M54128L/FP データシートの表示（PDF） - Mitsumi

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M54128L/FP

EARTH LEAKAGE CURRENT DETECTOR

Mitsumi 

MITSUBISHI <CONTROL / DRIVER IC>

M54128L/FP

EARTH LEAKAGE CURRENT DETECTOR

DESCRIPTION

The M54128 is a semiconductor integrated circuit designed for

high-speed type earth leakage breakers. This lC includes leakage

and abnormal voltage detecting functions.

FEATURES

q lmprovement of ability against unwanted tripping due to Iightning

-surge.

• Adopt the two times counting system.

• lmprovement of ability against needless action due to lightning-

impulse.

q lt is a possible that cope with lEC owing to mode change.

• Adopt the 1.5 times counting system.

q High input impedance :

• Filter circuit can be formed with externally attached C/R.

• lmprovement of ability against needless action due to high

frequency and high harmonics.

q High input sensitivity : VT = 6.5mVrms

q Abnormal voltage detecting (neutral conductor open-phase

protection) function :

• Neutral conductor open-phase protection at single-phase three-

wire system

• ln case of no use this function, stop this function and reduction

of circuit current, possible.

q Low voltage operation : 7 to12V (conventional Mitsubishi

lCs : 12 to 20V)

q Low current dissipation :

• In stand-by condition : 820µA typical (Vs = 9V, Ta = 25°C)

• When SCR is ON : 740µA typical (Vs = 9V, Ta = 25°C)

q Highly stable design : Employment of circuits of which

characteristics fluctuations resulting from changes in supply

voltage/ambient temperature are small.

APPLICATION

Earth leakage breaker

RECOMMENDED OPERATING CONDITIONS

Supply voltage range • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • 7 to12V

Operating ambient temperature • • • • • • • • • • • • • • • • • • • • • • • • -20 to +85°C

PIN CONFIGURATION (TOP VIEW)

GND 1

IREF 2

VREF 3

ILKI 4

TRC1 5

TRC2 6

PSEL 7

14 VS

13 VCC

12 PSAV

11 IBLI

10 TTDC

9 OFFC

8 SCRT

Outline 14P2N-A

SCRT 1

OFFC 2

TTDC 3

IBLI 4

PSAV 5

VCC 6

VS 7

GND 8

IREF 9

VREF 10

ILKI 11

TRC1 12

TRC2 13

PSEL 14

Outline 14P5A

BLOCK DIAGRAM

VS

VCC

PSAV

IBLI

TTDC

OFFC

SCRT

Power supply circuit

Abnormal voltage

detection

SCR-driver

Leakage detection

GND

IREF

VREF

ILKI

TRC1

TRC2

PSEL

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