Transcript
NJU7600 PWM control Step-Up / Flyback switching regulator IC ■GENERAL DESCRIPTION
■PACKAGE OUTLINE
The NJU7600 is a low voltage operation high-speed switching regulator control IC for PWM control step-up and fly-back converter. It incorporates a totem pole driver output, which can directly drive an external MOS-FET easily. The NJU7600 also has a soft-start function, dead time control and timer latch for short circuit protection and their times are all adjustable with external parts. It is available in 8-lead DMP, MSOP (TVSP) packages and 10-lead MSOP (TVSP) package. It is suitable for battery powered applications.
■FEATURES ● PWM switching control ● Operating Voltage 2.2V to 8V ● Wide Oscillator Range 300kHz to 1MHz ● Maximum Duty Cycle 90% typ. ● Quiescent Current 800µA typ. ● Soft-Start Function Internal : 16ms typ. or adjustable ● Dead Time Control ● Timer Latch for Short Circuit Protection ● C-MOS Technology ● Package Outline NJU7600M : DMP8 NJU7600RB1 : MSOP8 (TVSP8)* NJU7600RB2 : MSOP10 (TVSP10)*
NJU7600M (DMP8)
NJU7600RB1 (MSOP8 (TVSP8))
NJU7600RB2 (MSOP10(TVSP10)) ■PRODUCT VARIATION NJU7601
NJU7602
PWM/PFM Light Load to Efficiency
Standby Function Over Current Protection
NJU7600
NJU7610
PWM Control
Constant Current Control
NJU7620
*MEET JEDEC MO-187-DA / THIN TYPE
■PIN CONFIGURATION
1
8
2
7
3
6
4
5
NJU7600M NJU7600RB1
Ver.2012-08-03
PIN FUNCTION 1. V+ 2. FB 3. IN4. SCP 5. DTC 6. RT 7. GND 8. OUT
1
10
2
9
3
8
4
7
5
6
NJU7600RB2
PIN FUNCTION 1. V+ 2. N.C. 3. FB 4. IN5. SCP 6. DTC 7. RT 8. GND 9. GND 10. OUT
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NJU7600 ■BLOCK DIAGRAM +
V
NJU7600M NJU7600RB1
FB 0.8V
ER⋅AMP
IN1V
0.2V
Vref
Soft Start UVLO Latch PWM 2µA
SCP
Buffer
OUT
SCP OSC
2kΩ
0.5V
0.5 A RT
1V
0.74V
1V
DTC
RT
GND RT
V
NJU7600RB2
+
FB 0.8V
ER⋅AMP
IN1V
0.2V
Vref
Soft Start UVLO Latch PWM Buffer
2uA
SCP
OUT
SCP OSC 2kΩ
0.5V
1V
0.74V
0.5 A RT
N.C.
1V
DTC
RT
GND
GND
RT
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NJU7600 ■ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Supply Voltage V+ Output Pin Current IO Power Dissipation PD Operating Temperature Range Storage Temperature Range
MAXIMUM RATINGS +9 ±50 DMP8 : 300 MSOP8 (TVSP8) : 320 MSOP10 (TVSP10) : 320 -40 to +85 -40 to +125
TOPR TSTG
■RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Operating Voltage V+ Oscillator Timing Resistor RT Oscillation Frequency fOSC
MIN. 2.2 30 300
TYP. – 47 700
Under Voltage Lockout Block ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage Soft Start Block Soft Start Time Short Circuit Protection Block Input Threshold Voltage Charge Current Latch Mode ON Threshold Voltage Latch Mode OFF Threshold Voltage Oscillator Block RT Pin Voltage Oscillation Frequency Oscillate Supply Voltage Fluctuations Oscillate Temperature Fluctuations
Ver.2012-08-03
mW °C °C
MAX. 8 120 1,000
(Ta=25°C) UNIT V kΩ kHz
(V+=3.3V, RT=47kΩ, Ta=25°C)
■ELECTRICAL CHARACTERISTICS PARAMETER
(Ta=25°C) UNIT V mA
SYMBOL
VT_ON VT_OFF VHYS
TSS
TEST CONDITION
V+= L → H V+= H → L
VT_ON → Duty=80%
MIN.
TYP.
MAX.
UNIT
1.9 1.8 60
2.0 1.9 100
2.1 2.0 –
V V mV
8
16
24
ms
VT_PC ICHG
FB Pin VSCP=0V
0.95 1.5
1.00 2
1.05 2.5
V µA
VT_LA
SCP Pin
0.95
1.00
1.05
V
VT_LAOFF
SCP Pin
0.2
0.45
0.7
V
-5% 630
0.5 700
+5% 770
V kHz
VRT fOSC fDV
V+=2.2V to 8V
–
1
–
%
fDT
Ta=-40°C to +85°C
–
3
–
%
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NJU7600 (V+=3.3V, RT=47kΩ, Ta=25°C)
■ELECTRICAL CHARACTERISTICS PARAMETER Error Amplifier Block Reference Voltage Input Bias Current Open Loop Gain Gain Bandwidth Product Output Source Current Output Sink Current
SYMBOL
TEST CONDITION
VB IB AV GB IOM+_1 IOM+_2 IOM-
VFB=1V, VIN-=0.9V VFB=1V, VIN-=0.9V, V+=2.2V VFB=1V, VIN-=1.1V
MIN.
TYP.
MAX.
UNIT
-1.5% -0.1 – – 25 4 0.10
1.00 – 80 1 55 9 0.16
+1.5% 0.1 – – 95 16 0.22
V µA dB MHz mA mA mA
0.16 0.44 85 40
0.22 0.5 90 50
0.28 0.56 95 60
V V % %
PWM Comparate Block Input Threshold Voltage Maximum Duty Cycle Output Block Output High Level ON Resistance Output Low Level ON Resistance General Characteristics Quiescent Current
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VT_0 VT_50 MAXDUTY_1 MAXDUTY_2
Duty=0% Duty=50% VFB=0.9V VFB=0.9V, RDTC=47kΩ
ROH
IO=-20mA
–
10
20
Ω
ROL
IO=+20mA
–
5
10
Ω
RL=Non Load
–
800
1200
µA
IDD
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NJU7600 ■ TYPICAL APPLICATIONS Step-Up Converter SBD
L V
+
VOUT CIN
R2
NJU7600
C
+
1
V
OUT
8
2
FB
GND
7
3
IN-
RT
6
4
SCP
DTC
5
CNF
COUT
FET
R1
RT
RNF
CSCP
CS
RDTC
Flyback Converter V
T
+
SBD VOUT
CIN
NJU7600
C
CNF RNF
1
V
2
+
FET OUT
8
FB
GND
7
3
IN-
RT
6
4
SCP
DTC
5
COUT R1
RT
CSCP
Ver.2012-08-03
R2
RDTC
CS
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NJU7600 ■TYPICAL CHARACTERISTICS Oscillation Frequency vs. Timing Resistance 1000
(V+=3.3V, Ta=25oC)
100 Maximum Duty Cycle (%) M D
Oscillation Frequency fOSC (kHz)
Maximum Duty Cycle vs. Oscillator Frequency
(V+=3.3V, Ta=25oC)
90
AX
UTY_1
95
100 10
85 80 100
100 Timing Resistance RT (kΩ)
1000 Oscillator Frequency fOSC (kHz) Duty Cycle vs. R
DTC
Oscillation Frequency fosc (kHz)
Oscillation Frequency vs. Operating Voltage (RT=47kΩ, Ta=25oC)
720 700 680 660
(V =3.3V, R =47kΩ, Ta=25 C)
100 Duty Cycle MAXDUTY (%)
740
T
80 60 40 20 0
10
0 20 40 60 80 100 Dead Time Control Resistance RDTC (kΩ)
Reference Voltage vs. Operating Voltage
Quiescent Current vs. Operating Voltage
0
2 4 6 8 + Operating Voltage V (V)
o
(Ta=25 C) Quiescent Current IDD (µA)
1.002 1 0.998
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0
2 4 6 8 Operating Voltage V+ (V)
(R =47kΩ, R =Non Load, Ta=25oC) T
1400
B
Reference Voltage V (V)
1.004
0.996
o
+
10
L
1200 1000 800 600 400 200 0
0
2 4 6 8 Operating Voltage V+ (V)
10
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NJU7600 ■TYPICAL CHARACTERISTICS Error Amplifier Block Voltage Gain, Phase vs. Frequency + o (V =3.3V, Gain=40dB, Ta=25 C)
Gain 30
90
15
45
10 100 1000 Frequency f (kHz)
+
V =1.95V
8
Output Source Current IOM+ (mA)
V+=3.3V
6 4 V+=8V
2 0 -50
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
Error Amplifier Block Output Source Current vs. Temperature (VFB=1V, VIN-=0.9V) V+=8V
100 V+=3.3V 10 V+=1.95V 1 -50
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-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
0 10000
Output Block Output Low Level ON Resistance vs. Temperature (Io=+20mA)
12 10
10
1000
14
Output Sink Current IOM- (mA)
Output High Level ON Resistance ROH (Ω)
1
Output Block Output High Level ON Resistance vs. Temperature (Io=-20mA)
12
135
Phase
0 0.1
14
180
Phase Φ (deg)
45
Output Low Level ON Resistance ROL (Ω)
Voltage Gain Av (dB)
60
V+=1.95V
8 6
V+=3.3V
4 2 0 -50
0.2 0.15
V+=8V -25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
Error Amplifier Block Output Sink Current vs. Temperature (VFB=1V, VIN- =1.1V)
V+=1.95V, 3.3V, 8V
0.1 0.05 0 -50
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
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NJU7600 ■TYPICAL CHARACTERISTICS Reference Voltage vs. Temperature
Soft Start Time vs. Temperature
(V+=3.3V)
+
(V =3.3V)
24
Reference Voltage VB (V)
Soft Start Time Tss (ms)
22
1.005
20 18 16 14
1
0.995
12 10 8 -50
1.01
0.99 -50
-25 0 25 50 75 100 125 o Ambient Temperature Ta ( C)
Oscillator Frequency vs. Temperature
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
Muximum Duty Cycle vs. Temperature
+
80
700
60
660
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40 -50
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
VT_ON
VT_OFF
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Quiescent Current vs. Temperature
Under Voltage Lockout Block vs. Temperature
1.94
1.86 -50
MAX DUTY_2
50
2.02
1.9
MAX DUTY_1
70
680
1.98
(V+=3.3V)
90
720
640 -50
100 Muximum Duty Cycle MAX DUTY (%)
740
2.06 Threshold Voltage (V)
(V =3.3V, RT=47kΩ)
1000 Quiescent Current IDD (µA)
Oscillator Frequency fOSC (kHz)
760
(V+=3.3V, RT=47kΩ)
800 600 400 200 0 -50
-25 0 25 50 75 100 125 Ambient Temperature Ta (oC)
Ver.2012-08-03
NJU7600 MEMO
[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.
Ver.2012-08-03
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