NJM2375/A
POWER FACTOR CONTROLLER
■
GENERAL DESCRIPTION
The
NJM2375/A
are active power factor controllers, which limit
the harmonic current resulting from the power supply block of
electrical devices.
They include a startup timer, an one quadrant multiplier, a zero
current detector to ensure critical condition operation, a
transconductance error amplifier, high precision reference, a
current sensing comparator, and a totem pole output ideally suited
for driving a power MOSFET.
They also contain protection circuits for overvoltage,
cycle-by-cycle overcurrent, and maximum peak current.
The startup threshold of
NJM2375A
is lower than that of
NJM2375.
■
PACKAGE OUTLINE
NJM2375D/AD
NJM2375M/AM
NJM2375V/AV
■
FEATURES
●
Overvoltage Comparator Eliminates Runaway Output Voltage
●
Internal Quick Start
●
Internal Startup Timer
●
One Quadrant Multiplier
●
Zero Current Detector
●
High Precision Reference (±2%)
●
Totem Pole Output with High State Clamp
●
Undervoltage Lockout
(Startup Threshold/NJM2375:13V typ.,
NJM2375A:10.4V
typ.)
●
Low Startup and Operating Current
●
Bipolar Technology
●
Package Outline DIP8,DMP8,SSOP14,SIP8
NJM2375L/AL
■
PIN CONFIGURATION
PIN FUNCTION
1. V
FB
2. C
OMP
3. M
ULT
4. C
SENSE
5. D
ZERO
6. GND
7. DRIVE
8. V
+
NJM2375D/AD
NJM2375M/AM
NJM2375L/AL
PIN FUNCTION
1. M
ULT
2. NC
3. C
SENSE
4. NC
5. D
ZERO
6. NC
7. GND
NJM2375V/AV
8. DRIVE
9. NC
10. V
+
11. NC
12. V
FB
13. NC
14. C
OMP
Ver.2003-07-18
-1-
NJM2375/A
■
BLOCK DIAGRAM
■
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Total Power Supply and Zener Current
Output Current (Source or Sink)
(T
a
=25°C)
SYMBOL
I
CC
+I
Z
I
O
V
IN
I
IN
P
D
RATINGS
30
500
-1.0 to +10
UNIT
mA
mA
V
Current Sense, Multiplier, and Voltage Feedback Inputs
Zero Current Detect Input
High State Forward Current
Low state Forward Current
Power Dissipation
50
-10
(DIP8)
(DMP8)
(SIP8)
500
300
700
mA
mW
(SSOP14) 300
Operating Temperature Range
Storage Temperature Range
T
OPR
T
STG
-40 to +85
-50 to +150
°C
°C
-2-
Ver.2003-07-18
NJM2375/A
■
ELECTRICAL CHARACTERISTICS
(V
+
=12V*
1
, T
a
=25°C)
●
ERROR AMPLIFIER
PARAMETER
Voltage Feedback input Threshold 1
Voltage Feedback input Threshold 2
Line Regulation
Input Bias Current
Transconductance
Output Current (Source)
Output Current (Sink)
Output Voltage Swing 1
Output Voltage Swing 2
SYMBOL
V
FB1
V
FB2
RegLine
I
IB
gm
I
OSO
I
OSI
V
OH(ea)
V
OL(ea)
V
FB
=2.3V
V
FB
=2.7V
V
FB
=2.3V (High State)
V
FB
=2.7V (Low State)
V =12V
V =28V
V =12 to 28V
V
FB
=0V
+
+
+
TEST CONDITION
MIN.
2.465
2.440
-
-
80
-
-
5.8
-
TYP.
2.500
2.500
1.0
-0.1
100
10
10
6.4
1.7
MAX.
2.535
2.540
10
-0.5
130
-
-
-
2.4
UNIT
V
V
mV
µA
µmho
µA
µA
V
V
●
OVERVOLTAGE COMPARATOR
PARAMETER
Voltage Feedback
Input Threshold
SYMBOL
V
FB(0V)
TEST CONDITION
MIN.
1.065
×V
FB
TYP.
1.080
×V
FB
MAX.
1.095
×V
FB
UNIT
V
●
MULTIPLIER
PARAMETER
Input Bias Current
Input Threshold
Dynamic Input Voltage Range
SYMBOL
I
IB
V
th(M)
V
PIN3
V
PIN2
TEST CONDITION
V
FB
=0V(FB Pin)
(FB Pin)
Multiplier Input Pin
Compensation Pin
MIN.
-
1.05V
OL
×(EA)
0 to 2.5
V
th(M)
to
V
th(M)
+1.0V
0.43
TYP.
-0.1
1.20V
OL
×(EA)
0 to 3.5
V
th(M)
to
V
th(M)
+1.5V
0.65
MAX.
-0.5
-
-
-
UNIT
µA
V
V
V
Multiplier Gain*
2
K
Vmp=0.5V,
Vcomp=V
th(M)
+1.0V
0.87
µmho
●
ZERO CURRENT DETECTOR
PARAMETER
Input Threshold Voltage
Hysteressis
Input Clamp Voltage
SYMBOL
V
th
V
H
V
IH
V
IL
+
+
TEST CONDITION
V Increasing
V Decreasing
High State (I
DET
=+3.0mA)
Low State (I
DET
=-3.0mA)
MIN.
1.33
100
5.20
0.30
TYP.
1.60
200
5.80
0.70
MAX.
1.87
300
-
1.00
UNIT
V
mV
V
V
Ver.2003-07-18
-3-
NJM2375/A
■
ELECTRICAL CHARACTERISTICS
(V
+
=12V*
1
, T
a
=25°C)
●
CURRENT SENSING COMPARATOR
PARAMETER
Input Bias Current
Input Offset Voltage
Maximum Current Sense
3
Input Threshold *
Delay to Output
SYMBOL
I
IB
V
IO
V
th(MAX)
tPHL
TEST CONDITION
I
sence
=0V
V
compe
=1.10V, V
M
=0V
MIN.
-
-
1.30
-
TYP.
-0.15
9.0
1.50
200
MAX.
-1.0
25.0
1.80
-
UNIT
µA
mV
V
nS
●
DRIVE OUTPUT
PARAMETER
Output Voltage Low State
Output Voltage High State
Output Voltage High State
Output Voltage Rise Time
Output Voltage Fall Time
Output Voltage with UVLO Activated
SYMBOL
V
OL1
V
OL2
V
OH1
V
OH2
V
C(MAX)
tr
tf
V
C(UVLO)
TEST CONDITION
I
sink
=20mA
I
sink
=200mA
I
source
=20mA
I
source
=200mA
I
source
=20mA
+
CL=15pF, V =30V
CL=1.0nF
CL=1.0nF
V =7V, Isink=1.0mA
+
MIN.
-
-
9.8
7.8
14
-
-
-
TYP.
0.3
2.4
10.3
8.4
16
100
50
0.1
MAX.
0.8
3.3
-
-
18
150
120
0.5
UNIT
V
V
V
V
V
nS
nS
V
●
RESTART TIMER
PARAMETER
Restart Time Delay
SYMBOL
tDLY
TEST CONDITION
MIN.
200
TYP.
620
MAX.
-
UNIT
µS
-4-
Ver.2003-07-18
NJM2375/A
■
ELECTRICAL CHARACTERISTICS
(V
+
=12V*
1
, T
a
=25°C)
●
UNDERVOLTAGE LOCKOUT
PARAMETER
(NJM2375)
Startup Threshold
Minimum Operating
Voltage After Turn-On Hysteresis
(NJM2375A)
Startup Threshold
Minimum Operating
Voltage After Turn-On
Hysteresis
V
th(on)
V
shutdown
V
H
V Increasing
V Decreasing
+
+
SYMBOL
+
+
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
th(on)
V
shutdown
V
H
V Increasing
V Decreasing
11.5
7.0
3.8
9.4
6.8
1.4
13.0
8.0
5.0
10.4
7.8
2.6
14.5
9.0
6.2
11.4
8.8
3.8
V
V
V
V
V
V
●
TOTAL DEVICE
PARAMETER
Power Supply Current
Startup
Operating
Dynamic Operating
Power Supply Zener Voltage*
4
SYMBOL
+
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
I
CC1
I
CC2
I
CC3
V
Z
V =7.0V
50kHz, CL=1.0nF
I
CC
=25mA
-
-
-
30
0.25
6.5
9.0
36
0.4
12
20
-
mA
mA
mA
V
●
NOTES
*
1
: Adjust V
+
above the startup threshold before setting to 12V.
V
th(max)
*
2
: K=
V
M
×(V
comp
- V
th(M)
)
3
* : This parameter is measured with V
FB
=0V,and V
M
=3.0V.
*
4
: Do not supply higher voltage above the zener voltage to 8pin, because the internal zener diode protects the IC
from surge.
Ver.2003-07-18
-5-
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