
9.1MW
C
pw
0.1mF
SENSE
PW
R
pw
CS2516
10MW
510W
C
T
+
C
T
OUT
4.7mF
COM
Load Switch
220W
+
9V
4
Increased Pulse-Load Current Capability
Rp
+
Rp
VCC
9V
9.1MW
Cpw
0.1mF
SENSE
CT
PW
Rpw
CS2516
CT
+
10MW
OUT
OUT
4.7mF
820W
COM
Load Switch
220W
RL
12V Battery Application with 9V Threshold
Rp
+
51W
Rp
VCC
12V
9.1MW
Cpw
0.1mF
Rpw
SENSE
CT
PW
CS2516
10MW
CT
+
OUT
OUT
150W
4.7mF
COM
Load Switch
Adjustable Sense Threshold
200W
Rp
+
Rp
VCC
9V
9.1MW
Cpw
0.1mF
SENSE
CT
PW
Rpw
10MW
OUT
CS-2516
CT
+
OUT
RL
220W
1.8kW
4.7mF
COM
Load Switch
5
Package Specification
PACKAGE DIMENSIONS IN mm (INCHES)
PACKAGE THERMAL DATA
D
Thermal Data
8L PDIP
8L SO
Lead Count
Metric
English
Max Min
.400 .355
.197 .189
RQJC
RQJA
typ
typ
52
45
ûC/W
ûC/W
Max
Min
9.02
4.80
100
165
8L PDIP
8L SOIC
10.16
5.00
Surface Mount Narrow Body (D); 150 mil wide
6.20 (.244)
5.80 (.228)
4.00 (.157)
3.80 (.150)
0.51 (.020)
0.33 (.013)
1.27 (.050) BSC
1.75 (.069) MAX
1.57 (.062)
1.37 (.054)
0.25 (.010)
0.19 (.008)
1.27 (.050)
0.40 (.016)
0.25 (0.10)
0.10 (.004)
D
REF: JEDEC MS-012
Plastic DIP (N); 300 mil wide
7.11 (.280)
6.10 (.240)
1.77 (.070)
1.14 (.045)
8.26 (.325)
7.62 (.300)
2.54 (.100) BSC
3.68 (.145)
2.92 (.115)
0.39 (.015)
MIN.
.356 (.014)
.203 (.008)
.558 (.022)
.356 (.014)
Some 8 and 16 lead
packages may have
1/2 lead at the end
of the package.
REF: JEDEC MS-001
D
All specs are the same.
Ordering Information
Part Number
CS2516KN8
CS2516KD8
CS2516KDR8
Description
8 Lead PDIP
8 Lead SOIC
Ch erry Sem icon du ctor Corporation reserves th e
righ t to m ake ch an ges to th e specification s with ou t
n otice. Please con tact Ch erry Sem icon du ctor
Corporation for th e latest available in form ation .
8 Lead SOIC (tape & reel)
Rev. 1/17/95
© 1999 Cherry Semiconductor Corporation
6
相关型号：
CS2540-7EPB2
DC-DC Regulated Power Supply Module, 2 Output, 100W, Hybrid, METAL, CASE S02, MODULE
BEL
CS2540-7EPD0
DC-DC Regulated Power Supply Module, 2 Output, Hybrid, HEAT SINK, METAL, CASE S02, MODULE
BEL
CS2540-7EPD0T
DC-DC Regulated Power Supply Module, 2 Output, 100W, Hybrid, HEAT SINK, METAL, CASE S02, MODULE
BEL
CS2540-7EPD0TB2
DC-DC Regulated Power Supply Module, 2 Output, 100W, Hybrid, METAL, CASE S02, MODULE
BEL
CS2540-7EPD1
DC-DC Regulated Power Supply Module, 2 Output, Hybrid, HEAT SINK, METAL, CASE S02, MODULE
BEL
CS2540-7EPD1B2
DC-DC Regulated Power Supply Module, 2 Output, 100W, Hybrid, METAL, CASE S02, MODULE
BEL
CS2540-7EPD1T
DC-DC Regulated Power Supply Module, 2 Output, Hybrid, HEAT SINK, METAL, CASE S02, MODULE
BEL
CS2540-7EPD1TB2
DC-DC Regulated Power Supply Module, 2 Output, 100W, Hybrid, METAL, CASE S02, MODULE
BEL
©2020 ICPDF网 联系我们和版权申明