M51995AFP#CF0J Renesas Electronics America, M51995AFP#CF0J Datasheet - Page 34

• Manufacturer Part Number: M51995AFP#CF0J
• Description: IC SWIT PWM SMPS OVP UVLO 20SOIC
• Manufacturer: Renesas Electronics America

Specifications of M51995AFP#CF0J

• Output Isolation: Isolated
• Frequency Range: 170 ~ 207kHz
• Voltage - Input: 9.9 ~ 36 V
• Power (watts): 1.5W
• Operating Temperature: -30°C ~ 85°C
• Package / Case: 20-SOIC (0.200", 5.30mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

M51995AP/AFP
Current Limiting Circuit
1. Peripheral circuit of CLM+, CLM− terminal
REJ03D0835-0300 Rev.3.00 Jun 06, 2008
Page 32 of 40
Figure 29 and 30 show the example circuit diagrams around the CLM+ and CLM− terminal. It is required to
connect the low pass filter, as the main current or drain current contains the spike current especially during the turn-
on duration of MOS FET.
1,000 pF to 22,000 pF is recommended for C
detecting-sensitivity” and to consist the low pass filter.
To design the R
I
In order to be not influenced from these resistor paralleled value of R
be less than 100 Ω.
The R
NFCLM−
CLM
), which value is in the range of 90 to 270 µA.
should be the non-inductive resistor.
NF1
and R
Input
smoothing
capacitor
Input
smoothing
capacitor
Figure 30 Peripheral Circuit Diagram of CLM− Terminal
Figure 29 Peripheral Circuit Diagram of CLM+ Terminal
NF2
C
C
FIN
FIN
, it is required to consider the influence of CLM terminal source current (I
+
+
M51995A
M51995A
V
GND
V
CC
CC
CLM−
NF
Collector
Emitter
Collector
and the R
V
CLM+
V
Emitter
GND
OUT
OUT
NF1
+
+
R1
R1
C
C
and R
VCC
VCC
C
C
NF
NF
NF2
R
R
NF1
R
NF2
have the functions both to adjust the “current-
NF2
NF1
R
and R
NF1
R
R
CLM
CLM
NF2
, (R
NF1
/R
NF2
) is recommended to
INCLM+
or