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PDF APW8726 Data sheet ( Hoja de datos )
| Número de pieza | APW8726 | |
| Descripción | 5V to 12V Single Buck Voltage Mode PWM Controller | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW8726
5V to 12V Single Buck Voltage Mode PWM Controller
Features
General Description
• Wide 5V to 12V Supply Voltage
The APW8726 is a voltage mode, fixed 300kHz switching
• Power-On-Reset Monitoring on VCC
frequency, synchronous buck converter. The APW8726
• Excellent Output Voltage Regulations
allows wide input voltage that is either a single 5~12V or
- 0.6V Internal Reference
two supply voltage(s) for various applications. A power-
- ±0.6% Over-Temperature Range
on-reset (POR) circuit monitors the VCC supply voltage
• Integrated Soft-Start
to prevent wrong logic controls. A built-in soft-start circuit
• Voltage Mode PWM Operation with External prevents the output voltages from overshoot as well as
limits the input current. An internal 0.6V temperature-com-
Compensation
pensated reference voltage with high accuracy is de-
• Up to 90% Duty Ratio for Fast Transient Response signed to meet the requirement of low output voltage
• Constant Switching Frequency
applications. The APW8726 provides excellent output volt-
- 300kHz ±10%
age regulations against load current variation. APW8726
• Integrated Bootstrap Forward P-CH MOSFET
is built in remote sense function for applications that re-
• 50% Under-Voltage Protection
quire remote sense. (TDFN-10 3mmx3mm Package Only)
• 125% Over-Voltage Protection
• Adjustable Over-Current Protection Threshold
The controller’s over-current protection monitors the out-
put current by using the voltage drop across the RDS
- Using the RDS(ON) of Low-Side MOSFET
(ON) of low-side MOSFET, eliminating the need for a cur-
• Shutdown Control by COMP
rent sensing resistor that features high efficiency and
• Power Good Monitoring (TDFN-10 3mmx3mm low cost. In addition, the APW8726 also integrates excel-
Package Only)
lent protection functions. The over-voltage protection (OVP)
• Remote Feedback Sense for Excellent Output , under-voltage protection (UVP). OVP circuit which moni-
Voltage (TDFN-10 3mmx3mm Package Only)
tors the FB voltage to prevent the PWM output from over
• TDFN3x3-10 Package
voltage, and UVP circuit which monitors the FB voltage to
prevent the PWM output from under voltage or short circuit.
• Lead Free and Green Devices Available
The APW8726 is available in TDFN3x3-10 packages
(RoHS Compliant)
Applications
• Graphic Cards
• DSL, Switch HUB
• Wireless Lan
• Notebook Computer
• Mother Board
• LCD Monitor/TV
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.1 - Sep., 2012
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APW8726
Electrical Characteristics (Cont.)
Refer to the typical application circuit. These specifications apply over V = 12V, T = -40°C to 85°C, unless otherwise
VCC
A
noted. Typical values are at TA = 25°C.
Symbol
Parameter
Test Conditions
APW8726
Min. Typ. Max.
Unit
Remote Sense
IFBRTN Remote sense source current
POWER GOOD (Only for TDFN3 3-10 Package)
- 12 - µA
IPOK POK Leakage Current
POK Threshold
VPOK=5V
VFB is from low to target value
(POK Goes High)
VFB Falling, POK Goes Low
- 0.1 1 µA
85 90 95
%
45 50 55
%
VFB Rising, POK Goes Low
120 125 130
%
POK Delay Time
Note 4: Guaranteed by design, not production tested.
- 3 - ms
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Sep., 2012
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8726
Typical Application Circuit
OFF
ON
Q3
2N7002
VCC Supply
(5~ 12V)
R4
C4 2R2
1µF
R5
100 kΩ
C2
100 nF
R2
2kΩ
C1
100 pF
APW8726
6
VCC
3 POK
9 COMP
BOOT 1
UGATE 2
PHASE 10
8 FB
LGATE/ 5
OCSET
GND
4
R1
1kΩ
FBRTN 7
R2
1kΩ C3 R3
22nF
1kΩ
C3
0.1µF
C I N1
1µ F
Q1
APM 2510
L1
0 .5µ H
R OCSET
Q2
APM 2556
VIN
C I N2
220µ F x 2
V+ _near
VOUT
C OUT
1000 µF x 2
V -_near
Note: Power OK Indicator (POK) (only for TDFN3x3-10 package).
V+ _remote
COUT
MLCC
22µFx4
L
O
A
D
V -_remote
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Sep., 2012
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet APW8726.PDF ] | |
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