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PDF NJW4141 Data sheet ( Hoja de datos )
| Número de pieza | NJW4141 | |
| Descripción | 2-phase Boost Converter Switching Regulator IC | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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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-
1 page  
Automotive NJW4141
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
(Unless otherwise noted, V+=VON/OFF=12V, CT=470pF, Ta=25 C)
TEST CONDITION
MIN. TYP. MAX. UNIT
PWM Comparate Block
Duty1,2 , VFB=1.2V, RDTC=100k
80 90 95
MAXDUTY90 Duty1,2 , VFB=1.2V, RDTC=100k ,
Ta= -40 C to +125 C
80
–
95 %
Maximum Duty Cycle
Duty1,2 , VFB=1.2V, VDTC=0.715V 40 50 60
MAXDUTY50 Duty1,2 , VFB=1.2V, VDTC=0.715V,
Ta= -40 C to +125 C
40
–
60 %
MAXDUTY0
Duty1,2 , VFB=1.2V, VDTC=0.3V
Duty1,2 , VFB=1.2V, VDTC=0.3V,
Ta= -40 C to +125 C
––0
– – 0%
Phase Shift Block
Shift Time Ratio
VREG5 pin Voltage
Rtshift
VREG5
VFB=0.7V, CT=1,500pF,
[ Definition: tshift/(tOSC/2) ]
VFB=0.7V, CT=1,500pF,
[ Definition: tshift/(tOSC/2) ]
Ta= -40 C to +125 C
Ta= -40 C to +125 C
-5.0% 1 +5.0%
–
-7.0% – +7.0%
4.8
4.7
5.1
–
5.4
5.5
V
VREG Block
VREG1.5 pin Voltage
VREG1.5
IREG1.5=300 A
-2.0%
IREG1.5=300 A, Ta= -40 C to +125 C -4.0%
1.5
–
+2.0%
+4.0%
V
Current Limit Detection Block (common to SENSE1 and SENSE2)
Current Limit Detection
Voltage
Delay Time
VIPK
tDELAY
Ta= -40 C to +125 C
ΔVSENSE1=ΔVSENSE2=300mV
Output Block (common to OUT1 and OUT2)
Output High Level
ON Resistance
Output Low Level
ON Resistance
ROH
IO1, 2= -50mA
IO1, 2= -50mA, Ta= -40 C to +125 C
ROL
IO1, 2= +50mA
IO1, 2= +50mA, Ta= -40 C to +125 C
OUT1,2 pin=4.5V
Output Source Current
IOH OUT1,2 pin=4.5V,
Ta= -40 C to +125 C
REG_DRV pin Voltage
VREG_DRV Ta= -40 C to +125 C
90
90
–
–
–
45
40
5
5
110
–
130
130
mV
190 – ns
2.0 3.0
– 4.0
3.0 4.0
– 5.0
70 105
– 105 mA
5.3
–
5.6
5.75
V
Ver.2016-02-22
-5-
5 Page 
TYPICAL CHARACTERISTICS
Oscillating Frequency 1 vs. Temperature
330 (V+=12V, CT=470pF)
320
310
300
290
280
270
260
-50 -25
0 25 50 75 100 125 150
Temperature : (ºC)
Reference Voltage vs. Temperature
1.01
(V+=12V)
1.005
1
0.995
0.99
-50 -25
0 25 50 75 100 125 150
Temperature : (°C)
REG_DRV pin Voltage vs. Temperature
(V+=12V)
12
10
8
6
4
2
0
-50 -25
0 25 50 75 100 125 150
Temperature : (°C)
Ver.2016-02-22
Automotive NJW4141
Oscillating Frequency 2 vs. Temperature
120 (V+=12V, CT=1,500pF)
115
110
105
100
95
90
85
80
-50 -25
0 25 50 75 100 125 150
Temperature : (°C)
Current Limit Detection Voltage vs. Temperature
(V+=12V)
130
125
120
115
110
105
100
95
90
-50 -25
0 25 50 75 100 125 150
Temperature : (°C)
- 11 -
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NJW4141.PDF ] | |
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