APE1920 Datasheet, PDF (1/16 Pages) Advanced Power Electronics Corp. – 680K/1.2MHz, HIGH VOLTAGE, BOOST CONVERTER

Advanced Power
Electronics Corp.
APE1920
680K/1.2MHz, HIGH VOLTAGE, BOOST CONVERTER
FEATURES
Operating Voltage from 2.6V to 5.5V
Adjustable Output Voltage Range
up to 27V
Up to 3A Output Switch Current
680K/1.2MHz Selectable Switching
Frequency
Programmable Soft-start Function
External Compensation Network
Current Limit and Thermal Shutdown
Protection
Under Voltage Lockout
< 1µA Shutdown Current
Available in the Pb-Free MESOP-10,
MESOP-8, TDFN 3x3-10L and ESOP-8
Packages
DESCRIPTION
The APE1920 is a high performance, high efficiency
step up DC-DC Converter with integrated 3A. The APE1920
converter input voltage ranging from 2.6 to 5.5V. The Output
voltage can be set up to 27V. The selectable frequency of
680 kHz and 1.2 MHz allows the use of small external
inductors and capacitors and provides fast transient
response. Current mode control with external compensation
network makes it easy to stabilize the system and keep
maximum flexibility. Programmable soft start function
minimizes impact on the input power system. Internal power
MOSFET with very low RDS (ON) provides high efficiency.
The APE1920 automatically transits from PWM to PFM
during light load condition further increasing efficiency. The
converter also provides protection functions such as Current
Limit and Thermal shutdown. The APE1920 is available in
space-saving MESOP-10, MESOP-8, TDFN 3x3-10L and
ESOP-8 packages.
TYPICAL APPLICATION
1.FREQ=High (Frequency=1.2MHz) (MESOP-10 and TDFN 3x3-10L)
VIN=5V
R3
4.7~100
C2
2*10uF
C3
0.1uF
R4
1M
C5
1nF
L1
4.7uH
U1
VCC
LX
FREQ
LX
EN
FB
R6
100K
C7
100pF
COMP
SS
C6
10nF
PGND
SGND
APE1920
VOUT=12V
D1
B340A
C1
R2
130K
220pF
C3
R8 ^3*10uF
15K
R2
VOUT = 1.238V X (1 + ------- )
R8
R8 Suggest 10K~30K
VIN ^< 4.5V, R3=10Ω
VIN > 4.5V, R3= 100Ω
Data and specifications subject to change without notice
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