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PDF AP2014A Data sheet ( Hoja de datos )
| Número de pieza | AP2014A | |
| Descripción | Synchronous PWM Controller | |
| Fabricantes | ANACHIP | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP2014A (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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Synchronous PWM Controller
Features
- Synchronous Controller in 8-Pin Package
- Operating with single 5V or 12V supply voltage
- Internal 200KHz Oscillator (400KHz for AP2014A)
- Soft-Start Function
- Fixed Frequency Voltage Mode
- 500mA Peak Output Drive Capability
- Protects the output when control FET is shorted
- SOP-8L/PDIP-8L Pb-Free package
Applications
- Graphic Card
- Hard Disk Drive
- DDR memory source sink Vtt application
- Low cost on-board DC to DC such as 5V to 3.3V,
2.5V or 1.8V
AP2014/A
General Description
The AP2014 controller IC is designed to provide a
low cost synchronous Buck regulator for on-board
DC to DC converter applications. With the migration
of today’s ASIC products requiring low supply
voltages such as 1.8V and lower, together with
currents in excess of 3A, traditional linear regulators
are simply too lossy to be used when input supply is
5V or even in some cases with 3.3V input supply.
The AP2014 together with dual N-channel
MOSFETs such as AF9410, provide a low cost
solution for such applications. This device features
an internal 200KHz oscillator (400KHz for "A"
version), under-voltage lockout for both Vcc and Vc
supplies, an external programmable soft-start
function as well as output under-voltage detection
that latches off the device when an output short is
detected.
Pin Assignments
(Top View)
FB 1
8 SS
Vcc 2 AP2014/A 7 Comp
LDrv 3
6 Vc
GND 4
5 HDrv
SOP-8L/PDIP-8L
Pin Descriptions
Pin Pin
Name No.
Description
FB
Vcc
LDrv
GND
HDrv
Vc
Comp
SS
This pin is connected directly to the output of the
1 switching regulator via resistor divider to provide
feedback to the Error amplifier.
This pin provides biasing for the internal blocks of
the IC as well as power for the low side driver. A
2 minimum of 1uF, high frequency capacitor must be
connected from this pin to ground to provide peak
drive current capability.
3 Output driver for the synchronous power MOSFET.
This pin serves as the ground pin and must be
connected directly to the ground plane. A high
4 frequency capacitor (0.1 to 1uF) must be connected
from V5 and V12 pins to this pin for noise free
operation.
5 Output driver for the high side power MOSFET.
This pin is connected to a voltage that must be at
least 4V higher than the bus voltage of the switcher
(assuming 5V threshold MOSFET) and powers the
6 high side output driver. A minimum of 1uF, high
frequency capacitor must be connected from this
pin to ground to provide peak drive current
capability.
Compensation pin of the error amplifier. An external
7
resistor and capacitor network is typically connected
from this pin to ground to provide loop
compensation.
This pin provides soft-start for the switching
regulator. An internal current source charges an
external capacitor that is connected from this pin to
8 ground which ramps up the output of the switching
regulator, preventing it from overshooting as well as
limiting the input current. The converter can be
shutdown by pulling this pin below 0.5V.
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this
product. No rights under any patent accompany the sale of the product.
Rev. 1.2 Nov 29, 2005
1/12
1 page  
Synchronous PWM Controller
AP2014/A
Typical Application Circuit (Continued)
(3)
D2
1N4148
D1
1N4148
C1
0.1uF
VIN=12V
C8
470u
C11
0.1u
R3
8.2
C3
100u
C5
0.47u
C4
0.1u
U1
1
2
3
4
FB SS
Vcc Comp
LDrv Vc
GND HDrv
8
7
6
5
AP2014
C6
10nF
R6
39k
C20
100p
R1
10K
Q1
AF4910N-1
L1
10uH/6A
R2
3K
Q2
AF4910N-2
Vout +5V/5.0A
C13
470u
C17
0.1u
(4)
D2
1N4148
R3
8.2
ZD
6.2V
C3
100u
R3
8.2
C5
0.47u
Single Supply 12V Input
RZD
1.2K
D1
1N4148
C4
0.1u
U1
1
2
3
4
FB SS
Vcc Comp
LDrv Vc
GND HDrv
8
7
6
5
AP2014
C6
10nF
R6
47k
C1
0.1uF
C20
100p
VIN=24V
C8 C11
470u 0.1u
R1
10K
Q1-1
AF4928N-1
L1
10uH/6A
R2
3.3K
Q1-2
AF4928N-2
Vout +5V/4.0A
C13
470u
C17
0.1u
Anachip Corp
www.anachip.com.tw
IZD(Њ15mA)=(VIN-VD2-VZD)/RZD
Single Supply 24V Input
5/12
Rev. 1.2 Nov 29, 2005
5 Page 
Synchronous PWM Controller
Package Information
Package Type: SOP-8L
AP2014/A
L
VIEW "A"
D
7 (4X)
0.015x45
7 (4X)
eB
y
VIEW "A"
Symbol
A
A1
A2
B
C
D
E
e
H
L
y
T
Dimensions In Millimeters
Min.
Nom.
Max.
1.40 1.60 1.75
0.10 - 0.25
1.30 1.45 1.50
0.33 0.41 0.51
0.19 0.20 0.25
4.80 5.05 5.30
3.70 3.90 4.10
- 1.27 -
5.79 5.99 6.20
0.38 0.71 1.27
- - 0.10
0O - 8O
Dimensions In Inches
Min.
Nom.
Max.
0.055
0.063
0.069
0.040 - 0.100
0.051
0.057
0.059
0.013
0.016
0.020
0.0075 0.008
0.010
0.189
0.199
0.209
0.146
0.154
0.161
- 0.050 -
0.228
0.236
0.244
0.015
0.028
0.050
- - 0.004
0O - 8O
Anachip Corp
www.anachip.com.tw
11/12
Rev. 1.2 Nov 29, 2005
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AP2014A.PDF ] | |
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