NJM2382
SWITCHING REGULATOR CONTROL IC FOR FLYBACK
WITH CURRENT SENSE AMPLIFIER
GENERAL DESCRIPTION
The
NJM2382
is a low voltage operation switching regulator
control IC.
It features totem pole output directly driving external bipolar
transistor and operates at high switching frequency which improves
transient response. In addition, low power standby function is
incorporated.
It is suitable for LCD back light, and other portable applications.
PACKAGE OUTLINE
NJM2382M
FEATURES
PWM switching control
Operating Voltage
Wide Oscillator Range
ON/OFF Circuit
Current Sensing Amplifier
Soft-Start Function
UVLO(Under Voltage Lockouts)
Bipolar Technology
Package Outline
NJM2382V
(3.6 to 32V)
(5 to 350 kHz)
(High Active)
DMP14, SSOP10
PIN CONFIGURATION
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PIN FUNCTION
8.NC
1.NC
-
9. V
+
2.IN 1
3.IN
-
2
10.CS
11.CT
4.F.B
12.REF
5.GND
13.ON/OFF
6.OUT
14.NC
7.NC
NJM2382M
PIN FUNCTION
6. V
+
1.IN
-
1
2.IN
-
2
7.CS
8.CT
3.F.B
9.REF
4.GND
10.ON/OFF
5.OUT
1
2
3
4
5
10
9
8
7
6
NJM2382V
Ver.2012-07-26
-1-
NJM2382
BLOCK DIAGRAM
NC
14
ON/OFF
13
REF
12
CT
11
CS
10
V
+
NC
8
9
ON/OFF
“High” Active
CURRENT
SENSE AMP
V
REF
OSC
L.O
U.V.LO
500Ω
ER·AMP
0.52V
PWM
1
NC
2
IN 1
-
3
IN 2
-
4
F.B
5
GND
6
OUT
7
NC
(Package: DMP14)
IN
+
10
REF
9
CT
8
CS
7
V
+
6
V
REF
CURRENT
SENSE AMP
OSC
L.O
U.V.LO
500Ω
0.52V
ER·AMP
PWM
1
IN 1
-
2
IN 2
-
3
F.B
4
GND
5
OUT
(Package: SSOP10)
-2-
Ver.2012-07-26
NJM2382
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
Input Voltage
V
+
Reference Output Current
I
OR
Output Current
I
O
Differential Input Voltage
V
ID
Common Mode Input Voltage
V
IC
ON/OFF Control Voltage
V
ON/OFF
Power Dissipation
P
D
Operating Temperature Range
Storage Temperature Range
T
OPR
T
STG
MAXIMUM RATINGS
36
10
±50
2.5
-0.3
∼
2.5
-0.3
∼
36 (note)
(DMP 14) 300
(SSOP 10) 250
-40
∼
+85
-50
∼
+150
UNIT
V
mA
mA
V
V
V
mW
°C
°C
(note) When the supply voltage is less than 36V, the absolute maximum input voltage is equal to the supply voltage.
ELECTRICAL CHARACTERISTICS (V
+
=6V,R
T
=33kΩ,C
T
=1000pF,V
ON/OFF
=3V,Ta=25°C)
REFERENCE VOLTAGE BLOCK
PARAMETER
SYMBOL
Output Voltage
Line Regulation
Load Regulation
OSCILLATOR BLOCK
PARAMETER
Oscillation Frequency
Oscillate Fluctuations1
(Line Fluctuations)
Oscillate Fluctuations2
(Temp Fluctuations)
V
REF
L
INE
L
OAD
TEST CONDITION
I
OR
=1mA
V
+
=3.6
∼
32V, I
OR
=1mA
I
OR
=0.1
∼
5.0mA
MIN.
2.45
–
–
TYP.
2.50
6.8
5
MAX.
2.55
20.7
30
UNIT
V
mV
mV
SYMBOL
f
OSC
f
dV
f
dT
TEST CONDITION
R
T
=33kΩ, C
T
=1000pF
V
+
=3.6
∼
32V
Ta=-40
∼
85°C
MIN.
85
–
–
TYP.
105
1
5
MAX.
125
–
–
UNIT
kHz
%
%
CURRENT SENSE AMPLIFIER BLOCK
PARAMETER
SYMBOL
Input Offset Voltage1
Input Offset Current1
Input Bias Current1
Open Loop Gain1
Gain Bandwidth Product1
Input Common Mode
Voltage Ratio1
Maximum Output Voltage1
(F.B Pin)
Maximum Source Current1
(F.B Pin)
V
IO
1
I
IO
1
I
B
1
A
V
1
G
B
1
V
ICM
1
V
OM-
1
I
OM+
1
TEST CONDITION
MIN.
–
–
–
–
–
–
TYP.
2
5
20
90
0.6
0
∼
V
REF
-0.8
–
85
MAX.
7
–
100
–
–
–
1
200
UNIT
mV
nA
nA
dB
MHz
V
V
µA
R
NF
=100kΩ
V
OM
=0.5V
–
40
Ver.2012-07-26
-3-
NJM2382
ELECTRICAL CHARACTERISTICS (V
+
=6V,R
T
=33kΩ,C
T
=1000pF,V
ON/OFF
=3V,Ta=25°C)
ERROR AMPLIFIER BLOCK
PARAMETER
Reference Voltage2
Input Bias Current2
Open Loop Gain2
Gain Bandwidth Product2
Maximum Output Voltage2
(F.B Pin)
Maximum Source Current2
(F.B Pin)
PWM COMPARATE BLOCK
PARAMETER
Input Threshold Voltage
(F.B Pin)
Input Threshold Voltage
(F.B Pin)
Maximum Duty Cycle
SYMBOL
V
B
2
I
B
2
A
V
2
G
B
2
V
OM-
2
I
OM+
2
TEST CONDITION
MIN.
0.51
–
–
–
–
40
TYP.
0.52
5
90
0.6
–
85
MAX.
0.53
100
–
–
1
200
UNIT
V
nA
dB
MHz
V
µA
R
NF
=100kΩ
V
OM
=0.5V
SYMBOL
V
TH0
V
TH50
αM
TEST CONDITION
duty·cycle=0%
duty·cycle=50%
Current Sense Amp.=HIGH
Error Amp.=HIGH ,CS Pin=1.2V
MIN.
–
–
55
TYP.
1.65
1.88
64
MAX.
1.75
–
85
UNIT
V
V
%
SOFT START CIRCUIT BLOCK
PARAMETER
SYMBOL
Input Bias Current
(CS Pin)
Input Threshold Voltage
(CS Pin)
Input Threshold Voltage
(CS Pin)
I
BCS
V
THCS0
V
THCS50
TEST CONDITION
CS Pin=1.8V
duty·cycle=0%
duty·cycle=50%
MIN.
–
–
–
TYP.
250
0.25
0.52
MAX.
650
0.35
–
UNIT
nA
V
V
UNDER VOLTAGE LOCKOUT BLOCK
PARAMETER
SYMBOL
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
OUTPUT BLOCK
PARAMETER
H-Output Voltage (OUT Pin)
L-Output Voltage (OUT Pin)
Output Source Current
(OUT Pin)
V
THON
V
THOFF
V
HYS
TEST CONDITION
MIN.
–
–
60
TYP.
2.70
2.52
180
MAX.
–
–
–
UNIT
V
V
mV
SYMBOL
V
OH
V
OL
I
SOURCE
TEST CONDITION
R
L
=10kΩ
Output Sink Current=20mA
OUT Pin=0V
MIN.
3.50
–
8
TYP.
4.00
0.25
11
MAX.
–
0.65
–
UNIT
V
V
mA
-4-
Ver.2012-07-26
NJM2382
ELECTRICAL CHARACTERISTICS (V
+
=6V,R
T
=33kΩ,C
T
=1000pF,V
ON/OFF
=3V,Ta=25°C)
ON/OFF BLOCK
PARAMETER
OFF Threshold Voltage
(ON/OFF Pin)
ON Threshold Voltage
(ON/OFF Pin)
Input Bias Current
(ON/OFF Pin)
SYMBOL
V
OFF
V
ON
I
ON/OFF
TEST CONDITION
MIN.
–
1.1
TYP.
–
–
100
MAX.
0.3
–
120
UNIT
V
V
µA
V
ON/OFF
=3V
–
GENERAL CHARACTERISTICS
PARAMETER
SYMBOL
Standby Current
Latch Mode
Threshold Voltage (CS Pin)
Quiescent Current
Average Quiescent Current
I
CCSTBY
V
THLA
I
CCLA
I
CCAV
TEST CONDITION
Standby Mode, V
ON/OFF
=0V
MIN.
–
1.2
–
–
TYP.
12
1.5
1.6
3.5
MAX.
20
1.8
2.2
4.8
UNIT
µA
V
mA
mA
Latch Mode
RL=
, duty·cycle=50%
TYPICAL APPLICATIONS
V
330kΩ
ON/OFF
CONTROL
2.50V
36kΩ
1000pF
4.7µF
180kΩ
+
10
9
8
7
6
V
OUT
ON/OFF
“High” Active
CURRENT
SENSE AMP
V
REF
OSC
L.O
U.V.LO
500Ω
0.52V
ER·AMP
PWM
GND
1
2
3
4
5
(Package:SSOP10)
Ver.2012-07-26
-5-
医疗电子
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
