M54128L Datasheet, PDF (1/15 Pages) Mitsubishi Electric Semiconductor – EARTH LEAKAGE CURRENT DETECTOR

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