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PDF APW7312 Data sheet ( Hoja de datos )
| Número de pieza | APW7312 | |
| Descripción | 2A 24V 340kHz synchronous Buck Converter | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW7312
2A 24V 340kHz synchronous Buck Converter
Features
General Description
• Wide Input Voltage from 4.5V to 24V
APW7312 is a 2A synchronous buck converter with inte-
• 2A Continuous Output Current
grated power MOSFETs. The APW7312 design with a cur-
• Adjustable Output Voltage from 0.925V to 20V
rent-mode control scheme, can convert wide input volt-
• Intergrated High/Low Side MOSFET
age of 4.5V to 24V to the output voltage adjustable from 0.
• PFM/PWM mode Operation
• Fixed 340kHz Switching Frequency
925V to 20V to provide excellent output voltage regulation.
The APW7312 is equipped with an automatic PFM/PWM
mode operation. At light load, the IC operates in the PFM
• Stable with Low ESR Ceramic Output Capacitors mode to reduce the switching losses. At heavy load, the
• Power-On-Reset Detection
IC works in PWM.
• Programmable Soft-Start
The APW7312 is also equipped with Power-on-reset, soft-
• Over-Temperature Protection
start, soft-stop, and whole protections (under-voltage,
• Current-Limit Protection with Frequency Foldback over-temperature, and current-limit) into a single package.
• Enable/Shutdown Function
This device, available SOP-8, provides a very compact
• Small SOP-8 Package
system solution external components and PCB area.
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
Pin Configuration
• LCD Monitor/TV
• Set-Top Box
• DSL, Switch HUB
• Notebook Computer
Simplified Application Circuit
VIN
BS 1
VIN 2
LX 3
GND 4
APW7312
SOP-8
(Top View)
8 SS
7 EN
6 COMP
5 FB
APW7312
VOUT
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Apr., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
1 page  
APW7312
Typical Operating Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
VIN = 19V
VIN = 24V
VIN = 12V
VOUT = 5V
0.001
0.01
0.1
1
10
Output Current (A)
VIN Supply Current vs. VIN Supply
Voltage
TA=25oC
VOUT = 1.2V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
VIN = 12V
0.001
0.01
0.1
1
10
Output Current (A)
Soft Start Time vs. SS pin to GND
Capacitance
VIN =12V VOUT =3.3V, TA=25oC
The time of 10%~90%VOUT
5 10 15 20 25
VIN Supply Voltage (V)
EN UVLO Threshold Voltage vs.
VIN Supply Voltage
TA=25oC
VEN Rising
VEN Falling
5 10 15 20
VIN Supply Voltage (V)
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Apr., 2013
25
5
SS pin to GND Capacitance (nF)
Reference Voltage vs. VIN Supply
Voltage
5 10 15 20 25
VIN Supply Voltage (V)
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
5 Page 
APW7312
Typical Application Circuit
VIN
4.5V~24V
C1
10µF
R4
100k
C4
0.1µF
C2
(option*) 2
VIN
7
EN
1
BS
LX 3
8 APW7312
SS
6
COMP
FB
GND
R3
6.8k 4
5
C5
3.9nF
C3
10nF
L1
10µH
R1
24K
R2
9.1K
VOUT
3.3V/3A
C6
22µF
* For cirtical condition, like plug in, the large capacitace and high voltage rating are needed to avoid the high spike
voltage.
Recommended Feedback Compensation Value
Vin(V)
24
12
12
12
VOUT(V)
5
5
3.3
2.5
L1(µH)
10
10
10
10
C6(µF)
22(Ceremic)
44 (Ceremic)
22 (Ceremic)
22 (Ceremic)
R1(KΩ)
39
39
24
15
R2(KΩ)
9.1
9.1
9.1
9.1
R3(KΩ)
6.8
5
6.8
6.8
C5(nF)
3.9
1.5
3.9
3.9
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Apr., 2013
11
www.anpec.com.tw
FreeDatasheethttp://www.datasheetlist.com/
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet APW7312.PDF ] | |
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