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PDF U2407B Data sheet ( Hoja de datos )
| Número de pieza | U2407B | |
| Descripción | Simple Controller for Fast Charge Systems | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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Simple Controller for Fast Charge Systems
U2407B
Description
The bipolar IC U2407B is a fast charge battery controller
for drained NiCd/ NiMH batteries. Apart from phase
control, it is identical with U2405B, but has four LED
outputs. The IC enables the designer to create an efficient
and economic charge system. The U2407B incorporates
an intelligent multiple-gradient battery-voltage moni-
toring combined with temperature and failure mode
detection. With automatic top-off charging, the
integrated circuit ensures that the charge device stops
regular charging before the critical stage of overcharging
is achieved. It incorporates an additional algorithm for
reactivating fully drained batteries especially after long
time storage. It has four LED driver outputs for different
indications of the charge status.
Features
D Multiple gradient monitoring
D Temperature window (Tmin/Tmax)
D Exact currentless measurement
D Four LED status outputs
D Linear power control
D Preferred for externally regulated current sources
D Preformation algorithm for drained batteries
D Programmable top-off charge function
Applications
D Primary switch mode
D AC/ DC wall plug adapter
D Ultra fast charger (10 minutes)
Package: DIP16/ SO16
13
VRef
6.5 V/10 mA
16 Switch output
Power - on control
14
Power supply
1 VS = 8 to 26 V
95 10648
4
12
Oscillator
Control unit
Gradient
d2V/dt2 and –dV
160 mV
Ref
Temp. control
Tmax Sensor
56
Figure 1. Block diagram
7
15 2 3 10
Status control
Scan path
Battery
detection
VRef = 5 V
VBatt monitor
0.1 to 4 V
Charge break
output
8
11
9
TELEFUNKEN Semiconductors
Rev. A4, 05-Mar-97
1 (16)
1 page  
Start Power on reset
LED1,2,3,4 off
U2407B
*) 70 mV > VBatt > 5V
yes
Batt. inserted
*)
Reset
no
no
LED1 blinking
Temp. range
ok ?
Preformation
yes current I RB1
LED3 blinking
Temp. range
ok ?
yes
Charge stop
no
LED1 blinking
Fast charge
begins
yes
VBatt > 1.6 V
no
yes
tch > 10 min
VBatt 4 V
yes
–dV
no switch off
no
Batt. inserted
*)
yes
no
Charge time
t1 > 5 min ?
no
LED1 blinking
LED3 off
–dV and d2V/dt2
yes monitoring activated
yes
Batt. inserted
no
*)
Batt temp
no range?
yes
LED1 blinking
–dV
disconnect
no
d2V/dt2
disconnect ?
no
LED2 on
LED2 on
LED4 on
Trickle charge
1/256 IO
Top off charge
1/4 IO
yes
Batt. inserted
*)
no
yes no
t2 > 20 min
Figure 4. Flow chart
95 10671
TELEFUNKEN Semiconductors
Rev. A4, 05-Mar-97
5 (16)
5 Page 
U2407B
Absolute Maximum Ratings
Reference point Pin 2 (GND), unless otherwise specified
Parameters
Supply voltage
Pin 14
Voltage limitation
Current limitation
t < 100 ms
IS = 10 mA
Pin 14
Voltages at different pins Pins 16, 2, 3, 10 and 15
Pins 11 up to 13, 4 up to 9
Currents at different pins Pin 1
Pins 3 up to 14 and 16 up to 18
Power dissipation Tamb = 60°C
Ambient temperature range
Junction temperature
Storage temperature range
Symbol
VS
IS
V
I
Ptot
Tamb
Tj
Tstg
Value
26
31
25
100
26
7
25
10
650
– 10 to +85
125
– 40 to +125
Unit
V
mA
V
mA
mW
°C
°C
°C
Thermal Resistance
Junction ambient
Parameters
Symbol
RthJA
Maximum
100
Unit
K/W
Electrical Characteristics
VS = 12 V, Tamb = 25°C, reference point Pin 1 (GND), unless otherwise specified
Parameters
Test Conditions / Pins
Power supply
Pin 14
Voltage range
Power-on threshold
ON
OFF
Current consumption
without load
Reference
Pin 13
Reference voltage
Reference current
IRef = 5 mA
IRef = 10 mA
Temperature coefficient
Operational amplifier OP
Output voltage range
Output current range
Output pause current
I5 = 0
V5 = 3.25 V
Pin 4
Pin 4
Pin 4
Non-inverting input voltage
Pin 5
Non-inverting input current
Pin 5
Comparator or temperature control
Input current
Pins 6 and 7
Input voltage range
Pins 6 and 7
Threshold voltage
Pin 7
Charge break output
Pin 8
Output voltage
Output current
High, I8 = 4 mA
Low, I8 = 0 mA
V8 = 1 V
Symbol
VS
VS
IS
VRef
– IRef
TC
V4
±I4
–Ipause
V5
±I5
±I6, 7
V6, 7
V7
V8
I8
Min.
8
3.0
4.7
3.9
6.19
6.14
0.15
80
100
0
0
3.85
8.4
10
Typ.
6.5
6.5
– 0.7
Max. Unit
26 V
3.8 V
5.7 V
9.1 mA
6.71 V
6.77 V
10 mA
mV/K
5.8 V
mA
mA
5V
0.5 mA
0.5 mA
5V
4.15 V
V
100 mV
mA
TELEFUNKEN Semiconductors
Rev. A4, 05-Mar-97
11 (16)
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet U2407B.PDF ] | |
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