NJU7680 PDF даташит
Спецификация NJU7680 изготовлена «NJR» и имеет функцию, называемую «2ch switching regulator IC». |
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Детали детали
Номер произв | NJU7680 |
Описание | 2ch switching regulator IC |
Производители | NJR |
логотип |
11 Pages
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NJU7680www.DataSheet4U.com
2ch switching regulator IC
■GENERAL DESCRIPTION
The NJU7680 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.
Each channel has an on/off switch. Therefore, the power
sequence can be activated externally.
Internal soft-start function, dead time control and timer latch
function are included, and those functions can be easily controlled
by external component.
■PACKAGE OUTLINE
NJU7680V
NJU7680SED
(U.D.)
■FEATURES
● Step-Down, Step-Up/SEPIC circuit
● PWM switching control
● Operating Voltage
2.3V to 7V
● Wide Oscillator Range
300kHz to 1MHz
● Soft-Start Function
Internal: 4ms typ. or adjustable
● Channel ON/OFF Function
● Standby Quiescent Current
1µA max.
● Dead Time Control
● Timer Latch for Short Circuit Protection
● C-MOS Technology
● Package Outline
NJU7680V
: SSOP16
NJU7680SED : PCSP24-ED (U.D.)
Ver.2010-03-31
-1-
No Preview Available ! |
NJU7680
www.DataSheet4U.com
■PIN CONFIGURATION
<SSOP16 package>
1
2
3
4
5
6
7
8
(Top View)
NJU7680V
16
15
14
13
12
11
10
9
PIN FUNCTION
1. SCP
2. CE1
3. CE2
4. FB2
5. IN-2
6. V+
7. DTC2
8. OUT2
9. OUT1
10. DTC1
11. GND
12. GND
13. RT
14. VREG
15. IN-1
16. FB1
<PCSP24-ED package>
18 17 16 15 14 13
19 12
20 11
21 10
22 9
23 8
24 7
1 2 3 45
6
13 14 15 16 17 18
12
11
PAD (*1)
PAD (*1)
10
9
PAD (*1)
PAD (*1)
8
7
19
20
21
22
23
24
654 321
(Top View)
(Bottom View)
NJU7680SED (U.D.)
(*1) The PAD is not connected to an IC chip electrically.
PIN FUNCTION
1. N.C.
2. FB2
3. IN-2
4. N.C.
5. V+
6. N.C.
7. DTC2
8. N.C.
9. OUT2
10. N.C.
11. OUT1
12. N.C.
13. DTC1
14. GND
15. GND
16. RT
17. VREG
18. N.C.
19. IN-1
20. FB1
21. N.C.
22. SCP
23. CE1
24. CE2
-2-
Ver.2010-03-31
No Preview Available ! |
■BLOCK DIAGRAM
SCP
FB1
IN-1
DTC1
FB2
IN-2
DTC2
NJU7680www.DataSheet4U.com
Vref
1V
1V
VREG
V+
V+
Regulator
UVLO
2V
2µA
RT_ON
2kΩ
1V
SCP
ON/OFF
CE1
CE2
ER⋅AMP1
SST1
DTC_COMP1
PWM1
Buffer1
CH1
OUT1
ER⋅AMP2
GND
SST2
DTC_COMP2
0.8V
0.2V
PWM2
Buffer2
OSC
0.5V
RT
RT
CH2
RT_ON
V+
RP
SW
OUT2
•On/Off Function
The On/Off switch for each channel is controlled by CE pin.
→ Setting the CE low will turn off all applicable channels’ circuit.
→ Turning off both channels will turn off all circuit.
→ Opening the RT pin will turn off all circuit regardless of input signals from CE pin.
Input Signal
RT CE1 CE2
HHH
HH L
HLH
HL L
L HH
LHL
L LH
LLL
Operating State
CH1 CH2
ON ON
ON OFF
OFF ON
OFF
Standby Mode
Ver.2010-03-31
-3-
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