NJU7678 Datasheet, PDF (1/9 Pages) New Japan Radio – Internal 60V, 3A MOSFET Step-Up / Flyback Switching Regulator IC

NJU7678
Internal 60V, 3A MOSFET Step-Up / Flyback Switching Regulator IC
GENERAL DESCRIPTION
NJU7678 is Step-up/Fly back type switching regulator IC with
PWM control. 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.
FEATURES
Drain to Source Voltage
60V max.
Drain to Source Current
3A max.
PWM switching control
Operating Voltage Range
2.5V to 7.0V
Oscillating Frequency Range
300kHz to 1MHz
Maximum Duty Cycle
90% typ.
Soft-Start Function
Internal fixed value: 4ms typ.
or adjustable by external part
Dead Time Control
Timer Latch for Short Circuit Protection
Package Outline
NJU7678MLK: EQFN24
■ PACKAGE OUTLINE
Bottom View
NJU7678MLK
■PIN CONFIGURATION
18 17 16 15 14 13
19
12
20
11
21
10
22
9
23
8
24
7
13 14 15 16 17 18
12
19
11
20
10
21
PAD (*1)
9
22
8
23
7
24
1 2 3 45
6
6
5
4
3
2
1
(Top View)
NJU7678MLK
(Bottom View)
PIN FUNCTION
1. FB
2. IN-
3. N.C.
4. SCP
5. N.C.
6. DTC
7. N.C.
8. RT
9. N.C.
10. GND
11. N.C.
12. N.C.
13. N.C.
14. SOURCE
15. SOURCE
16. SOURCE
17. SOURCE
18. N.C.
19. DRAIN
20. DRAIN
21. DRAIN
22. N.C.
23. V⁺
24. N.C.
(*1): Exposed Pad connected to Internal FET Drain
Ver.2010-10-26
-1-