Automotive NJW4141
2 - phase Boost Converter Switching Regulator IC
GENERAL DESCRIPTION
The
NJW4141
is a 2-phase boost converter switching regulator
IC that operates wide input range from 3V to 40V.
It can optimize applications by external phase compensation and
voltage mode control.
The digital phase shifter adds 180 degree phase shift signal to
the PWM signal and controls boost circuit by 2-phase operation.
The 2-phase operation reduces an input ripple current and realizes
large output current applications.
It has a pulse-by-pulse over current protection circuit that limits an
output current at over load. When recovering from abnormal load
condition, switching operation restarts automatically.
The
NJW4141
suitable for large output current application such
as a boost power supply of audio amplifier and a boost application
from battery unit.
■
PACKAGE OUTLINE
NJW4141VC3-T1
FEATURES
2-phase Boost Converter Application
Correspond to Operating Temperature 125 C
Nch MOSFET Driving
Driving Voltage 5.1V typ.
Wide Operating Voltage Range
3V to 40V
PWM Control
Wide Oscillating Frequency
50kHz to 500kHz
Adjustable Soft Start Function
Dead Time Control
UVLO (Under Voltage Lockout)
Over Current Protection
Standby Function
Package Outline
NJW4141VC3-T1 : SSOP20-C3
Ver.2016-02-22
-1-
Automotive NJW4141
PIN CONFIGURATION
OUT1
SENSE1
REG_DRV1
PGND
AGND
VREG1.5
CT
DTC
FB
IN-
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OUT2
SENSE2
REG_DRV2
N.C.
V
+
ON/OFF
SS
VREG5
N.C.
RDIV_SW
(Top View)
NJW4141VC3-T1
BLOCK DIAGRAM
V
+
UVLO
2.5V
Regulator
5V
Regulator
5V
Regulator
RDIV_SW
ON/OFF
High: ON
Low : OFF(Standby)
400k
Standby
ON/OFF
Internal Pow er
Supply
CT
VREG1.5
1.5V
Regulator
Vref
1V
OSC
VREG5
REG_DRV1
Error AMP
CLOCK
OSC
Driver 1
Over Current Sense 1
IN-
OUT1
FB
Max Duty
Setting
Soft Start
Setting
Digital
Phase
Shifter
PWM
Comparator
Pulse
by
Pulse
V
IPK
1
SENSE1
DTC
REG_DRV2
Driver 2
Over Current Sense 2
Pulse
by
Pulse
V
IPK
2
SS
OUT2
SENSE2
AGND
PGND
-2-
Ver.2016-02-22
Automotive NJW4141
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V
+
OUT pin Voltage (*1)
V
OUT
REG_DRV pin Voltage (*1)
V
REG_DRV
VREG1.5 pin Voltage
V
REG1.5
VREG5 pin Voltage
V
REG5
IN- pin Voltage
V
IN-
DTC pin Voltage
V
DTC
SENSE pin Voltage (*1)
V
SENSE
CT pin Voltage
V
CT
SS pin Voltage
V
SS
ON/OFF pin Voltage
V
ON/OFF
RDIV_SW pin Voltage
V
RDIV_SW
I
O_PEAK+
OUT pin Peak Current (1*)
I
O_PEAK-
Power Dissipation
Operating Temperature Range
Storage Temperature Range
P
D
T
opr
T
stg
MAXIMUM RATINGS
+45
-0.3 to +5.95 (*2)
-0.3 to +5.95 (*2)
+1.8 (*2)
+5.7 (*2)
+2.8 (*2)
+2.8 (*2)
+2.8 (*2)
+2.8 (*2)
+2.8 (*2)
+45
+45
1,000 (Source)
900 (Sink)
1,000 (*3)
1,500 (*4)
-40 to +125
-40 to +150
(Ta=25°C)
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
mA
mW
C
C
(*1): Common to each channel.
(*2): When Supply voltage is less than each absolute maximum voltage, the absolute maximum voltage is equal to the
Supply voltage.
(*3): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*4): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers),
internal Cu area: 74.2×74.2mm
RECOMMENDED OPERATING CONDITIONS (Ta= -40 C to +125 C)
PARAMETER
SYMBOL
MIN.
TYP.
Supply Voltage
V
+
3
－
Timing Capacitor
C
T
270
－
Oscillating Frequency
f
OSC
50
－
MAX.
40
3,300
500
UNIT
V
pF
kHz
Ver.2016-02-22
-3-
Automotive NJW4141
ELECTRICAL CHARACTERISTICS
PARAMETER
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Oscillator Block
Oscillating Frequency1
Oscillating Frequency2
Charge Current
Discharge Current
Voltage amplitude
Oscillating Frequency
deviation (Supply voltage)
Soft Start Block
Charge Current
(SS pin)
Threshold Voltage
(SS pin)
Threshold Voltage
(SS pin)
Error Amplifier Block
Reference Voltage
Input Bias Current
Open Loop Gain
Gain Bandwidth
Output Source Current
V
B
I
B
A
V
G
B
I
OM+
V
FB
=1V, V
IN-
=0.9V
V
FB
=1V, V
IN-
=0.9V,
Ta= -40 C to +125 C
V
FB
=1V, V
IN-
=1.1V
V
FB
=1V, V
IN-
=1.1V,
Ta= -40 C to +125 C
Ta= -40 C to +125 C
Ta= -40 C to +125 C
-1.0%
-2.0%
-0.1
-0.1
–
–
40
40
2
2
1.00
–
–
–
80
1.5
90
–
4
–
+1.0%
+2.0%
0.1
0.1
–
–
140
140
6
8
mA
V
A
dB
MHz
A
f
OSC1
f
OSC2
I
chg
I
dis
V
OSC
f
DV
V
+
=3V to 40V
C
T
=470pF
C
T
=470pF, Ta= -40 C to +125 C
C
T
=1,500pF
C
T
=1,500pF, Ta= -40 C to +125 C
Ta= -40 C to +125 C
Ta= -40 C to +125 C
270
260
90
80
150
140
150
140
–
–
300
–
100
–
200
–
200
–
0.7
3
330
330
110
120
250
260
250
260
–
–
kHz
kHz
A
A
V
%
V
T_ON
V
T_OFF
V
+
= L
→
H
V
+
= L
→
H, Ta= -40 C to +125 C
V
+
= H
→
L
V
+
= H
→
L, Ta= -40 C to +125 C
2.65
2.65
2.4
2.35
2.8
–
2.55
–
2.95
2.95
2.7
2.8
V
V
SYMBOL
(Unless otherwise noted, V
+
=V
ON/OFF
=12V, C
T
=470pF, Ta=25 C)
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
I
chg_SS
V
THSS0
V
THSS85
Ta= -40 C to +125 C
Duty1,2=0%
Duty1,2=0%, Ta= -40 C to +125 C
Duty1,2=80%
Duty1,2=80%, Ta= -40 C to +125 C
1.6
1.6
0.41
0.39
0.92
0.87
2
–
0.49
–
1.1
–
2.4
2.4
0.57
0.59
1.28
1.33
A
V
V
Output Sink Current
I
OM-
-4-
Ver.2016-02-22
Automotive NJW4141
ELECTRICAL CHARACTERISTICS
PARAMETER
PWM Comparate Block
M
AX
D
UTY90
Duty1,2 , V
FB
=1.2V, R
DTC
=100k
Duty1,2 , V
FB
=1.2V, R
DTC
=100k ,
Ta= -40 C to +125 C
Duty1,2 , V
FB
=1.2V, V
DTC
=0.715V
Duty1,2 , V
FB
=1.2V, V
DTC
=0.715V,
Ta= -40 C to +125 C
Duty1,2 , V
FB
=1.2V, V
DTC
=0.3V
Duty1,2 , V
FB
=1.2V, V
DTC
=0.3V,
Ta= -40 C to +125 C
80
80
40
40
–
–
90
–
50
–
–
–
95
95
60
60
0
0
%
%
%
SYMBOL
(Unless otherwise noted, V
+
=V
ON/OFF
=12V, C
T
=470pF, Ta=25 C)
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Maximum Duty Cycle
M
AX
D
UTY50
M
AX
D
UTY0
Phase Shift Block
V
FB
=0.7V, C
T
=1,500pF,
[ Definition: t
shift
/(t
OSC
/2) ]
V
FB
=0.7V, C
T
=1,500pF,
[ Definition: t
shift
/(t
OSC
/2) ]
Ta= -40 C to +125 C
Ta= -40 C to +125 C
-5.0%
-7.0%
4.8
4.7
1
–
5.1
–
+5.0%
–
+7.0%
5.4
5.5
V
Shift Time Ratio
Rt
shift
VREG5 pin Voltage
VREG Block
VREG1.5 pin Voltage
V
REG5
V
REG1.5
I
REG1.5
=300 A
I
REG1.5
=300 A, Ta= -40 C to +125 C
-2.0%
-4.0%
1.5
–
+2.0%
+4.0%
V
Current Limit Detection Block (common to SENSE1 and SENSE2)
Current Limit Detection
V
IPK
Voltage
Ta= -40 C to +125 C
Delay Time
t
DELAY
ΔV
SENSE1
=ΔV
SENSE2
=300mV
Output Block (common to OUT1 and OUT2)
I
O1, 2
= -50mA
Output High Level
R
OH
ON Resistance
I
O1, 2
= -50mA, Ta= -40 C to +125 C
I
O1, 2
= +50mA
Output Low Level
R
OL
ON Resistance
I
O1, 2
= +50mA, Ta= -40 C to +125 C
OUT1,2 pin=4.5V
Output Source Current
I
OH
OUT1,2 pin=4.5V,
Ta= -40 C to +125 C
REG_DRV pin Voltage
V
REG_DRV
Ta= -40 C to +125 C
90
90
–
110
–
190
130
130
–
mV
ns
–
–
45
40
5
5
2.0
–
3.0
–
70
–
5.3
–
3.0
4.0
4.0
5.0
105
105
5.6
5.75
mA
V
Ver.2016-02-22
-5-
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