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PDF BM1513 Data sheet ( Hoja de datos )
| Número de pieza | BM1513 | |
| Descripción | PWM Control 2-3A Step-Down Converter | |
| Fabricantes | ETC | |
| Logotipo |  |
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PWM Control 2-3A Step-Down Converter
BM1513/A
FEATURES
Input voltage: 3.6V to 18V.
Output voltage: 0.8V to VCC.
BM1513 is 2A ; BM1513A is 3A
Oscillation frequency: 400KHz
Soft-start, Current limit, Enable function
Thermal Shutdown function
Built-in internal SW P-channel MOS
replace AP151x series
SOP-8L Pb-Free Package.
APPLICATIONS
portable DVD
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
Microprocessor core supply
Networking power supply
GENERAL DESCRIPTION
BM1513/A consists of step-down switching
regulator with PWM control. These devices
include a reference voltage source, oscillation
circuit, error amplifier, internal PMOS and etc.
BM1513/A provides low-ripple power, high efficiency
and excellent transient characteristics. The PWM
control circuit is able to very 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 prevent s 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 400KHz to 60KHz.
Also, an internal compensation block is built in to
minimum external component count.
These ICs can function as step-down switching
regulators. They serve as ideal power supply units
for portable devices when coupled with the SOP-8L
mini-package, providing such outstanding features
as low current consumption. Since this converter
can accommodate an input voltage of up to 18V, it
is also ideal when operating via an AC adapter.
PIN ASSIGNMENTS
●FB 1
8 Vss
EN 2
OCSET 3
BM1513/A
7 Vss
6 Output
VCC 4
5 Output
PIN DESCRIPTIONS
Name Pin
FB 1
EN 2
OCSET
VCC
3
4
Output 5、6
VSS 7、8
Description
Feedback pin.
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation
stopped
(All circuits deactivated)
Add an external resistor to set
max output current.
IC power supply pin
Switch Pin. Connect external
inductor/diode here. Minimize
trace area at this pin to reduce
EMI.
GND Pin
1/7
Free Datasheet http://www.datasheet4u.net/
1 page  
PWM Control 2-3A Step-Down Converter
BM1513
Typical Performance Characteristics (Continued)
BM1513 Vout Ripple
(Vin=12V; Vout=3.3V; Iout=0.2A)
BM1513 Vout Ripple
(Vin=12V; Vout=3.3V; Iout=2A)
Test Circuit
Open
VCC OUTPUT
OCSET
FB
Open
A EN VSS
A VCC OUTPUT FB
+ OCSET
EN VSS
VIN C1
12v 470uF
R4
10RV05CKC
OUTPUT
ON
FB
1
FB
3K
+
OCSET
2 EN
EN VSS OFF
3
+V
OCSET
4
C3 VCC
0.1uF
VSS
VSS
Output
Output
8
7
6
5
D1
B220
L 22 uH
R1
4.7K
R2
1.5K
VOUT
3.3v
C2
470uF
5/7
Free Datasheet http://www.datasheet4u.net/
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet BM1513.PDF ] | |
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