APE1911 Datasheet, PDF (1/9 Pages) Advanced Power Electronics Corp. – STEP-UP PWM DC/DC Converter

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.
TYPICAL APPLICATION
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.
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
C5
R4
11K
470uF 4.7uF
R3
1K
V_OUT = V_FB x (1+R4/R3) , V_FB = 1.0V, R3 = 1K ~3KΩ
PACKAGE & ORDERING INFORMATION
APE1911X
Package Type
MP : ESOP-8
Data and specifications subject to change without notice
( Top View )
EN 1
V_CC 2
FB ³
SS 4
Exposed
pad
8 SGND
7 PGND
6 SW
5 SW
ESOP-8
(EP is connect to SW)
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