NJM2375/A
-1-
Ver.2003-07-18
POWER FACTOR CONTROLLER
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
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.
■ 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
■ PIN CONFIGURATION
NJM2375D/AD NJM2375M/AM
NJM2375V/AV NJM2375L/AL
PIN FUNCTION
1. VFB
2. COMP
3. MULT
4. CSENSE
5. DZERO
6. GND
7. DRIVE
8. V+
PIN FUNCTION
1. MULT 8. DRIVE
2. NC 9. NC
3. CSENSE 10. V+
4. NC 11. NC
5. DZERO 12. VFB
6. NC 13. NC
7. GND 14. COMP
NJM2375V/AV
NJM2375L/AL
NJM2375D/AD
NJM2375M/AM
NJM2375/A
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■ BLOCK DIAGRAM
■ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Total Power Supply and Zener Current ICC+IZ 30 mA
Output Current (Source or Sink) IO 500 mA
Current Sense, Multiplier, and Voltage Feedback Inputs VIN -1.0 to +10 V
Zero Current Detect Input
High State Forward Current IIN 50 mA
Low state Forward Current -10
Power Dissipation PD (DIP8) 500 mW
(DMP8) 300
(SSOP14) 300
(SIP8) 700
Operating Temperature Range TOPR -40 to +85 °C
Storage Temperature Range TSTG -50 to +150 °C
NJM2375/A
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■ ELECTRICAL CHARACTERISTICS (V+=12V*1, Ta=25°C)
● ERROR AMPLIFIER
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Voltage Feedback input Threshold 1 VFB1 V
+=12V 2.465 2.500 2.535 V
Voltage Feedback input Threshold 2 VFB2 V
+=28V 2.440 2.500 2.540 V
Line Regulation RegLine V+=12 to 28V - 1.0 10 mV
Input Bias Current IIB V
FB=0V - -0.1 -0.5 µA
Transconductance gm 80 100 130 µmho
Output Current (Source) IOSO V
FB=2.3V - 10 - µA
Output Current (Sink) IOSI V
FB=2.7V - 10 - µA
Output Voltage Swing 1 VOH(ea) V
FB=2.3V (High State) 5.8 6.4 - V
Output Voltage Swing 2 VOL(ea) V
FB=2.7V (Low State) - 1.7 2.4 V
● OVERVOLTAGE COMPARATOR
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Voltage Feedback
Input Threshold
VFB(0V) 1.065
×VFB
1.080
×VFB
1.095
×VFB
V
● MULTIPLIER
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Input Bias Current IIB V
FB=0V(FB Pin) - -0.1 -0.5 µA
Input Threshold Vth(M) (FB Pin) 1.05VOL
×(EA)
1.20VOL
×(EA)
- V
Dynamic Input Voltage Range VPIN3 Multiplier Input Pin 0 to 2.5 0 to 3.5 - V
V
PIN2 Compensation Pin Vth(M)
to
Vth(M)
+1.0V
Vth(M)
to
Vth(M)
+1.5V
- V
Multiplier Gain*2 K Vmp=0.5V,
Vcomp=Vth(M)+1.0V
0.43 0.65 0.87 µmho
● ZERO CURRENT DETECTOR
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Input Threshold Voltage Vth V
+ Increasing 1.33 1.60 1.87 V
Hysteressis VH V
+ Decreasing 100 200 300 mV
Input Clamp Voltage VIH High State (IDET=+3.0mA) 5.20 5.80 - V
V
IL Low State (IDET=-3.0mA) 0.30 0.70 1.00 V
NJM2375/A
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■ ELECTRICAL CHARACTERISTICS (V+=12V*1, Ta=25°C)
● CURRENT SENSING COMPARATOR
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Input Bias Current IIB I
sence=0V - -0.15 -1.0 µA
Input Offset Voltage VIO V
compe=1.10V, VM=0V - 9.0 25.0 mV
Maximum Current Sense
Input Threshold *3Vth(MAX) 1.30 1.50 1.80 V
Delay to Output tPHL - 200 - nS
● DRIVE OUTPUT
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Output Voltage Low State VOL1 I
sink=20mA - 0.3 0.8 V
V
OL2 I
sink=200mA - 2.4 3.3 V
Output Voltage High State VOH1 I
source=20mA 9.8 10.3 - V
V
OH2 I
source=200mA 7.8 8.4 - V
Output Voltage High State VC(MAX) I
source=20mA
CL=15pF, V+=30V
14 16 18 V
Output Voltage Rise Time tr CL=1.0nF - 100 150 nS
Output Voltage Fall Time tf CL=1.0nF - 50 120 nS
Output Voltage with UVLO Activated VC(UVLO) V
+=7V, Isink=1.0mA - 0.1 0.5 V
● RESTART TIMER
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Restart Time Delay tDLY 200 620 - µS
NJM2375/A
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Ver.2003-07-18
■ ELECTRICAL CHARACTERISTICS (V+=12V*1, Ta=25°C)
● UNDERVOLTAGE LOCKOUT
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
(NJM2375)
Startup Threshold Vth(on) V
+ Increasing 11.5 13.0 14.5 V
Minimum Operating Vshutdown V
+ Decreasing 7.0 8.0 9.0 V
Voltage After Turn-On Hysteresis VH 3.8 5.0 6.2 V
(NJM2375A)
Startup Threshold Vth(on) V
+ Increasing 9.4 10.4 11.4 V
Minimum Operating
Voltage After Turn-On
Vshutdown V
+ Decreasing 6.8 7.8 8.8 V
Hysteresis VH 1.4 2.6 3.8 V
● TOTAL DEVICE
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Power Supply Current
Startup ICC1 V
+=7.0V - 0.25 0.4 mA
Operating ICC2 - 6.5 12 mA
Dynamic Operating ICC3 50kHz, CL=1.0nF - 9.0 20 mA
Power Supply Zener Voltage*4 V
Z I
CC=25mA 30 36 - V
● NOTES
*1 : Adjust V+ above the startup threshold before setting to 12V.
Vth(max)
*
2 : K= VM ×(Vcomp - Vth(M))
*3 : This parameter is measured with VFB=0V,and VM=3.0V.
*4 : Do not supply higher voltage above the zener voltage to 8pin, because the internal zener diode protects the IC
from surge.
NJM2375/A
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■ TYPICAL APPLICATIONS
NJM2375/A
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Ver.2003-07-18
(V+=12V,Ta=25℃)
0
2
4
6
8
10
12
0 0.1 0.2 0.3 0.4
Output Current Ｉｏ (A）
Output Voltage Vｏ （Ｖ）
VOL
VOH
(VFB=0V,CL=1nF,f=50kHz,Ta=25℃)
0
5
10
15
20
25
30
0 5 10 15 20 25 30 35 40
Supply Voltage Ｖ＋ （Ｖ）
Supply Current Ｉcc （ｍＡ）
(VFB=0V,CL=1nF,f=50kHz,Ta=25℃)
0
5
10
15
20
25
30
0 5 10 15 20 25 30 35 40
Supply Voltage Ｖ (V)
Supply Current Icc (mA)
Current Sense Input Threshold
vs. Multiplier Input (Expanded View)
Current Sense Input Threshold
vs. Multiplier Input
(V+=12V,Ta=25℃)
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
-0.2 -0.1 0 0.1 0.2
Multiplier Input Voltage ＶＭ （Ｖ）
Current Sense Threshold
ＶＣＳ （Ｖ）
PIN2=2. 5V
PIN2=3.75V
PIN2=3.5V
PIN2=3.0V
PIN2=3.25V
PIN2=2.75V
PIN2=2.25V
(V+=12V,Ta=25℃)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
-0.500.511.522.533.54
Multiplier Input Voltage ＶＭ (Ｖ）
Current Sense Threshold
ＶＣＳ （Ｖ）
PIN2=2.5V
PIN2=3.75V
PIN2=3.5V
PIN2=3.0V
PIN2=2.25V
PIN2=2.0V
PIN2=2.75V
PIN2=3.25V
■ TYPICAL CHARACTERISTICS
Supply Current vs. Supply Voltage (NJM2375) Supply Current vs. Supply Voltage (NJM2375A)
Drive Output Voltage vs. Output Current Drive Output Waveform
NJM2375/A
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- Ver.2003-07-18
Temperature
(V
12V)
2.46
2.48
2.5
2.52
2.54
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ｔａ （℃）
Voltage Feedback Threshold Change
Ｖ
Ｆ
（V）
1.2
1.3
1.4
1.5
1.6
1.7
1.8
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ｔａ （℃）
Threshold Voltage Ｖｔｈ （Ｖ）
Upper Thresh old （Ｖｉｎ,Increasing）
Lower Threshold （Ｖｉｎ,Decreasing）
6
8
10
12
14
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta (℃)
Supply Voltage V+ (V)
NJM2375
NJM2375
Startup Threshold（Ｖ＋,Increasing)
NJM2375A
NJM2375A
Minimum Opearting Threshold（Ｖ＋,Decreasing）
(V
+
=12V)
300
400
500
600
700
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ｔａ （℃）
Restart Timer Delay
ｔＤＬＡ （μＳ）
Quickstart
Charge
Voltage Current
vs.Temperature (V+=12V)
1.6
1.65
1.7
1.75
1.8
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ｔａ （℃）
200
300
400
500
600
Quickstart Charge Current Iｃｈｇ （μＡ）
Quickstart Charge Voltage Ｖｃｈｇ （Ｖ）
Current
Voltage
V
oltage Feedback Input Threshold Change
vs. Temperature (V+=12V)
Zero Current Detector Input Threshold Voltage vs.
Temperature (V+=12V)
(V+=12V)
105
106
107
108
109
110
-50 -25 0 25 50 75 100 125 150
Ambient Temperature Ta （℃）
Overvoltage Input Threshold
ＶＦＢ（０Ｖ） （％ＶＦＢ）
Quickstart Charge Voltage・Current
vs. Temperature (V+=12V)
■ TYPICAL CHARACTERISTICS
Overvoltage vs. Temperature
Restart Timer Deley vs. Temperature
Undervoltage Lockout Thresholds vs. Temperature
(uS
)
Voltage Feedback Input Threshold Change
VFB (V)
NJM2375/A
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Ver.2003-07-18
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
