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AP1511 PDF 데이터시트 ( Data , Function )

부품번호 AP1511 기능
기능 PWM Control 5A Step-Down Converter
제조업체 Anachip Corporation
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AP1511 데이터시트, 핀배열, 회로
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PWM Control 5A Step-Down Converter
AP1511
„ Features
- Input voltage: 3.6V to 23V.
- Output voltage: 0.8V to VCC.
- Duty ratio: 0% to 100% PWM control
- Oscillation frequency: 300KHz typ.
- Soft-start, Current limit, Enable function
- Thermal Shutdown function
- Built-in internal SW P-channel MOS
- SOP-16L Pb-Free Package.
„ Applications
-Microprocessor core supply
-Networking power supply
-LCD MNT, TV power supply
-Telecom power supply
„ Pin Assignments
(Top View)
GND
GND
FB
EN
OCSET
Vcc
Output
Output
1
2
3
4
5
6
7
8
AP1511
16 GND
15 GND
14 NC
13 NC
12 VC
11 PVcc
10 Output
9 Output
SOP-16L
„ General Description
AP1511 consists of step-down switching regulator
with PWM control. These devices include a reference
voltage source, oscillation circuit, error amplifier,
internal PMOS and etc.
AP1511 provides low-ripple power, high efficiency,
and excellent transient characteristics. The PWM
control circuit is able to vary the duty ratio linearly
from 0 up to 100%. This converter also contains an
error amplifier circuit as well as a soft-start circuit that
prevents overshoot at startup. An enable function,
an over current protect function and a short circuit
protect function are built inside, and when OCP or
SCP happens, the operation frequency will be
reduced from 300KHz to 30KHz. Also, an internal
compensation block is built in to minimum external
component count.
With the addition of an internal P-channel Power MOS,
a coil, capacitors, and a diode connected externally,
these ICs can function as step-down switching
regulators. They serve as ideal power supply units for
portable devices when coupled with the SOP-16L
mini-package, providing such outstanding features as
low current consumption. Since this converter can
accommodate an input voltage up to 23V, it is also
suitable for the operation via an AC adapter.
„ Pin Descriptions
Pin Pin
Name No.
Description
GND 1 GND pin
GND 2 GND pin
FB 3 Feedback pin
EN
4
H: Normal operation
L: Step-down operation stopped
OCSET
5
Add an external resistor to set max
output current.
Vcc 6 Signal Vcc
Output 7 Switch output pin
Output 8 Switch output pin
Output 9 Switch output pin
Output 10 Switch output pin
PVcc 11 Power Vcc
VC 12 Voltage clamp pin
NC 13 Not connected
NC 14 Not connected
GND 15 GND pin
GND 16 GND pin
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. 1.5 Apr 10, 2006
1/5




AP1511 pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
PWM Control 5A Step-Down Converter
AP1511
„ Typical Performance Characteristics
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.0
Efficiency (Vin=+5V)
Vout:3.3V
1.0 2.0 Iout3(.A0 ) 4.0 5.0 6.0
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.0
Efficiency (Vin=+12V)
Vout:3.3V
Vout:5.0V
1.0 2.0 3.0 4.0 5.0 6.0
Iout (A)
„ Test Circuit
open
PVcc OUTPUT
VCC
FB
OCSET
A EN VSS
open
PVcc OUTPUT
A VCC
FB
+ OCSET
- EN VSS
Enable function test
Feedback function test
PVcc OUTPUT
VCC FB
+ OCSET
- EN VSS
+V
-
Operation function test
„ Function Description
PWM Control
The AP1511 consists of DC/DC converters that
employ a pulse-width modulation (PWM) system.
In converters of the AP1511, the pulse width varies
in a range from 0 to 100%, according to the load
current. The ripple voltage produced by the
switching can easily be removed through a filter
because the switching frequency remains constant.
Therefore, these converters provide a low-ripple
power over broad ranges of input voltage and load
current.
Anachip Corp.
www.anachip.com.tw
Rev. 1.5 Apr 10, 2006
4/5

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