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Электронный компонент: NJU7600M

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NJU7600
- 1 -
Ver.2005-03-01
PWM control Step-Up / Flyback switching regulator IC
GENERAL DESCRIPTION
PACKAGE OUTLINE










FEATURES
PRODUCT VARIATION
PWM switching control
Operating Voltage
2.2V to 8V
Wide Oscillator Range 300kHz to 1MHz
Maximum Duty Cycle
90% typ.
Quiescent Current
800
A 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
* Under Development
NJU7600RB1 : TVSP8



PIN CONFIGURATION









NJU7600
is a high speed low voltage operation switching
regulator control IC. It features a totem pole driver that can directly
drive an external MOS-FET.
Internal soft-start function, Dead time control and timer latch
function are included, requiring no external components. All
parameters can be optimized by additional external components for
design flexibility.
NJU7600M
NJU7600RB1
PIN FUNCTION
1. V
+
2. FB
3. IN-
4. SCP
5. DTC
6. RT
7. GND
8. OUT
NJU7600M
NJU7600RB1
1 8
2 7
3 6
4 5
Over Current Protection
NJU7600
Standby Function
NJU7602*
NJU7601*
NJU7610*
PWM Control
PWM/PFM
Light Load to
Efficiency
NJU7600
- 2 -
Ver.2005-03-01

BLOCK DIAGRAM
Buffer
0.74V
0.5V
OSC
1V
0.5
R
T
A
2k
2uA
UVLO
Soft Start
Vref
1V
1V
0.8V
0.2V
OUT
GND
RT
DTC
SCP
IN-
FB
V
+
PWM
SCP
ER
AMP
Latch
NJU7600
- 3 -
Ver.2005-03-01

ABSOLUTE MAXIMUM RATINGS (Ta=25C)
PARAMETER SYMBOL
MAXIMUM
RATINGS UNIT
Supply Voltage
V
+
+9
V
Output Pin Current
I
O
50
mA
Power Dissipation
P
D
DMP8 :300
TVSP8 :320
mW
Operating Temperature Range
T
OPR
-40 ~ +85
C
Storage Temperature Range
T
STG
-40 ~ +125
C


RECOMMENDED OPERATING CONDITIONS (Ta=25C)
PARAMETER SYMBOL
MIN.
TYP.
MAX.
UNIT
Operating Voltage
V
+
2.2 8 V
Oscillator Timing Resistor
R
T
30 47 120 k
Oscillation Frequency
f
OSC
300 700 1,000 kHz


ELECTRICAL CHARACTERISTICS (V
+
=3.3V, R
T
=47k, Ta=25C)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT

Under Voltage Lockout Block
ON Threshold Voltage
V
T_ON
V
+
= L H
1.9
2.0
2.1
V
OFF Threshold Voltage
V
T_OFF
V
+
= H L
1.8
1.9
2.0
V
Hysteresis Voltage
V
HYS
60 100
mV

Soft Start Block
Soft Start Time
T
SS
V
T_ON
Duty=80%
8
16
24
ms

Short Circuit Protection Block
Input Threshold Voltage
V
T_PC
FB
Pin
0.95 1.00 1.05 V
Charge Current
I
CHG
V
SCP
=0V 1.5
2
2.5
A
Latch Mode
ON Threshold Voltage
V
T_LA
SCP
Pin
0.95 1.00 1.05 V
Latch Mode
OFF Threshold Voltage
V
T_LAOFF
SCP
Pin
0.2
0.45
0.7
V

Oscillator Block
RT Pin Voltage
V
RT
-5% 0.5 +5% V
Oscillation Frequency
f
OSC
630 700 770 kHz
Oscillate Supply Voltage
Fluctuations
f
DV
V
+
=2.2V ~ 8V
1
%
Oscillate Temperature
Fluctuations
f
DT
Ta=-40
C ~ +85
C
3
%
NJU7600
- 4 -
Ver.2005-03-01

ELECTRICAL CHARACTERISTICS (V
+
=3.3V, R
T
=47k, Ta=25C)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT

Error Amplifier Block
Reference Voltage
V
B
-1.5% 1.00
+1.5%
V
Input Bias Current
I
B
-0.1 0.1
A
Open Loop Gain
A
V
80 dB
Gain Bandwidth Product
G
B
1
MHz
I
OM+_1
V
FB
=1V, V
IN-
=0.9V 25
55
95
mA
Output Source Current
I
OM+_2
V
FB
=1V, V
IN-
=0.9V, V
+
=2.2V 4 9 16 mA
Output Sink Current
I
OM-
V
FB
=1V, V
IN-
=1.1V 0.10
0.16
0.22
mA

PWM Comparate Block
V
T_0
Duty=0%
0.16 0.22 0.28 V
Input Threshold Voltage
V
T_50
Duty=50%
0.44 0.5 0.56 V
M
AX
D
UTY_1
V
FB
=0.9V 85
90
95
%
Maximum Duty Cycle
M
AX
D
UTY_2
V
FB
=0.9V, R
DTC
=47k 40
50
60
%

Output Block
Output High Level
ON Resistance
R
OH
I
O
=-20mA
10
20
Output Low Level
ON Resistance
R
OL
I
O
=+20mA
5
10

General Characteristics
Quiescent Current
I
DD
R
L
=Non Load
800
1200
A
NJU7600
- 5 -
Ver.2005-03-01

TYPICAL APPLICATIONS


Step-Up Converter
SCP
V
+
V
OUT
C
SCP

1
C
IN
FET
R2
SBD
R1
C
OUT
L
C
NF
R
NF
2
3
4
5
6
7
8
R
DTC

C
S

IN-
FB
V
+
DTC
RT
GND
OUT
R
T
C
NJU7600
Flyback Converter
SCP
V
+
V
OUT
C
SCP

1
C
IN
FET
R2
SBD
R1
C
OUT
T
C
NF

R
NF
2
3
4 5
6
7
8
R
DTC

C
S

IN-
FB
V
+
DTC
RT
GND
OUT
R
T
C
NJU7600
NJU7600
- 6 -
Ver.2005-03-01

TYPICAL CHARACTERISTICS
100
1000
10
100
O
s
c
i
l
l
ation F
r
eque
nc
y
f
OS
C
(k
H
z
)
Oscillation Frequency vs. Timing Resistance
(V
+
=3.3V, Ta=25
o
C)
Timing Resistance R
T
(k
)
80
85
90
95
100
100
1000
M
a
x
i
m
u
m
D
u
ty

C
y
c
l
e
M
AX
D
UT
Y
_
1
(%
)
Maximum Duty Cycle vs. Oscillator Frequency
(V
+
=3.3V, Ta=25
o
C)
Oscillator Frequency f
OSC
(kHz)
660
680
700
720
740
0
2
4
6
8
10
O
s
c
i
l
l
a
t
i
on F
r
equ
enc
y
f
o
sc


(
k
Hz
)
Operating Voltage V
+
(V)
Oscillation Frequency vs. Operating Voltage
(R
T
=47k
, Ta=25
o
C)
0
20
40
60
80
100
0
20
40
60
80
100
Du
t
y
Cy
c
l
e


M
AX
D
UT
Y
(%
)
Dead Time Control Resistance R
DTC
(k
)
Duty Cycle vs. R
DTC
(V
+
=3.3V, R
T
=47k
, Ta=25
o
C)
0.996
0.998
1
1.002
1.004
0
2
4
6
8
10
Re
f
e
r
enc
e V
o
lt
ag
e
V
B
(V
)
Operating Voltage V
+
(V)
Reference Voltage vs. Operating Voltage
(V
+
=3.3V, Ta=25
o
C)
0
200
400
600
800
1000
1200
1400
0
2
4
6
8
10
Q
u
i
e
s
c
ent
Cu
r
r
ent
I
DD
(u
A
)
Operating Voltage V
+
(V)
Quiescent Current vs. Operating Voltage
(R
T
=47k
, R
L
=Non Load, Ta=25
o
C)
NJU7600
- 7 -
Ver.2005-03-01

TYPICAL CHARACTERISTICS
(V
+
=3.3V, Gain=40dB, Ta=25
o
C)
0
15
30
45
60
0
45
90
135
180
0.1
1
10
100
1000
10000
Error Amplifier Block
Voltage Gain, Phase vs. Frequency
Pha
s
e
(d
e
g
)
Frequency f (kHz)
V
o
l
t
ag
e Gain


A
v

(
d
B
)
Phase
Gain
0
2
4
6
8
10
12
14
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
O
u
t
p
ut

H
i
gh
Le
v
e
l O
N

R
e
s
i
s
t
a
n
c
e
R
OH
(
)
Output Block
Output High Level ON Resistance
vs. Temperature (Io=-20mA)
V
+
=3.3V
V
+
=1.95V
V
+
=8V
0
2
4
6
8
10
12
14
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
O
u
t
p
ut
L
o
w

Le
v
e
l O
N

R
e
s
i
s
t
an
c
e
R
OL
(
)
Output Block
Output Low Level ON Resistance
vs. Temperature (Io=+20mA)
V
+
=3.3V
V
+
=1.95V
V
+
=8V
1
10
100
1000
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
O
u
t
p
ut
S
o
ur
c
e

C
u
rr
en
t


I
OM
+
(m
A
)
Error Amplifier Block
Output Source Current vs. Temperature
(V
FB
=1V, V
IN-
=0.9V)
V
+
=3.3V
V
+
=1.95V
V
+
=8V
0
0.05
0.1
0.15
0.2
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
Ou
tp
u
t

S
i
n
k
C
u
r
r
e
n
t I
OM
-
(m
A
)
Error Amplifier Block
Output Sink Current vs. Temperature
(V
FB
=1V, V
IN-
=1.1V)
V
+
=1.95V, 3.3V, 8V
NJU7600
- 8 -
Ver.2005-03-01
TYPICAL CHARACTERISTICS
8
10
12
14
16
18
20
22
24
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
So
f
t

S
t
a
r
t
T
i
me

T
ss (
m
s)
Soft Start Time vs. Temperature
(V
+
=3.3V)
0.99
0.995
1
1.005
1.01
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
Ref
e
r
ence V
o
lt
ag
e
V
B
(V
)
Reference Voltage vs. Temperature
(V
+
=3.3V)
640
660
680
700
720
740
760
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
O
s
c
i
l
l
at
or
Fr
eq
uency
f
OS
C
(k
H
z
)
Oscillator Frequency vs. Temperature
(V
+
=3.3V, R
T
=47k
)
40
50
60
70
80
90
100
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
Mu
xi
m
u
m
D
u
t
y

C
y
cl
e
M
AX
D
UT
Y
(%
)
Muximum Duty Cycle vs. Temperature
(V
+
=3.3V)
M
AX
D
UTY_1
M
AX
D
UTY_2
1.86
1.9
1.94
1.98
2.02
2.06
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
T
h
r
e
s
hold
V
o
lt
age
(
V
)
Under Voltage Lockout Block
vs. Temperature
V
T_OFF
V
T_ON
0
200
400
600
800
1000
-50
-25
0
25
50
75
100 125
Ambient Temperature
Ta (
o
C)
Q
u
i
e
s
c
en
t
C
u
r
r
en
t
I
DD
(u
A
)
Quiescent Current vs. Temperature
(V
+
=3.3V, R
T
=47k
)
NJU7600
- 9 -
Ver.2005-03-01
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.