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APE1723-HF-3 Schematic ( PDF Datasheet ) - Advanced Power Electronics

Teilenummer APE1723-HF-3
Beschreibung 1A PWM Buck DC/DC Converter
Hersteller Advanced Power Electronics
Logo Advanced Power Electronics Logo 




Gesamt 11 Seiten
APE1723-HF-3 Datasheet, Funktion
Advanced Power
Electronics Corp.
APE1723-HF-3
200kHz, 1A PWM Buck DC/DC Converter
Features
Description
Adjustable Output Voltage:
From 0.745V to 24V
Fixed switching frequency of 200kHz
Thermal-shutdown and current-limit protection.
ON/OFF shutdown control input.
Short Circuit Protection (SCP).
Operating voltage up to 26V.
Output load current up to 1A.
Low-power standby mode.
Built-in switching transistor on chip.
SO-8 or 5-Lead SOT-23 packages
The APE1723 series are monolithic ICs designed as a
step-down DC/DC converter, and have the ability to drive a
1A load without an external transistor, saving board space.
The external shutdown function can be controlled with logic
level signals to put the device into standby mode. The internal
compensation provides feedback control for good line and
load regulation without external components.
Thermal shutdown is provided to prevent damage from
over-temperature operation, and current limiting is available
to protect the output switch. If the APE1723’s VFB is taken
below 0.5V, the switching frequency will be reduced.
The APE1723 operates at a fixed switching frequency of
200kHz allowing smaller sized filter components. Other features
include a guaranteed ±3% tolerance on output voltage under
specified input voltage and output load conditions.
The APE1723 is available in a SOT-23-5 or SO-8 package.
RoHS-compliant, halogen-free.
Typical Application
VIN=12V
C1
100uF
R3
C2 100k
0.1uF
C4
0.1uF
U1
5
APE1723
VIN SW
1
4 EN FB 3
ON/OFF 2 Vss
L1 Vout=5V/1A
(Refer to table 1)
R1
6.8k
D1
B140A
C3 C6
220uF 0.1uF
R2
1.2k
VOUT = VFB x (1+R1/R2) , VFB= 0.745V, R2 = 0.75k~4k
Ordering information
APE1723XX-HF-3TR
Package Type:
M: SO-8
Y5 : SOT-23-5
Packing Type:
TR: Tape and reel
Examples:
APE1723M-HF-3TR in RoHS-compliant, halogen-free SO-8, shipped on tape and reel (3000 pcs/reel).
APE1723Y5-HF-3TR in RoHS-compliant, halogen-free SOT23-5, shipped on tape and reel (3000 pcs/reel).
©2010 Advanced Power Electronics Corp. USA
www.a-powerusa.com
200812231-3 1/11






APE1723-HF-3 Datasheet, Funktion
Advanced Power
Electronics Corp.
Typical Characteristics
0.76
0.755
0.75
0.745
0.74
0.735
0.73
VFB vs. Iout
(Vin=12V)
100 300 500 800 1000 1200
Iout (mA)
Iccq vs. Vin
4.4
4
3.6
3.2
2.8
2.4
2
4.5V 8V 12V 16V 20V 24V 26V
Vin (V)
Frequency vs. Vin
260
240
220
200
180
160
140
4.5V 8V 12V 16V 20V 24V 26V
Vin(V)
©2010 Advanced Power Electronics Corp. USA
www.a-powerusa.com
APE1723-HF-3
VFB vs. Temperature
(Vin=12V, Iout=300mA)
0.76
0.755
0.75
0.745
0.74
0.735
0.73
-40 -20 0 25 50 85 105 125
Temperature (°C)
Iccq vs. Temperature
(Vin=12V)
4.4
4
3.6
3.2
2.8
2.4
2
-40 -20 0 25 50 85 105 125
Temperature (°C)
Frequency vs. Temperature
(Vin=12V, Iout=300mA)
260
240
220
200
180
160
140
-40 -20 0 25 50 85 105 125
Temperature (°C)
6/11

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