U2400B データシートの表示（PDF） - Temic Semiconductors

部品番号

コンポーネント説明

メーカー

U2400B

Charging of Batteries with Automatic Pre-Discharge

Temic Semiconductors 

U2400B

Applications

Quick charge for NiCd-batteries with PWM method

Figure 15 describe the current regulations with PWM.

Mean value of the charge current for the battery which is

created across power transistor T2 is so dimensioned that

it is independent of supply and battery voltage. For the

purpose of regulation, load current is obtained via resistor

W R20 = 0.2 , whose voltage drop serves as actual value for

the operation amplifier. It is however recommended to

use PNP-differential input stage due to its relatively low

loss of power across the shunt resistance (P = 0.2 W, @

200 mV with 1 A charge current).

GND is the negative supply for operational amplifier

whereas the reference point for other components of the

IC is different i.e., positive shunt drop voltage. Current set

point is given across the voltage divider R15/P1 whereas

the actual value across R18 with a common point, the

resistance R20.

The output voltage of operational amplifier delivers the

voltage for PWM-control at Pin 2. Current regulation acts

only on charge current, whereas discharge current is spe-

cified by R14.

Maximum and minimum voltage adjustment for variety

of cells (batteries) can be calculated with R4/R2 and

R5/R3 ratios.

94 9388

R9

0.5 h

1h

12 h

16

15

14

13

12

11

10

9

Mode

Time Charge GND Discharge Status

U2400B

Sync PWM Osc Vmax Temp Vmin VRef +VS

1

2

3

4

5

6

7

8

R13

BD442

T2

D3 BYT77

Peak

R11 current

limitation

+12 V

R15

R19

C7

D2

+ LM358 R16

–

C6

R18

P1

Charge current set point

W R1 = 390 k

R2, R3 = see table 1, under figure 16

W R4, R5, R16, R18, R19 = 100 k

W R6 = 30 k

W R7, R8 = 270

D Charge current regulation

D Automatic pre-discharge

D Charge time: 0.5 h, 1 h, 12 h

R1

C2 C4

R4 R17

R5

R10

C5

C3

C1

R2

R6

R3

R12

T1

BD441

NTC Sensor

W R(25) =10 k

B value =3474

W R20 0.2

red R7

R8

green

TLHR 5400

TLHG 5400

GND

W R9, R10 = 180

W R12, R13, R15 = 10 k

W R17 = 1.5 k

W R20 = 0.2

P1 = 1 kW

m C1, C7 = 100 F

C2 = 15 nF

m C3 = 10 F

m C4, C5, C6 = 0.33 F

D2 = IN4148

Figure 15.

D Temperature monitoring

D Status indication

TELEFUNKEN Semiconductors

Rev. A2, 21-Nov-96

11 (15)

Share Link: