NJW4140
MOSFET Drive Switching Regulator IC for Boost / Fly-back Converter
GENERAL DESCRIPTION
The
NJW4140
is a MOSFET Drive switching regulator IC for
Boost / Fly-back Converter that operates wide input range from
3V to 40V. It can provide large current application because of
built-in highly effective Nch MOSFET drive circuit.
Built-in pulse-by-pulse current detecting type over current
protection limits the output current at over load.
It is suitable for boost/fly-back application such as Car
Accessory, Office Automation Equipment, Industrial Instrument
and so on.
■ PACKAGE OUTLINE
NJW4140R
NJW4140M
FEATURES
Nch MOSFET Driving
Wide Operating Voltage Range
PWM Control
Wide Oscillating Frequency
Over Current Protection
UVLO (Under Voltage Lockout)
Standby Function
Package Outline
Driving Voltage 5.3V (typ.)
3V to 40V
40kHz to 1MHz
NJW4140R : MSOP8(VSP8)*
NJW4140M : DMP8
*MEET JEDEC MO-187-DA
Ver.2022-01-19
-1-
NJW4140
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V
+
OUT pin Voltage
V
OUT
SI pin Voltage
V
SI
EN pin Voltage
V
EN
IN- pin Voltage
V
IN-
CT pin Voltage
V
CT
I
O_PEAK+
OUT pin Peak Current
I
O_PEAK-
Power Dissipation
Junction Temperature
Storage Temperature
P
D
T
jmax
T
stg
(Ta=25°C)
UNIT
V
V
V
V
V
V
mA
mW
MAXIMUM RATINGS
+45
-0.3 to +6 (*1)
-0.3 to +6
+45
+6
+6 (*1)
200 (Source)
700 (Sink)
MSOP8(VSP8)
595 (*2)
DMP8
530 (*2)
+150
-40 to +150
C
C
(*1): When Supply voltage is less than +6V, the absolute maximum EN pin voltage is equal to the Supply voltage.
(*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
MIN.
Supply Voltage
V
+
3
Timing Capacitor
C
T
120
Oscillating Frequency
f
OSC
40
Operating Temperature
T
opr
-40
TYP.
–
–
–
–
MAX.
40
3,900
1,000
+85
UNIT
V
pF
kHz
C
Ver.2022-01-19
-3-
NJW4140
ELECTRICAL CHARACTERISTICS
(Unless otherwise noted, V
+
=V
EN
=12V, C
T
=470pF, Ta=25C)
PARAMETER
Oscillator Block
Oscillation Frequency 1
Oscillation Frequency 2
Charge Current
Discharge Current
Voltage amplitude
Oscillation Frequency
deviation (Supply voltage)
Oscillation Frequency
deviation (Temperature)
Oscillation Frequency
(Low Frequency Control)
Soft Start Block
Soft Start Time
Error Amplifier Block
Reference Voltage
Input Bias Current
Open Loop Gain
Gain Bandwidth
Output Source Current
Output Sink Current
PWM Comparate Block
Input Threshold Voltage
(FB pin)
Maximum Duty Cycle
Current Limit Detection Block
Current Limit Detection
Voltage
Delay Time
Output Block
Output High Level
ON Resistance
Output Low Level
ON Resistance
Output Source Current
Output pin Limiting Voltage
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
f
OSC1
f
OSC2
I
chg
I
dis
V
OSC
f
DV
f
DT
f
OSC_LOW
C
T
=470pF
C
T
=680pF
270
180
150
150
–
300
210
200
200
0.7
1
6
105
330
240
250
250
–
–
–
120
kHz
kHz
A
A
V
%
%
kHz
V
+
=3 to 40V
Ta= -40 to +85C
V
IN-
=0.3V, V
FB
=0.7V,
C
T
=470pF
–
–
90
T
SS
V
B
=0.75V
2
4
8
ms
V
B
I
B
A
V
G
B
I
OM+
I
OM-
V
FB
=1V, V
IN-
=0.7V
V
FB
=1V, V
IN-
=0.9V
-1.0%
-0.1
–
–
50
2
0.8
–
80
3
100
4
+1.0%
0.1
–
–
150
6
V
A
dB
MHz
A
mA
V
T_0
V
T_50
M
AX
D
UTY
Duty=0%, V
IN-
=0.6V
Duty=50%, V
IN-
=0.6V
V
FB
=1.2V
0.32
0.63
85
0.4
0.7
90
0.54
0.77
95
V
V
%
V
IPK
T
DELAY
ΔV
SI
=300mV
115
–
140
90
165
–
mV
ns
R
OH
R
OL
I
OH
V
OLIM
I
O
= -50mA
I
O
= +50mA
OUT pin= 4.5V
–
–
45
5
3
2.5
65
5.3
4.5
3.5
85
5.55
mA
V
-4-
Ver.2022-01-19
NJW4140
ELECTRICAL CHARACTERISTICS
(Unless otherwise noted, V
+
=V
EN
=12V, C
T
=470pF, Ta=25C)
PARAMETER
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Enable Control Block
ON Control Voltage
OFF Control Voltage
Pull-down Resistance
General Characteristics
Quiescent Current
Standby Current
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
T_ON
V
T_OFF
V
+
= L → H
V
+
= H → L
2.65
2.4
2.8
2.55
2.95
2.7
V
V
V
ON
V
OFF
R
PD
V
EN
= L → H
V
EN
= H → L
1.7
0
–
–
–
500
V
+
0.9
–
V
V
k
I
DD
I
DD_STB
R
L
=no load, V
IN-
= V
FB
= 0.7V
V
EN
=0V
–
–
1.4
2.5
1.7
6
mA
A
Ver.2022-01-19
-5-
京公网安备 11010802033920号
Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved
EEWORLD
