U2407B datasheet(1/16 Pages) TEMIC

Part #	U2407B

Description	Simple Controller for Fast Charge Systems

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Manufacturer	TEMIC [TEMIC Semiconductors]

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U2407B

TELEFUNKEN Semiconductors

Rev. A4, 05-Mar-97

1 (16)

Simple Controller for Fast Charge Systems

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

Gradient

d2V/dt2 and –dV

4

2

3

Power supply

VS = 8 to 26 V

Switch output

Power - on control

VRef

6.5 V/10 mA

13

Oscillator

160 mV

Ref

Temp. control

Tmax

Sensor

Battery

detection

VRef = 5 V

Status control

Scan path

VBatt monitor

0.1 to 4 V

Charge break

output

Control unit

12

15

10

9

5

67

8

16

14

1

95 10648

11

Figure 1. Block diagram

Similar Part No. - U2407B

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