900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Renesas Electronics Components Datasheet

M51995AFP Datasheet

SWITCHING REGULATOR CONTROL

No Preview Available !

M51995AP/AFP
Switching Regulator Control
REJ03D0835-0201
Rev.2.01
Nov 14, 2007
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.
Features
500 kHz operation to MOS FET
Output current : ±2 A
Output rise time 60 ns, fall time 40 ns
Modified totempole output method with small through current
Compact and light-weight power supply
Small start-up current : 90 µA typ.
Big difference between “start-up voltage” and “stop voltage” makes the smoothing capacitor of the power input
section small.
Start-up threshold 16 V, stop voltage 10 V
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 1.5 W (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, CLMpin)
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
REJ03D0835-0201 Rev.2.01 Nov 14, 2007
Page 1 of 40


Renesas Electronics Components Datasheet

M51995AFP Datasheet

SWITCHING REGULATOR CONTROL

No Preview Available !

M51995AP/AFP
Recommended Operating Conditions
Supply voltage range: 12 to 36 V
Operating frequency: less than 500 kHz
Oscillator frequency setting resistance
T-ON pin resistance RON: 10 k to 75 k
T-OFF pin resistance ROFF: 2 k to 30 k
Block Diagram
VCC
ON/OFF
Under
voltage
lockout
OVP (shut down)
Latch
7.1 V
5.8 V
Voltage
regulator
15.2 k
3k
1S
1S 1S
F/B DET GND
500
6S
OP AMP
+
2.5 V
PWM
Comparator
PWM
latch
Oscillator capacitance
CF
Oscillator resistance
T-ON (ON duty)
Oscillator resistance
T-OFF (OFF duty)
VF
Oscillator
(triangle)
+Current
limit latch
Current
limit latch
Intermittent
action and
OSC control
Intermittent
action
Collector
VOUT
Emitter
CLM+
CLM
+Current limit Current limit
CT
Intermittent operation
determine capacitance
REJ03D0835-0201 Rev.2.01 Nov 14, 2007
Page 2 of 40


Part Number M51995AFP
Description SWITCHING REGULATOR CONTROL
Maker Renesas
Total Page 30 Pages
PDF Download

M51995AFP Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 M51995AFP SWITCHING REGULATOR CONTROL
Renesas





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy