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PDF M51995FP Data sheet ( Hoja de datos )

Número de pieza M51995FP
Descripción SWITCHING REGULATOR CONTROL
Fabricantes Mitsubishi 
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No Preview Available ! M51995FP Hoja de datos, Descripción, Manual

MITSUBISHI (Dig./Ana. INTERFACE)
M51995AP/FP
DESCRIPTION
M51995A is the primary switching regulator controller which is
especially designed to get the regulated DC voltage from AC power
supply.
This IC can directly drive the MOS-FET with fast rise and fast fall
output pulse.
Type M51995A has the functions of not only high frequency OSC
and fast output drive but also current limit with fast response and
high sensibility so the true "fast switching regulator" can be
realized.
It has another big feature of current protection to short and over
current,owing to the integrated timer-type protection circuit,if few
parts are added to the primary side.
The M51995A is equivalent to the M51977 with externally re-
settable OVP(over voltage protection)circuit.
SWITCHING REGULATOR CONTROL
PIN CONFIGURATION (TOP VIEW)
COLLECTOR 1
VOUT 2
EMITTER 3
VF 4
ON/OFF 5
OVP 6
DET 7
F/B 8
16 Vcc
15 CLM+
14 CLM-
13 GND
12 CT
11 T-OFF
10 CF
9 T-ON
Outline 16P4
FEATURES
500kHz operation to MOS FET
•Output current...............................................................±2A
•Output rise time 60ns,fall time 40ns
•Modified totempole output method with small through current
Compact and light-weight power supply
•Small start-up current............................................90µA typ.
•Big difference between "start-up voltage" and "stop voltage"
makes the smoothing capacitor of the power input section small.
Start-up threshold 16V,stop voltage 10V
•Packages with high power dissipation are used to with-stand the
heat generated by the gate-drive current of MOS FET.
16-pin DIP,20-pin SOP 1.5W(at 25°C)
Simplified peripheral circuit with protection circuit and built-in
large-capacity totempole output
•High-speed current limiting circuit using pulse-by-pulse
method(Two system of CLM+pin,CLM-pin)
•Protection by intermittent operation of output over current......
..........................................................Timer protection circuit
•Over-voltage protection circuit with an externally re-settable
latch(OVP)
•Protection circuit for output miss action at low supply
voltage(UVLO)
High-performance and highly functional power supply
•Triangular wave oscillator for easy dead time setting
APPLICATION
Feed forward regulator,fly-back regulator
COLLECTOR 1
VOUT 2
EMITTER 3
VF 4
HEAT SINK PIN
5
6
ON/OFF 7
OVP 8
DET 9
F/B 10
20 Vcc
19 CLM+
18 CLM-
17 GND
16
HEAT SINK PIN
15
14 CT
13 T-OFF
12 CF
11 T-ON
Outline 20P2N-A
Connect the heat sink pin to GND.
RECOMMENDED OPERATING CONDITIONS
Supply voltage range............................................12 to 36V
Operating frequency.................................less than 500kHz
Oscillator frequency setting resistance
•T-ON pin resistance RON...........................10k to 75k
•T-OFF pin resistance ROFF..........................2k to 30k
( 1 / 27 )

1 page




M51995FP pdf
MITSUBISHI (Dig./Ana. INTERFACE)
M51995AP/FP
SWITCHING REGULATOR CONTROL
TYPICAL CHARACTERISTICS
1800
THERMAL DERATING
(MAXIMUM RATING)
1500
1200
900
600
300
0
0 25 50 75 85 100 125 150
AMBIENT TEMPERATURE Ta(°C)
CIRCUIT CURRENT VS.SUPPLY VOLTAGE
(OVP OPERATION)
8.0
OVP RESET POINT
7.0
8.87V(-30°C)
8.94V(25°C)
9.23V(85°C)
6.0
CIRCUIT CURRENT VS.SUPPLY VOLTAGE
(NORMAL OPERATION)
22m
RON=18k
18m
ROFF=20k
fOSC=500kHz
16m
14m
12m
10m
fOSC=100kHz
100µ
50µ
Ta=-30°C
Ta=25°C
Ta=85°C
0 10 20 30 40
SUPPLY VOLTAGE Vcc(V)
CIRCUIT CURRENT VS.SUPPLY VOLTAGE
(OFF STATE)
3.0
5.0
4.0 Ta=-30°C
Ta=25°C
3.0 Ta=85°C
2.0
2.0 Ta=25°C
Ta=85°C
Ta=-30°C
1.0
1.0
0
0 10.0 20.0 30.0 40.0
SUPPLY VOLTAGE Vcc(V)
0
0 10
20 30
40
SUPPLY VOLTAGE Vcc(V)
CIRCUIT CURRENT VS.SUPPLY VOLTAGE
(TIMER OFF STATE)
3.0
OVP TERMINAL THRESHOLD VOLTAGE
VS.AMBIENT TEMPERATURE
1.1
1.0
2.0 Ta=25°C
Ta=85°C
Ta=-30°C
1.0
0.9
0.8 H threshold voltage
(VTHOVPH)
0.7
0.6 L threshold voltage
(VTHOVPL)
0.5
0.4
0
0 10
20 30 40
SUPPLY VOLTAGE Vcc(V)
0.3
-40 -20 0 20 40 60 80 100
AMBIENT TEMPERATURE Ta(°C)
( 5 / 27 )

5 Page





M51995FP arduino
CURRENT FROM OVP TERMINAL FOR OVP
RESET VS. SUPPLY VOLTAGE
800
700
600
500
Ta=-30°C
Ta=25°C
400 Ta=85°C
300
200
100
0
0
5 10 15 20 25 30 35 40
SUPPLY VOLTAGE Vcc(V)
MITSUBISHI (Dig./Ana. INTERFACE)
M51995AP/FP
SWITCHING REGULATOR CONTROL
( 11 / 27 )

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