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부품번호 | NJW4128 기능 |
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기능 | Switching Regulator IC | ||
제조업체 | New Japan Radio | ||
로고 | |||
전체 21 페이지수
NJW4128
Switching Regulator IC for Buck Converter
Current Mode Control w/ 40V/2.5A MOSFET
GENERAL DESCRIPTION
The NJW4128 is a buck converter with 40V/2.5A MOSFET. It
corresponds to high oscillating frequency, and Low ESR Output
Capacitor (MLCC) within wide input range from 4.5V to 40V.
Therefore, the NJW4128 can realize downsizing of applications
with a few external parts so that adopts current mode control.
Also, it has a soft start function, external clock synchronization,
over current protection and thermal shutdown circuit.
It is suitable for supplying power to a Car Accessory, Office
Automation Equipment, Industrial Instrument and so on.
■ PACKAGE OUTLINE
NJW4128GM1
FEATURES
Current Mode Control
External Clock Synchronization
Wide Operating Voltage Range 4.5V to 40V
Switching Current
3.6A min.
PWM Control
Built-in Compensation Circuit
Correspond to Ceramic Capacitor (MLCC)
http://www.DataSheet4U.net/
Oscillating Frequency
450kHz typ. (A ver.)
300kHz typ. (B ver.)
Soft Start Function
4ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection (Hiccup type)
Thermal Shutdown Protection
Power Good Function
Standby Function
Package Outline
NJW4128GM1 : HSOP8
PRODUCT CLASSFICATION
Part Number
Version
NJW4128GM1-A
NJW4128GM1-B
A
B
Oscillation
Frequency
450kHz typ.
300kHz typ.
Power Good
√
√
Package
HSOP8
HSOP8
Operating
Temperature
Range
-40°C to +85°C
-40°C to +85°C
Ver.2012-12-04
-1-
datasheet pdf - http://www.DataSheet4U.net/
NJW4128
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
(Unless otherwise noted, V+=VEN./SYNC=12V, Ta=25°C)
TEST CONDITION
MIN. TYP. MAX. UNIT
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
VT_ON
VT_OFF
VHYS
V+= L → H
V+= H → L
Soft Start Block
Soft Start Time
TSS VB=0.75V
Oscillator Block
Oscillation Frequency
Oscillation Frequency
deviation (Supply voltage)
Oscillation Frequency
deviation (Temperature)
fOSC
A version, VIN-=0.7V
B version, VIN-=0.7V
fDV V+=4.5V to 40V
fDT Ta=-40°C to +85°C
Error Amplifier Block
Reference Voltage
Input Bias Current
VB
IB
PWM Comparate Block
Maximum Duty Cycle
Minimum ON Time1
(Use Built-in Oscillator)
Minimum ON Time2
(Use Ext CLK)
MAXDUTY
tON-min1
tON-min2
VIN-=0.7V
A version
B version
http://www.DataSheet4U.net/
A version, fSYNC=500kHz
B version, fSYNC=400kHz
OCP Block
COOL DOWN Time
tCOOL
Output Block
Output ON Resistance
Switching Current Limit
SW Leak Current
RON
ILIM
ILEAK
ISW=2.5A
VEN/SYNC=0V, V+=45V, VSW=0V
4.2 4.4 4.5 V
4.1 4.3 4.4 V
70 90
– mV
2 4 8 ms
405 450 495 kHz
270 300 330 kHz
– 1 –%
– 5 –%
-1.0% 0.8 +1.0% V
-0.1 – +0.1 µA
88 92 – %
– 220 300 ns
– 250 340 ns
– 150 220 ns
– 170 250 ns
– 25 – ms
– 0.15 0.3 Ω
3.6 4.6 5.5 A
– – 4 µA
-4-
Ver.2012-12-04
datasheet pdf - http://www.DataSheet4U.net/
4페이지 NJW4128
TYPICAL CHARACTERISTICS (A, B version)
Reference Voltage vs. Supply Voltage
0.81 (Ta=25°C)
0.810
Reference Voltage vs. Temperature
(V+=12V)
0.805
0.805
0.8 0.800
0.795
0.795
0.79
0
10 20 30
Supply Voltage V+ (V)
40
Switching Current Limit vs. Temperature
6
5.5
5
V+=40V
4.5 V+=5V
4
V+=12V
3.5
3
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (°C)
0.790
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (°C)
Output ON Resistance vs. Temperature
(ISW=3A)
0.3
http://www.DataSheet4U.net/
0.25
0.2
V+=40V
V+=12V
0.15
0.1
0.05
V+=5V
0
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (°C)
Ver.2012-12-04
-7-
datasheet pdf - http://www.DataSheet4U.net/
7페이지 | |||
구 성 | 총 21 페이지수 | ||
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