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PDF APW7159A Data sheet ( Hoja de datos )
| Número de pieza | APW7159A | |
| Descripción | Dual Channel Synchronous Buck PWM Controller | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW7159A
Dual Channel Synchronous Buck PWM Controller for SMPS
Features
General Description
• Single 12V Power Supply Required
• Excellent Output Voltage Regulation
- 1.0V±0.8% Internal Reference Over Line and
Temperature
• Simple Single Loop Control Design
- Voltage Mode PWM Control
• 0~100% Duty Ratio
• Programmable Frequency Range from 50kHz to
400kHz (Constant 50kHz when Floating)
• Integrated Soft-Start and Soft-Off (Patent Pending)
• Support Pre-Biased Power-On
• Both Channel with 180o Phase Shift
• Integrated Boot-Strap Diode
• Over-Current Protection
- Sense High Side MOSFET’s R
DS(ON)
• 120% Over-Voltage Protection
• 50% Under-Voltage Protection
• Over-Temperature Protection
• Available in SOP-20 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• SMPS
Simplified Application Circuit
The APW7159A is a dual channel voltage mode and syn-
chronous PWM controller which drives dual N-channel
MOSFETs. The two channels are operated with 180 de-
gree phase shift.
The device integrates all of the control, monitoring, and
protecting functions into a single package; provides two
controlled power output with over-voltage, over-
temperature, and over-current protections.
The APW7159A provides excellent regulation for output
load variation. The internal 1.0V temperature-compen-
sated reference voltage provides high accuracy of 0.8%
over line and temperature. The device includes a 50kHz
free-running triangle-wave oscillator that is adjustable
from 50kHz to 400kHz.
The APW7159A has been equipped with excellent pro-
tection functions: POR, OCP, UVP, and OVP protections.
The Power-On-Reset (POR) circuit can monitor the VCC
and OCSET voltage to make sure the supply voltage ex-
ceeds their threshold voltage while the controller is
running. The Over-Current Protection (OCP) monitors the
output current by using the voltage drop across the high
side MOSFET’s RDS(ON). When the output current reaches
the trip point, the controller will be latched. Under-Voltage
Protection (UVP) and Over-Voltage Protection (OVP) moni-
tor the FB voltage to protect APW7159A from burnout when
output voltage is under 50% or over 120% of normal out-
put voltage. The APW7159A is available in SOP-20
package.
VIN
Phase Shift
VOUT1
PWM
Controller
1
PWM
Controller
2
APW7159A
VOUT2
ANPEC reserves the right to make changes to improve reliability or manufacturSability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Oct., 2009
1
www.anpec.com.tw
1 page  
APW7159A
Typical Operating Characteristics
1003
Reference Voltage vs. Junction
Temperature
1002
1001
1000
999
998
997
996
-40 -20
0 20 40 60 80 100 120
Junction Temperature
Switching Frequency vs. Junction
Temperature
55
54
53
52
51
50
49
48
47
46
45
-40 -20 0 20 40 60 80 100 120
Junction Temperature
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Oct., 2009
5
www.anpec.com.tw
5 Page 
APW7159A
Typical Application Circuit
VOUT1
5V/30A
2200µFx2
ESR=30mΩ
15nF
1k
2k
10µF 1µF
1nF
(option)
100nF
L1 APM3109
7.2µH
(option)
4R7
APM3106
OCSET1
BOOT1
UGATE1
PHASE1
LGATE1
OCSET2
BOOT2
UGATE2
PHASE2
LGATE2
2k
1nF
(option)
100nF
1µF 10µF
APM3106
APM3109
(option)
L2
7.2µH
4R7
1.5nF
33nF
12k
12k
6.8nF
VVCC
5R1
3k
1µF
PGND
PGND
COMP1
COMP2
APW7159
FB1 FB2
VCC
RT
GND
SS
6.8nF
1.5nF
33nF
12k
12k
47nF
RT
5.2k
VIN
470µF
VOUT2
3.3V/30A
2200µFx2
ESR=30mΩ
15nF
1k
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Oct., 2009
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet APW7159A.PDF ] | |
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