Battery monitoring circuit

Example of battery total voltage monitoring circuit using photorelay and IC output photocoupler

Battery monitoring circuit

Lineup

Photorelays

Part number

 TLX9175J TLX9160T

Isolation voltage [Vrms]

3750

 5000

Blocking voltage [V]

600

 1500

Trigger LED current [mA]

@Ta = 25 °C

3 (@ION = 15 mA)

 3 (@ION = 50 mA)

On-resistance [Ω]

@IF = 10 mA, Ta = 25 °C

Max

335 (@ION = 15 mA)

 250 (@ION = 50 mA)

Min

185 (@ION = 15 mA)

 -

AEC-Q101

✔

 ✔

Automotive Photorelays

IC output photocoupler

Part number

 TLX9304 TLX9309 TLX9310 TLX9378 TLX9376

Isolation voltage [Vrms]

3750

3750

3750

3750

3750

Output type

Open collector (INV)

Open collector (INV)

Totem pole (BUF)

Open collector (INV)

 Totem pole (INV)

Power supply voltage [V]

30

30

6

6

6

Threshold input current
(Max) [mA]

5

Analog

1

5

4

Power supply current
(Max) [mA]

1.3

 -

0.3

1.3

1.7

Data rate (Typ.)

1Mbps

1Mbps

5Mbps

10Mbps

20Mbps

AEC-Q101

✔

✔

✔

✔

✔

Automotive Photocouplers

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