APE1912 Datasheet, PDF (1/7 Pages) Advanced Power Electronics Corp. – STEP-UP PWM DC/DC CONVERTER

Advanced Power
Electronics Corp.
FEATURES
Input Voltage：3V to 13V
Output Voltage：3.3V to 20V
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.
Halogen Free Product
TYPICAL APPLICATION
APE1912
STEP-UP PWM DC/DC CONVERTER
DESCRIPTION
The APE1912 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 APE1912 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= 3.0 ~ 4.5V
R1
100K
C1
10uF
C3
0. 1uF
C2
0. 47 uF
L1
2.2uH
U1
EN
Vcc
FB
SS
APE 1912
C8
0.47 uF
SGND
NC
SW
PGND
D1
B 540A
Vout= 5 V
C4
C5
R4
220uF
22uF
12K
V_OUT < 8V, V_OUT = V_FB x (1+R4/R3) , V_FB = 1.0V, R3 = 1K
20mΩ < Cout ESR < 80mΩ
R3
R5
3K
470R
C7
0. 1 uF
Data and specifications subject to change without notice
1
20130222V1.1