Техническая Спецификация для On Semiconductor NCP5030 Evaluation Board NCP5030MTTXGEVB NCP5030MTTXGEVB NCP5030MTTXGEVB
Модели
NCP5030MTTXGEVB
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 2
1
Publication Order Number:
NCP5030/D
NCP5030
Buck-Boost Converter
to Drive a Single LED from 1
Li-Ion or 3 Alkaline
Batteries
The NCP5030 is a fixed frequency PWM buck−boost converter
optimized for constant current applications such as driving
high−powered white LED. The buck−boost is implemented in an
H−bridge topology and has an adaptive architecture where it operates
in one of three modes: boost, buck−boost, or buck depending on the
input and output voltage condition. This device has been designed
with high−efficiency for use in portable applications and is capable
of driving in DC up to 900 mA into a high power LED for flashlight /
torch applications. To protect the device cycle−by−cycle current
limiting and a thermal shutdown circuit have been incorporated as
well as output over−voltage protection. The 700 kHz switching
frequency allows the use of a low value 4.7
high−powered white LED. The buck−boost is implemented in an
H−bridge topology and has an adaptive architecture where it operates
in one of three modes: boost, buck−boost, or buck depending on the
input and output voltage condition. This device has been designed
with high−efficiency for use in portable applications and is capable
of driving in DC up to 900 mA into a high power LED for flashlight /
torch applications. To protect the device cycle−by−cycle current
limiting and a thermal shutdown circuit have been incorporated as
well as output over−voltage protection. The 700 kHz switching
frequency allows the use of a low value 4.7
mH and ceramic
capacitors. The NCP5030 is housed in a low profile space efficient
3x4 mm thermally enhanced WDFN.
3x4 mm thermally enhanced WDFN.
Features
•
Efficiency: 87% at 500 mA and 3.3 V V
IN
•
Internal Synchronous Rectifier, No Schottky Diodes
•
Adjustable Switching Limit Current to Optimize inductor size
•
0.3
mA Shut−down Control with “True−Cut off”
•
Input Voltage Range from 2.7 V to 5.5 V
•
200 mV Feedback Voltage
•
Output Over−voltage and Thermal Shut Down Protection
Typical Applications
•
Portable Flashlight / Torch Lights
Figure 1. Typical Application Circuit
L1: TDK RLF7030T−4R7M3R4
C1: 1 mF 6.3 V X5R
C1: 1 mF 6.3 V X5R
C2: 10 mF 3.6 V 0805
TDK: C2012X5R0J106MT
C3: 22 mF 6.3 V X5R
C3: 22 mF 6.3 V X5R
TDK: C2012X5R0J226MTJ
Vin
Cin
1 mF
1 Cell
Li−Ion
2.7 to 5.5
Li−Ion
2.7 to 5.5
C2
10 mF
4.7 mH
L1
PVIN
VIN
LX1
LX1
LX2
VOUT
VS
NCP5030
PGND
FB
COMP
AGND
CTRL
ENABLE
39 k
R2
100 k
100 k
330 pF
22 pF
PCA
C5
C4
R
SENSE
R3
220 m
R1
C
in
C
out
C3
22 mF
D1
5030
= Specific Device Code
A
= Assembly Location
Y
= Year
WW
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
WDFN12 3x4
MT SUFFIX
CASE 506AY
MARKING
DIAGRAM
DIAGRAM
http://onsemi.com
5030
AYWWG
G
1
PIN CONNECTIONS
(Top View)
13
12
11
10
9
8
7
1
2
3
4
5
6
PCA
AGND
VIN
VS
VOUT
LX2
FB
COMP
CTRL
PVIN
LX1
LX1
Exposed pad (Pin 13) is PGND
must be soldered to PCB GND plane
1
12
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION