NJM2392 PDF даташит
Спецификация NJM2392 изготовлена «NJR Corporation» и имеет функцию, называемую «PWM DC/DC Converter IC». |
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Детали детали
Номер произв | NJM2392 |
Описание | PWM DC/DC Converter IC |
Производители | NJR Corporation |
логотип |
9 Pages
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NJM2392
PWM DC/DC Converter IC
■GENERAL DESCRIPTION
The NJM2392 is a PWM DC/DC converter IC.
www.datasheet4u.com
It features fixed frequency type PWM control for better noise
handling and to avoid intermittent oscillation observed in a
simplified controller.
It is suitable for Step-Up, Step-Down and Inverting applications.
In addition, it contains a pulse-by-pulse current limit circuit
and can be set by an external resistance.
■PACKAGE OUTLINE
NJM2392D
NJM2392M
■FEATURES
● Operating Voltage
3.0V to 40V
● Wide Oscillator Frequency
1kHz to 150kHz
● Internal High Power Transistor 1.5A max.
● Internal Over Current Limit Circuit
● PWM switching control
● Bipolar Technology
● Package Outline
NJM2392D
: DIP8
NJM2392M
: DMP8
■PIN CONFIGURATION
■BLOCK DIAGRAM
1
8
PIN FUNCTION
1. CS
CS
1
2 7 2. ES
3. CT
1.5A
3 6 4. GND
5. IN-
160Ω
4
5 6. V+
ES 2
NJM2392D
7. SI
8. CD
OSC Block
MAX
NJM2392M
ON Duty
9:1
QR
PW M
Logic
S
Ipk Sense
300mV
8 CD
7 SI
CT 3
Vref
1.25V
Error AMP
6 V+
PWM COMP
GND 4
Buffer
5 IN-
Ver.2008-08-29
-1-
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NJM2392
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
Maximum Supply Voltage
Comparator Input Voltage
www.OdautatpshueteDt4ruiv.ceormVoltage
Output Switch Voltage
Output Driver Current
Output Switch Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
V+
VIR
VC(driver)
VSW
IC(driver)
ISW
PD
Topr
Tstg
MAXIMUM RATINGS
40
-0.3 ~ 40 (note)
40
40
100
1.5
DIP8
DMP8
875
580 (*1)
750 (*2)
-40 ~ +85
-50 ~ +150
UNIT
V
V
V
V
mA
A
mW
°C
°C
(note) When supply voltage is less than 40V, the absolute maximum input voltage is equal to the supply voltage.
(*1) At on PC board : 114.3mm × 76.2mm × 1.6mm(2 layer FR-4) : Conform to EIA/JEDEC
(*2) At on PC board :114.3mm × 76.2mm × 1.6mm(4 layer FR-4) : Conform to EIA/JEDEC
■POWER DISSIPATION vs. AMBIENT TEMPERATURE
Power Dissipation vs. Ambient Temperature
1000
(Topr=-40~+85oC, Tj= ~150oC)
DIP8
800
600
400
200
0
0
DMP8
At on 4 layer PC Board
At on 2 layer PC Board
25 50 75 100
Ambient Temperature Ta (oC)
-2-
Ver.2008-08-29
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NJM2392
■ELECTRICAL CHARACTERISTICS
DC Characteristics (V+=5V, Ta=25°C)
PARAMETER
www.datasheet4u.com
SYMBOL
TEST CONDITIONS
OSCILLATOR BLOCK
Oscillation Frequency
Charge Current
Discharge Current
Voltage Swing
Discharge to Charge
Current Ratio
fOSC
Ichg
Idis
VOSC
Iratio
IN-=0V, CT=1nF
CT=1nF
Ichg/Idis
CURRENT LIMIT
Peak Current
Sense Voltage
Vipk
OUTPUT SWITCH
Saturation Voltage 1
Saturation Voltage 2
Output Transistor
Bias Resistance
DC Voltage Gain
Collector Off-State Current
Vsat1
Vsat2
Rbias
hFE
IC(Off)
Darlington Connection
(CS=CD), ISW=0.7A
ISW=0.7A, IC(driver)=50mA
(Forced β≈14)
ISW=0.7A,VCE=5.0V
VCE=40V
ERROR AMPLIFIER
Threshold Voltage
Input Bias Current
Vth
IIB IN-=0V
GENERAL CHARACTERISTICS
Operating Current
ICC
CT=1nF, SI=V+, IN->Vth, ES=GND
MIN. TYP. MAX. UNIT
18 27 36 kHz
11 18 27 µA
110 180 300 µA
– 0.5 – VP-P
– 9 ––
250 300 350 mV
– 1.0 1.3 V
– 0.5 0.7 V
– 160 –
Ω
35 120
–
–
– 0.01 1 µA
1.225 1.250 1.275
– 300 900
V
nA
– 2.8 4.0 mA
(note) Output switch tests are performed under pulsed conditions to minimize power dissipation.
Ver.2008-08-29
-3-
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