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PDF APW7078 Data sheet ( Hoja de datos )
| Número de pieza | APW7078 | |
| Descripción | Single PWM Switching Controller | |
| Fabricantes | Anpec Electronics Coropration | |
| Logotipo |  |
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APW7078
Single PWM Switching Controller
Features
General Description
• 2.3 to 5.5V Input Voltage Range
• Adjustable Frequency: Maximum 1MHZ
www.DataSheet4U•.com Incorporates Soft-start Function
• Built-in Short-circuit Detection Circuit (SCP)
• Low Operating Current: Maximum to 1mA
• Low Shutdown Current: Maximum to 1mA
• Package: MSOP-8, TSSOP-8
• Under Voltage Lockout
• Lead Free Available (RoHS Compliant)
Applications
• LCD Display Power Source
• Camcorders VCRs, MP3 and Digital Still
Camera
• Hand-held and Communication Instruments
• PDAs
The A PW 7078 is a single P W M, s tep-up DC-DC
c ont roller wit h low operating volt age applic at ion
int egr at ing s oft-st art and short circ uit detect ion
function. And the oscillator switching frequency on chip
can be operated by terminating OSC pin to connect
c apac itor and resis t or for adjus t able operating
frequency. Soft-start is adjusted with external capacitor,
whic h s et s t he input current ramp. Bes ides, the
external compensation FB pin will apply the flexibility in
the dynamic loop status, which allow using small, low
equivalent series res istance (ES R) c eramic output
capacitors.
Pinouts
INV
SCP
VDD
CTL
1
2
3
4
8 FB
7 OSC
6 GND
5 OUT
Ordering and Marking Information
APW7078
APW7078
APW7078 X :
APW7078 O :
Lead Free Code
Handling Code
Temp. Range
Package Code
APW7078
XXX
XX
APW7078
XXXXX
Package Code
X : MSOP - 8
O : TSSOP-8
Temp. Range
I : -40 to 85 °C
Handling Code
TU : Tube
TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
XXXXX - Date Code
XXXXX - Date Code
No tes : ANPEC lea d-free produ cts co nta in mol din g comp oun ds/die attach m ate ria ls and 10 0% matte in pla te
te rmin atio n fi nish ; wh ich are full ycompl iant with Ro HS and compa tibl e wi th both SnPb an d le ad-free sold ieri ng
op era tio ns. AN PEC le ad-free produ cts me et or exceed th e l ead -free req uireme nts of IPC /JEDEC J STD -02 0C
fo r MSL classi ficati on at lea d-fre e p eak re flo w temp era ture.
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
C opyright © ANPEC Electronics C orp.
Rev. A.3 - Nov., 2005
1
www.anpec.com.tw
1 page  
APW7078
Application Schematic
VIN
2.5V~5.5V
L1 D1
C1
22uF
www.DataSheet4U.com
C2
0.1uF
R6
2R2
R1
C8 390K
1uF
Q2
2N7002
R2
9.1K
1 INV
2 SCP
3 VDD
4 CTL
FB 8
OSC 7
GND 6
OUT 5
R3
150K
Cp
C3
270pF
68pF
10uH
SS12
R5
12K
R4
4.3K
C4
0.1uF
Q1
APM2300A
C5
33uF
Fig2: APW7078 Step-up Application for Adjust Voltage
VOUT
9V
100mA
C6
0.1uF
26V D2
VIN
2.5V~5.5V
C8
1uF
C9
1uF
C1
22uF
C2
0.1uF
R6
2R2
R10
C7 390K
1uF
1 INV
2 SCP
3 VDD
4 CTL
FB 8
OSC 7
GND 6
OUT 5
C3
R3 270pF
1.2M
R2
75K
D3
L1
22uH
C10
0.1uF
C11
0.1uF
D1
SS12
C12
1uF
R5
1K
R4
3.3K
C4
0.1uF
Q1
APM2300A
C5
100uF
D4
9V
C6
0.1uF
-9V
C13
3.3uF
Q2
2N7002
*R2 100K is recommended
Fig3. APW7078 Multiple-output for TFT LCD Panel Power
C opyright © ANPEC Electronics C orp.
Rev. A.3 - Nov., 2005
5
www.anpec.com.tw
5 Page 
APW7078
Function Description(Cont.)
Input Capacitor (Cont.)
effects input voltage ripple of the IC. For additional
input voltage filtering, a 1µF capac itor can be placed
in parallel with CIN, close to the VDD pin, to shunt any
high frequency noise to ground.
www.DataSheet4U.com
Demo Board Circuit Layout
Top Layer
Bottom Layer
C opyright © ANPEC Electronics C orp.
Rev. A.3 - Nov., 2005
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet APW7078.PDF ] | |
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