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PDF APE1911 Data sheet ( Hoja de datos )
| Número de pieza | APE1911 | |
| Descripción | STEP-UP PWM DC/DC Converter | |
| Fabricantes | Advanced Power Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APE1911 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Advanced Power
Electronics Corp.
FEATURES
Input Voltage：3V to 20V
Output Voltage：3.3V to 32V
Duty Ratio：0% to 85% PWM Control
Oscillation Frequency：500KHz.
Enable and Thermal Shutdown Function.
Internal Current Limit.
Built-in N-channel MOSFET
ESOP-8 & Pb-Free Package.
APE1911
STEP-UP PWM DC/DC Converter
DESCRIPTION
The APE1911 is high efficient step-up DC/DC
converter. Large output current is possible having a built in
internal N channel MOSFET, and using an external coil and
diode.
The APE1911 can be operated at switching
frequencies of 500 kHz allowing for easy filtering and low
noise, the size of the external components can be reduced.
Output voltage is programmable with 1.0V of standard
voltage supply internal, and using externally connected
components, output voltage (FB) can be set up at will. The
soft-start time can be programmed by outside capacitor; the
function prevents overshoot at startup. Build inside Current
limit, Thermal Shutdown and enable functions.
TYPICAL APPLICATION
VCC=5V
R1
100K
C1
470uF
C7
0.1uF
C3
Option
C2
0.47uF
L1
22uH
U1
1 EN
2 Vcc
3 FB
4 SS
APE1911
C8
0.47uF
SGND 8
PGND 7
SW 6
SW 5
D1
B340A
Vout=12V
C4
470uF
C5
4.7uF
R4
11K
R3
1K
VOUT = VFB x (1+R4/R3) , VFB = 1.0V, R3 = 1K ~3KΩ
PACKAGE & ORDERING INFORMATION
APE1911X
Package Type
MP : ESOP-8
( Top View )
EN 1
VCC 2
FB 3
SS 4
Exposed
pad
8 SGND
7 PGND
6 SW
5 SW
ESOP-8
(EP is connect to SW)
Data and specifications subject to change without notice
1
201010182
1 page  
Advanced Power
Electronics Corp.
FUNCTION DESCRIPTION
APE1911
Output Capacitor Selection
The output capacitor is required to keep the output voltage ripple small and to
ensure regulation loop stability. The output capacitor must have low impedance at the
switching frequency. A low ESR capacitor sized for maximum RMS current must be
used. The low ESR requirements needed for low output ripple voltage.
The capacitor voltage rating should be at least 1.5 times greater than the input
voltage, and often much higher voltage ratings are needed to satisfy.
Output Capacitor Selection
When laying out the PC board, the following suggestions should be taken to ensure
proper operation of the APE1911. These items are also illustrated graphically in below.
1. The power traces, including the Source trace, the Schottky and the C1 trace should
be kept short, direct and wide to allow large current flow.
2. The power ground is keep C4’s ground closed and far away signal ground.
3. The signal ground trance is distant from power ground trance.
4. The exposed pad is connecting to SW trace closely and widely. (Reduce IC
temperature)
5. Do not trace signal line under inductor.
(APE1911 PCB Layout -Top View)
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet APE1911.PDF ] | |
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